RegO Cylinder & Service Valves

LP-Gas Cylinder Valves & Service Valves

ECII Safety Warnings
Purpose
In its continuing quest for safety, Engineered Controls International, Inc. is publishing safety warning bulletins explaining the hazards
associated with the use, misuse and aging of LP-Gas valves and regulators. It is hoped that these factual bulletins will make clear to
LP-Gas dealer managers and service personnel that the utmost care and attention must be used in the installation, inspection and
maintenance of these products, or problems could occur which would result in personal injury and property damage.
The National Fire Protection Association Pamphlet #58 Storage and Handling of Liquefied Petroleum Gases states in Section 1-6
that In the interests of safety, all persons employed in handling LP-Gases shall be trained in proper handling and operating procedures. ECII Warning Bulletins may be useful in training new employees and reminding older employees of potential hazards that
can occur.
It is recommended that all employees be furnished with a copy of NPGA Safety Pamphlet 306-88 LP-Gas Regulator and Valve
Inspection and Maintenance.

Nature of Warnings

Important Factors:

It is recognized that warnings should be as brief as possible, but the

factors involved in cylinder valve failure are many because of the multiple functions the valve serves. If there is any simple warning, it would
be:
Check cylinder valves for leaking components every time cylinders are filled.

The bulletin is not intended to be an exhaustive treatment of the subject of cylinder valves and certainly does not cover all safety practices
that should be followed in installation, operation and maintenance of
LP-Gas systems which include cylinder valves.

Pressure
Relief
Valve

Bonnet & Stem

Seal Assembly

Outlet
Connection
Outlet
Connection

Fixed Liquid
Level Gauge

Excess
Flow Valve

LP-Gas Cylinder Valves

These valves are mounted in DOT cylinders, and are intended to
provide one or more of the following functions:
1. Vapor service shut-off
2. Liquid service shut-off (with excess flow valve)
3. Liquid filling
4. Pressure relief
5. Fixed liquid level gauge
These functions, although simple, are extremely critical in the safe operation of an LP-Gas cylinder system.
Abuse of these valves, failure to follow a good installation and
maintenance program and attempting to use cylinder valves
beyond their normal service life can result in extremely hazardous conditions.

1. Installation: It should not be necessary to remind the readers that

cylinder valves must be installed and used in strict conformance with
NFPA Pamphlet 58, and all other applicable codes and regulations.
Codes, regulations and manufacturers recommendations have been
developed by experts with many years of experience in the LP-Gas
industry in the interest of safety for users of LP-Gas and all personnel
servicing LP-Gas systems.
Failure to fully follow these codes, regulations and recommendations could result in hazardous installations.
2. The bonnet and stem seal assembly of a cylinder valve are
extremely critical, since any malfunction could cause external
leakage and spillage.
Check bonnet to see that it is in proper position. If there is any doubt
about tightness of threaded connection between bonnet and body,
valve must be repaired in accordance with manufacturers repair
instructions before cylinder is filled. Handwheel must be in good condition, stem threads must not be worn or damaged and bonnet must
be properly assembled. This area should be examined each time the
cylinder if filled. A leakage test should be conducted while the shut-off
valve is in the open position during filling.
3. The cylinder outlet connection is usually a female POL. Threads must
be free of dents, gouges and any indication of excessive wear.
Seating surface inside this connection must be smooth and free of
nicks and scratches to assure a gas tight seal when connected to a
male POL cylinder adapter. Cylinder adapter must spin on freely all the
way, without indication of drag, roughness or excessive looseness,
and must then be tightened with a wrench. Connection must be
checked for leakage.
4. The pressure relief valve is of critical importance: Its proper operation is vital in avoiding excessive pressures during emergencies, such
as overfilling or exposure to excessive heat. No repair of this device
is allowable. Relief valve should be visually inspected and checked
for leaks each time the cylinder is returned for filling. All flow passages must be clean and free of foreign material.
Entire assembly must be free of dents, distortion or other indications
of damage. If relief valve appears to contaminated or damaged,
the cylinder valve must be replaced. (Caution: Eye protection must
be used when examining relief valves under pressure.)
5. The liquid service shut-off valve, with excess flow valve provided on
some cylinder valves, is also of critical importance. The excess flow
valve must be periodically tested for proper performance, in addition
to the inspection of the shut-off valve.
6. The fixed liquid level gauge on a cylinder valve is, when present,
essential to prevent overfilling the cylinder. The gauging valve must
operate freely, venting vapor when loosened, and sealing gas-tight
easily when tightened with the fingers. Gauge valves meant for use
with a socket key or screwdriver must also seal easily without excessive torque. The fixed liquid level gauge diptube must be of the proper length, and be in proper position. Periodic test should be conducted by weighing the cylinder after filling, to determine that it does not
contain more than the allowable amount of LP-Gas. This check
should be done periodically, and any time there is suspicion that the
gauge diptube may be damaged or broken.
25

RegO Cylinder & Service Valves

Do Not Overfill Cylinders
Do not fill a cylinder without first repairing or replacing the cylinder valve, as required, if any defect is noted.
While not required by codes, it is recommended that a plug or suitable
protection be inserted in the POL outlet of the cylinder valve at all times
except during filling and while connected for use. This will guard against
discharge of gas should the handwheel be inadvertently opened while
the cylinder is in storage or transit. This is highly advisable for small
cylinders that could be transported inside an automobile or trunk.
It is important that proper wrenches and adapters be used when filling,
servicing and installing cylinder valves in order to avoid damage to the
valve or associated piping.

Customer Safety
Since cylinders are often used by consumers without previous knowledge of the hazards of LP-Gases and the LP-Gas dealers are the only
ones who have direct contact with the consumers, it is the dealers
responsibility to make sure that his customers are properly
instructed in safety matters relating to their installation.

General Warning
All ECII Products are mechanical devices that will eventually
become inoperative due to wear, contaminants, corrosion and
aging of components made of materials such as metal and rubber.

At the very minimum, it is desirable that these customers:

1. Know the odor of LP-Gas and what to do in case they smell gas. Use
of the NPGA Scratch n Sniff leaflet could be productive.
2. Are instructed never to tamper with the system.
3. Know that when protective hoods are used to enclose regulators
and/or valves, that these hoods must be closed, but not locked.
4. Know the location of the cylinder shut-off valve in emergencies.

The environment and conditions of use will determine the safe service life
of these products. Periodic inspection and maintenance are essential.
Because ECII Products have a long and proven record of quality and
service, LP-Gas dealers may forget the hazards that can occur because
a cylinder valve is used beyond its safe service life. Life of a cylinder
valve is determined by the environment in which it lives. The LP-Gas
dealers know better than anyone what this environment is.
NOTE: There is a developing trend in state legislation and in proposed
national legislation to make the owners of products responsible for
replacing products before they reach the end of their safe useful life. LPGas dealers should be aware of legislation which could affect them.

Thread Specifications
Cylinder Valve Threads

Because of the many thread forms available on equipment used in the LP-Gas
industry today, the maze of letters, numbers and symbols which make up various
thread specifications becomes confusing. To help eliminate some of this confusion, a brief explanation of some of the more widely used thread specifications is
shown below.

Inlet Connections
NGT and NPT Threads

Hand engagement of all

Overall length of all except NGT
Overall length of NGT

The NGT (National Gas Taper) thread is the commonly used valve-to-cylinder connection. The male thread on the valve has about two more threads at the large end
than the NPT in order to provide additional fresh threads if further tightening is necessary. Additionally, the standard 34" NGT valve inlet provides the greater tightness
at the bottom of the valve by making the valve threads slightly straighter than the
standard taper of 34" per foot in NPT connections. In all other respects NPT and
NGT threads are similar.

Outlet Connections
CGA Outlets
The CGA (Compressed Gas Association) outlets are standard for use
with various compressed gases. The relation of one of these outlets to
another is fixed so as to minimize undesirable connections. They have
been so designed to prevent the interchange of connections which may
result in a hazard.

3/8"-18 NPT Thread Connection

This connection also is used for vapor or liquid withdrawal. It has a 38"
diameter thread, and 18 threads per inch, National Pipe Taper Outlet
form.

26

Copper Tubing

CGA 182, or SAE Flare

Nut

Cylinder
Valve
Outlet

This connection assures a leak-tight joining of copper tubing to brass

parts without need for brazing or silver soldering. The common size used
on LP-Gas valves and fittings is 38" SAE (Society of Automotive
Engineers) flare. Although this connection is referred to as a 38", because
38" OD tubing is used, the thread actually measures 58". The specifications are .625 18 UNF 2A RH EXT, which means .625" diameter
thread, 18 threads per inch, Unified Fine Series Class 2 Tolerances, righthand, external thread.

RegO Cylinder & Service Valves

Cylinder Valve Outlet

Nipple
Nut

Nipple
Nut

Cylinder
Valve
Outlet

CGA 555

CGA 510 or POL

CGA 555 is the standard cylinder valve outlet connection for liquid withdrawal of butane and/or propane. Thread specification is .903" 14
NGO LH EXT, which means .903" diameter thread, 14 threads per
inch, National Gas Outlet form, left-hand external thread.

Most widely used in this industry, POL is the common name for the standard CGA 510 connection. Thread specification is .885" 14 NGO LH
INT, meaning .885" diameter thread, 14 threads per inch, National Gas
Outlet form, left-hand internal thread. ECII POL outlet connections for
LP-Gases conform to this standard.

1516" Female ACME Right Hand

Quick Connect
Back Check Assembly
M.POL, CGA 510

Type I Outlet
This connection is designed to mate with either a 1516" Female ACME or
a Male POL (CGA510). It complies with the ANSI Z21.58 Standard for
Outdoor Cooking Appliances and the Can/CGA-1.6 Standard for
Container Connections. A back check assembly in the outlet is designed
to prevent gas flow until a leak free connection is made with an inlet
adapter. These standards apply to barbecue grill cylinders manufactured
after October 1994.

Back Check Assembly

Type II Outlet
This connection is designed to mate with the Quick Connect Male plug
that complies with the ANSI Z21.58 Standard for Outdoor Cooking
Appliances and the Can/CGA-1.6 Standard for Container connections. A
back check assembly in the outlet is designed to prevent gas flow until a
leak free connection is made with an inlet adapter. These standards
apply to barbecue grill cylinders manufactured after October 1994.

Cylinder and Service Valves

General Information

Heavy-Duty Valve Stem Seals

The wide acceptance of ECII/RegO Cylinder Valves is based on their

reliable performance as well as their reputation for engineering and manufacturing excellence. Together with thorough testing, these efforts result
in years of trouble-free service.

ECII/RegO Cylinder Valves utilize seat discs and stem seals which resist
deterioration and provide the kind of reliable service required for LP-Gas utilization. Diaphragm or O-Ring stem seals are available.

ECII/RegO Cylinder Valves are listed by Underwriters Laboratories and

approved by the Bureau of Explosives for pressure relief valve operation,
wherever applicable. See section on relief valves for important information.

Reliability
ECII/RegO Cylinder Valves are built with attention to each detail:
Beginning with comprehensive inspection of forgings and machined
parts, and ending with intense quality testing on each individual valve
prior to shipment. Every valve must pass a stringent and comprehensive underwater leakage test.
Additionally, valves with pressure reliefs are tested for proper pressure and operation, including reseating to ensure proper opening
and closing at required pressures. Those equipped with excess flow
checks are tested for compliance with published closing specifications, and tested to ensure minimum leakage after closing.

Instructions for the Proper Use and Applications

of ECII/RegO Cylinder Valves
1. Containers and pipe line should be cleaned thoroughly before
valves are installed. Large particles of solid foreign matter can cut
the seating surface of any resilient seat disc, causing the valve to
leak. Care must be exercised in inserting valves into lines or containers to avoid damaging or exerting pressure against pressure
relief valves and outlet connections. Use a minimum amount of a
suitable luting compound on the cylinder valve threads only.
Excess amounts of luting compound can foul the operating parts
of the valves.

Valves with diaphragm stem seals are recognized for their heavy-duty body
design and are suitable for use in cylinders up to 200 lbs. propane capacity.
O-Ring type stem seals are the most widely accepted in the industry. The simple, economical and long life design features a tapered and confined nylon
seat disc which provides positive, hand-tight closings, and a faster filling cylinder valve.

Pressure Relief
ECII/RegO Valves have full-capacity pop action pressure reliefs with
start to discharge settings at 375 PSIG.
A Valve for Every Need
ECII/RegO Cylinder Valves are available for all LP-Gas services; a wide
choice for domestic, commercial, industrial, RV, motor fuel, and lift truck
applications. Valves are available with a combination of such options as
pressure reliefs, liquid level gauges, and liquid withdrawal tubes.
Also available for special applications are plumbers pot valves, tamperresistant valves for field service, and dual valves for simultaneous liquid
and vapor service.

2. Do not use excessive force in opening or closing the valves. The

seat disc and diaphragm materials permit the valves to be opened
and closed easily by hand. Never use a wrench on wheel handle
valves.
3. When the design of the piping installation allows liquid to be locked
between two valves, a hydrostatic relief valve must be installed in
the line between the two valves. The pressures which can develop
due to temperature increase in a liquid full line are tremendous and
can cause rupture of the line or damage to the valves.
4. The valves are designed to withstand normal atmospheric temperatures. They should not, however, be subjected to abnormally high
temperatures.
27

RegO Cylinder & Service Valves

Design Features of ECII and RegO Cylinder Valves
Back Seat On 901, 9101 and 9103
Valves
Is metal-to-metal seating to provide
added protection against leakage while
the valve is open. Back seat the valve
while in operation.

Valve Stems On 901, 9101

and 9103 Valves

Are machined with a double lead
thread for quick opening and closing as well as high lift.

O-Rings
For positive leak-proof seals under
temperature and pressure variations.

Forged Brass Body

Pressure Relief
Provides quick discharge of excess
pressure. Relief seat disc is special
resilient composition rubber.
Seat Disc
Is a tapered nylon in a fully confined seat
to ensure easy, leak-free, positive shutoffs. Seat disc also provides a separate
swivel action to minimize scoring by
impurities.

Tapered Seat Openings

On 9101 and 9103 Valves
Permit increased flow rates
resulting in faster charging.

Compact Cylinder Valves with

Overfilling Prevention Devices

The 907NFD Series Cylinder Valves are designed for use

on DOT LP-Gas Cylinders up to 40 lbs. The outlet features a back check assembly designed to prevent gas
flow until a leak free connection is made with an inlet
adapter.
These valves comply with both the ANSI Z21.58
Standard for Outdoor Cooking Appliances and the
CAN/CGA-1.6 Standard for Container Connections
which apply to new barbecue grill cylinders manufactured after October 1994. They also conform to requirements in the 1998 edition of NFPA 58.

907NFD Series
Type I Valves

Ordering Information
Part
Number

Dip Tube
Length with
Deflector

For use on
DOT Cylinders
Up To:

907NFD3.0

3.0"

5 lbs.

907NFD4.0

4.0"

20 lbs.

907NFD4.8

4.8"

30 lbs.

907NFD6.5

6.5"

40 lbs.

Service Connection
Container
Connection

34

" M. NGT

Type

Description

Type I

1516" M. ACME
and F. POL
CGA 791

Fixed Liquid
Level Vent
Valve Style

Pressure
Relief
Valve Setting

Slotted

375 PSIG

Accessories
ACME Dust
Cap

907-12
Included

Always check Diptube length to assure accuracy of fixed liquid level. Cylinders should be filled by weight. Check all authorities having jurisdiction.

28

RegO Cylinder & Service Valves

Heavy-Duty Cylinder Valves for Vapor Withdrawal
This heavy duty cylinder valve is designed for vapor withdrawal of DOT cylinders up to 100
lbs. propane capacity. It is used in domestic hook-ups, with RV's and as a heavy duty barbecue cylinder valve.
9103D

Part
Number

Container
Connection

Service
Connection

Fixed
Liquid
Level
Vent Valve
Style

9103D04.2

34"
M. NGT

F. POL
(CGA 510)

Knurled

9103D10.6

Dip
Tube
Length
w/Deflector

Pressure
Relief
Valve
Setting

4.2"
10.6"

375
PSIG

9103D11.6

Approximate Filling Rate

Liquid Flow, GPM

Accessories

For Use In
Cylinders
w/Propane
Capacity
Up To:

10
PSIG

25
PSIG

50
PSIG

100
PSIG

POL
Plug

100 lbs.

12.7

20.3

29.0

41.3

970EZP

Pressure Drop Across Valves

11.6"

Cylinder Valve for RV and Small ASME System Vapor Withdrawal

Designed especially for vapor withdrawal service in small ASME containers with surface
area up to 23.8 square feet. UL flow capacity is 645 CFM/air, per NFPA 58.

Part
Number

Container
Connection

Service
Connection

9106CO

34"
M. NGT

F. POL
(CGA 510)

Fixed
Liquid
Level
Vent Valve
Style

Pressure
Relief
Valve
Setting

For Use In
Cylinders
w/Propane
Capacity
Up To:

312
PSIG

ASME
Tanks*

None

Flow
Capacity
SCFM/Air
645

* Surface area up to 23.8 square feet.

Cylinder Valve for Liquid Withdrawal

Equipped with excess flow valves and liquid withdrawal tubes, they are designed for liquid withdrawal of DOT cylinders
up to 100 lbs. propane capacity. They are most often used with heavy BTU loads found in industrial uses.

Part
Number

Container
Connection

Service
Connection

Fixed
Liquid
Level
Vent Valve
Style

9107K8A

34"
M. NGT

CGA 555

Knurled

Pressure
Relief
Valve
Setting

For Use In
Cylinders
w/Propane
Capacity
Up To:

375
PSIG

100
lbs.

Dip Tube
Length
w/Deflector

Liquid
Withdrawal
Tube
Length

11.6"

44"

Closing Flow (LP-Gas)*

Vapor

Approximate Filling Rate

Liquid Flow, GPM
Pressure Drop Across Valve
10
PSIG

25
PSIG

50
PSIG

100
PSIG

3.3

5.4

7.7

11.1

25
PSIG
Inlet

100
PSIG
Inlet

Liquid

525
SCFH

1,000
SCFH

1.7
GPM

*Closing flows based on 38" O.D. withdrawal tube 44" long or less attached.
IMPORTANT: 14" O.D. pigtails or POL connections for 14" O.D. pigtails should not be used with these valves.
NOTES: To ensure proper functioning and maximum protection from excess flow valves, the cylinder valve should be fully opened and backseated
when in use. These valves incorporate an excess flow valve. Refer to L-500 / Section F, for complete information regarding selection, operation and
testing of excess flow valves.

29

RegO Cylinder & Service Valves

Dual Cylinder Valve for Simultaneous Liquid and Vapor Withdrawal
This dual cylinder valve was designed especially for industrial uses. It
increases the cylinders flexibility by permitting DOT cylinders up to 100
lbs. propane capacity to be used interchangeably or simultaneously for
either liquid or vapor withdrawal.

Service
Connection
Part
Number
8556

Container
Connection
34

" M. NGT

Pressure
Relief
Valve
Setting

For Use In
Cylinders
w/Propane
Capacity
Up To:

375
PSIG

100
lbs.

Vapor

Liquid

F. POL
(CGA 510)

CGA
555

Fixed
Liquid
Level
Vent Valve
Style

Liquid
Withdrawal
Tube
Length

None

44"

Approximate Filling Rate

Liquid Flow, GPM
Pressure Drop Across Valve
10
25
50
100
PSIG
PSIG
PSIG
PSIG
6.6

10.0

14.5

Liquid
Closing
Flow*
(LP-Gas)

21.0

2.3
GPM

* To ensure proper functioning and maximum protection from integral excess flow valves, the cylinder valve
should be fully opened and backseated when in use.
NOTE: These valves incorporate an excess flow valve. Refer to L-500/Section F, for complete information
regarding selection, operation and testing of excess flow valves.

Saf-T-Lock For POL Service Valves

Securely locks POL service valves to help prevent unauthorized hookups,
reduces pilferage and increases security.

Part #

Description

510

Saf-T-Lock

510-K

Saf-T-Lock Key

30

RegO Cylinder & Service Valves

Service Valves for ASME and DOT Containers or Fuel Line Applications
Designed especially for vapor withdrawal service on ASME and DOT
containers or in fuel line applications. Since none of these valves have an
integral pressure relief valve, they may only be used as an accessory
valve on containers that have an independent pressure relief valve sufficient for that containers capacity.

9101R1

901C1

9101D

Approximate Filling Rate

Liquid Flow, GPM

Part
Number

Bonnet
Style

Container
Connection

Fixed
Liquid
Level
Vent Valve

Service
Connection

901C1

Pressure Drop Across Valve

No

9101C1

Standard

9101D11.1

Yes

F. POL
CGA 510

34

" M. NGT

9101D11.7
9101R1

10
PSIG
5.3

25
PSIG
8.2

50
PSIG
10.8

100
PSIG
14.2

8.8

12.4

15.8

21.7

8.6

12.7

16.3

22.3

7.6

11.7

15.2

20.6

No
MultiBonnet

9101R11.1

Yes

9101R11.7

NOTE: Since these valves have no integral pressure relief valve, they can be used on any container with an independent relief device sufficient for that tanks capacity.

Service Valves for ASME Motor Fuel Containers

Designed specifically for vapor or liquid withdrawal service on ASME
motor fuel containers. Since none of these valves have an integral pressure relief valve, they may only be used as an accessory valve on containers that have an independent pressure relief valve sufficient for that
containers capacity.
The integral excess flow valve found in all these service valves helps prevent excessive product loss in the event of fuel line rupture.
When installed for liquid withdrawal, the 9101H6 has provisions for
attachment of a liquid withdrawal tube. All other valves must be installed
in containers that have provisions for a separate liquid withdrawal.
To insure proper functioning and maximum protection from integral
excess flow valves, these service valves should be fully opened and
backseated when in use.

Part
Number
901C3
901C5
9101H5*
9101H6*
9101Y5H*
*
**
***
****

Container
Connection

34

" M. NGT

Service
Connection

Liquid
Withdrawal
Connection

F. POL
CGA 510

None

38

" SAE Flare

60 Angle
" SAE Flare

38

901C5

9101H6

Closing Flow (LP-Gas)

Vapor
Liquid
GPM

" NPT

25 PSIG
Inlet (SCFH)
350 ***
550 ***
765 **
550 ****

100 PSIG
Inlet (SCFH)
605 ***
1050 ***
1300 **
1050 ****

3.6 **
2.6 ****

None

550 **

1050 **

3.6 **

14

9101H5

2.6 ***

Heavy-duty models
Based on 38" O.D. pigtail, 20" long or less, connected to valve outlet. For greater lengths, the pigtail must have a larger O.D.
Same as (**). In addition, 14" O.D. pigtails or POL connections for 14" O.D. should not be used with this valve.
Based on 38" O.D. pigtail; 20: long or less, connected to valve outlet. Also based on 14" pipe size dip tube, 42" long or less, attached to special inlet
connection. For longer pigtail lengths, the diameter of the pigtail must be increased.

9101Y5H

NOTE: These valves incorporate an excess flow valve. Refer to L-500/Section F, for complete information regarding selection, operation and testing of
excess flow valves.

31

RegO Cylinder & Service Valves

Service Valves for DOT Fork Lift Containers
Designed specifically for vapor or liquid withdrawal service on DOT fork
lift containers. Valves with 1.5 GPM closing flow are for use in small and
medium size lift truck applications, while those with 2.6 GPM closing
flow are for large lift trucks and gantry crane type vehicles. Since none of
these valves have an integral pressure relief valve, they may only be used
as an accessory valve on containers that have an independent pressure
relief valve sufficient for that cylinders capacity.
The integral excess flow valve found in all these service valves helps prevent excessive product loss in the event of fuel line rupture.
When installed for liquid withdrawal, the 9101P6 Series has provisions for attachment of a liquid withdrawal tube. The 9101P5 Series
must be installed in containers that have provisions for a separate
liquid withdrawal.
To insure proper functioning and maximum protection from integral
excess flow valves, these service valves should be fully opened and
backseated when in use.

9101P5
9101P5H

Approximate Filling Rate

Liquid Flow, GPM

Accessories

Pressure Drop Across Valve

ACME Check Connectors

Closing Flow (LP-Gas)

Vapor
Part
Number

Container
Connection

Service
Connection

9101P5
9101P5H
9101P6

Liquid
Withdrawal
Connection

25 PSIG
Inlet (SCFH)

100 PSIG
Inlet (SCFH)

Liquid
(GPM)

430

900

1.5

550

1050

2.6

430

900

1.5

550

1050

2.6

None
34

" M. NGT

38

" M. NPT
14

" NPT

9101P6H

9101P6
9101P6H

10
PSIG

25
PSIG

50
PSIG

100
PSIG

5.0

7.6

10.7

14.9

4.5

7.2

10.3

Male

Female

Cap

7141M

7141F

7141M-40
or
7141FP

14.8

NOTE: These valves incorporate an excess flow valve. Refer to L-500/Section F, for complete information regarding selection, operation and testing of excess flow valves.

Adhesive Warning Labels

These adhesive warning labels are intended for application as close as possible to the cylinder valve
and/or service valve.

Part
Number

Description

901-400

Adhesive Label Primarily for Fork Lift

Cylinders

903-400

Adhesive Label Primarily for Small DOT

Cylinders

DANGER

LP GAS IS EXTREMELY FLAMMABLE AND EXPLOSIVE

WARNING

AVOID SERIOUS INJURY AND PROPERTY DAMAGE. IF YOU SEE, SMELL, OR HEAR ESCAPING GAS...EVACUATE AREA
IMMEDIATELY! CALL YOUR LOCAL FIRE DEPARTMENT! DO NOT ATTEMPT TO REPAIR. DO NOT STORE IN BUILDING OR
ENCLOSED AREA. DO NOT USE ON HOT AIR BALLOONS OR AIRCRAFT.
This container is filled with highly flammable LP-Gas under pressure. A
serious fire or explosion can result from leaks and misuse or mishandling of
the container and its valves. Do not move, hold or lift the container by any
of its valves. Do not expose to fire or temperature above 120F (49C). Do
not overfill.
This container incorporates a pressure relief valve. The pressure relief valve
can expel a large jet of LP-Gas into the air if the container is (1) exposed to
high temperaturesover 120F (49C) or (2) overfilled and exposed to a
temperature higher than the temperatures at the time it was filled.
The pressure relief valve is equipped with a protective cover. The protective
cover must remain in place at all times except when inspecting the
valve. CAUTION...use eye protection. If dust, dirt, moisture or other foreign
material collect in the valve, it may not function properly to prevent container
rupture or minimize product loss after opening.
Each time the container is filled, the pressure relief valve must be checked
to ensure that it is completely unobstructed and that it has no physical
damage. If there is any doubt about the condition of the valve, the container
must be removed from service and the pressure relief valve must be
replaced.
Only trained personnel should be permitted to fill this container. Before the
container is filled for the first time, it must be purged of air. The total liquid
volume of LP-Gas must never exceed the amount designated by
applicable filling density regulations for this container.
Make sure the protective cap is in place on the ACME threaded filler valve
at all times. Never insert a screwdriver or other tools into the valve as it can
damage the seal or guide and cause an uncontrolled leak.

Do not allow any overfill. If the fixed liquid level gauge is used during filling, filling
should stop the moment a white LP-Gas cloud is emitted from its bleed hole.
Keep the vent closed tightly at all other times. Each time the container is filled,
it must be checked for leaks (with a high quality leak detection solution...leaks
cause bubbles to grow).
Do not disconnect or connect this container without first reading the instructions
accompanying the vehicle or appliance with which this container is intended to
be used. CAUTION...no smoking while connecting or disconnecting this
container.
Make sure the service valve is shut off tightly before beginning to assemble or
disassemble the coupling. Liquid LP-Gas may flow or leak from the coupling.
This liquid can cause skin burns, frost bite and other serious injury in addition to
those caused by fire and explosion. CAUTION...Wear proper skin and eye
protection. Any gasket or O-ring in the coupling must be routinely checked for
wear and replaced as required.
After connecting the coupling, make sure the connection is leak tight. Check for
leaks with a high quality leak detection solution (leaks cause bubbles to grow).
If the connection leaks after tightening, close the service valve, disconnect the
coupling and remove from service.
When not in use, keep the service shut-off valve closed.
When in use, keep the service valve fully open.
Keep this equipment out of the reach of children.
This container must be used only in compliance with all applicable laws and
regulations, including National Fire Protection Association Publication No. 58,
which is the law in many states. A copy of this Publication may be obtained by
writing NFPA, Batterymarch Park, Quincy, MA 02269.

DO NOT REMOVE, DEFACE OR OBLITERATE THIS LABELDO NOT FILL THIS CONTAINER UNLESS THIS LABEL IS READABLE.
ADDITIONAL SAFETY INFORMATION
IS AVAILABLE FROM:

Engineered Controls
International, Inc.

100 RegO Drive PO Box 247 Elon College, NC 27244 USA

DANGER!

LP-GAS IS EXTREMELY FLAMMABLE AND EXPLOSIVE

KEEP CYLINDER OUT OF THE REACH OF CHILDREN

Printed in U.S.A. 04-0994-1189

Phone (336) 449-7707 Fax (336) 449-6594

WARNING!

AVOID SERIOUS INJURY AND PROPERTY DAMAGE. IF YOU SEE, SMELL, OR HEAR THE HISS OF ESCAPING GAS...IMMEDIATELY GET AWAY FROM THIS CYLINDER! CALL YOUR
LOCAL FIRE DEPARTMENT! DO NOT ATTEMPT TO REPAIR. DO NOT USE OR STORE IN BUILDING OR ENCLOSED AREA. FOR OUTDOOR USE ONLY.
WHEN MAKING CONNECTIONS TO AN APPLIANCE
CAUTION...eye protection must be worn when examining relief valve. This
This cylinder contains highly flammable LP-Gas under pressure. A serious
fire or explosion can result from leaks and misuse or mishandling of the
1. Do not use this cylinder without first reading the instructions accompavalve cannot be repaired. If it is obstructed, the entire cylinder valve must be
cylinder and its valve. Do not carry, hold or lift the cylinder by its valve.
nying the appliance with which this cylinder is intended to be used.
replaced. The Shut-Off Valve may require periodic repair or replacement.
Do not expose to fire or temperatures above 120F (49C).
2. Before connecting the Cylinder Valve outlet connection to an appliBefore the cylinder is filled for the first time, it must be purged of air.
The cylinder valve incorporates a Shut-Off Valve and Pressure Relief Valve.
ance, make sure the connection does not contain dirt or debris. These
Total liquid volume must never exceed the amount designated by DOT
The Pressure-Relief Valve can expel a large jet of LP-Gas into the air if the
may cause the connection to leak or may impair the functioning of the
for this cylinder.
cylinder is (1) exposed to high temperatures over 120F (49 C.), or (2)
regulator, creating a hazardous condition.
If the cylinder has a fixed liquid level gauge, filling should stop the
overfilled and exposed to a temperature higher than the temperature at the
3. When connecting the Cylinder Valve outlet to an appliance
moment a white LP-Gas cloud is emitted from its bleed hole. Keep the
time it was filled.
(CAUTION...counterclockwise thread), make sure the connection is
vent valve closed tightly at all other times.
Never attempt to fill this cylinder yourself. Do not tamper with it or
tight. Check for leaks with a high quality leak detection solution (leaks
Keep this cylinder firmly secured in an upright position at all times. Do
attempt repairs.
cause bubbles to grow). If the connection leaks after tightening, close
not lay it on its side during transport, storage or use. In other than an upright
cylinder valve, disconnect it from the appliance, insert the P.O.L. plug
Only trained LP-Gas Dealer personnel should be permitted to fill this
position, liquid LP-Gas may flow or leak. This liquid can cause skin burns,
and immediately return the cylinder, with the Cylinder Valve attached,
cylinder and to repair or replace its valve. Each time the cylinder is
frostbite and other serious injuries in addition to those caused by fire or
to your LP-Gas Dealer for examination.
filled, the entire cylinder valve must be checked for leaks (with a leak
explosion.
detection solution...leaks cause bubbles to grow). The shut-off valve
This cylinder must be used only in compliance with all applicable laws and
When not in use: Close the Shut-Off Valve. Insert a protective plug (P.O.L.
and fixed liquid level gauge (if incorporated) must be checked for
regulations, including National Fire Protection Association Publication No.
plug) into the cylinder valve outlet. (CAUTION...counterclockwise thread).
proper operation. The Pressure-Relief Valve must be checked to ensure
58, which is the law in many states. A copy of this Publication may be
The P.O.L. plug must be inserted whenever the cylinder is stored, manually
that it is completely unobstructed and that it has no physical damage.
obtained by writing NFPA, Batterymarch Park, Quincy, MA 02269.
moved, or transported by vehicle.
ADDITIONAL SAFETY INFORMATION
IS AVAILABLE FROM:

32

DO NOT REMOVE, DEFACE OR OBLITERATE THIS LABELDO NOT FILL THIS CYLINDER UNLESS THIS LABEL IS READABLE.
100 RegO Drive PO Box 247 Elon College, NC 27244 USA
Phone (336) 449-7707 Fax (336) 449-6594 www.regoproducts.com

Printed in U.S.A. 05-0994-1086

Warning No. 903-400

Part No. 901-400

www.regoproducts.c om

RegO MultiValve Assemblies

RegO Multivalve Assemblies
General Information
RegO Multivalves were pioneered in the 1930s. By combining several
valve functions in one unit, Multivalves made possible new and more
practical tank designs (fewer openings and smaller, less cumbersome
protective hoods). They received immediate acceptance.
The Multivalve design has kept pace with changing industry needs over
the years. They are as popular as ever; still keeping fabricating costs
down and reducing operating expenses for the LP-Gas dealer.
RegO Multivalves Reduce the Cost of Fabrication by
Combining several valve functions in one less expensive body.
Reducing the number of threaded openings in ASME containers.
Diminishing the size and cost of protective hoods.
Providing generous sized wrenching bosses for quick, easy
installation.
RegO Multivalves Reduce LPG Dealer Expenses by
Permitting on-site filling of 100 lb. to 420 lb. DOT cylinders, thus
eliminating cylinder return and interrupted customer service.
Providing well-placed hose connections for easy filling.
Allowing ample space for secure attachment and easy removal of
the regulator.
Providing substantial savings of bonnet repairs on valves with the
MultiBonnet.
RegO Multivalves Satisfy Customer Demands for Tough, Safe
Equipment with These Features
Heavy-Duty Valve Stem Seals
Tapered nylon disc in a fully confined seat resist deterioration and provide hand-tight closings over a long service life.

Comprehensive Testing
Every Multivalve must pass a stringent underwater leakage test prior
to shipment.
Multivalves with pressure relief valves are individually tested and
adjusted to assure proper pressure settings.
Those equipped with excess flow checks are tested for compliance
with published closing specifications and for leakage after closing.
Pressure Relief Valves and Other Devices
Multivalves equipped with integral pressure relief devices employ
full-capacity, pop-action reliefs with set pressures of 250 psig for
ASME use and 375 psig for DOT cylinders.
Double Back-Check Filler Valves
Multivalves with filling connections have double backcheck safety. If
the upper check ceases to function, the lower stand-by check will
continue to protect the filling connection from excessive leakage.
Ease of Maintenance
Standardization of parts makes it possible for one repair kit to maintain the bonnet assemblies of RegO cylinder valves, service valves,
motor fuel valves, and Multivalves.
RegO Multivalves fit every LP-Gas need.

Wide selection of Multivalves for domestic, commercial, and industrial needs are available.
Multivalves may be ordered with pressure relief, liquid level tube,
filler valve, vapor equalizing valve, internal pipe connections, liquid
filling and withdrawal connections, and 14" NPT tapped opening for
pressure gauge with or without steel plug.

Design Features of RegO Multivalves

Seal Cap
Molded from tough, resilient
plastic to protect threads
and internal working parts.
Designed to protect the filler
opening against dirt and other
foreign materials. Also acts
as a secondary pressure seal.
Long Wearing Gasket
Permits leak-free, hand-tight
connection of the hose
coupling to the filler valve.
Forged Brass Body

MultiBonnet
Designed to allow quick and
easy repair of bonnet packings on Multivalves on
active propane systems.

UL Shear Point
Provides for a shear just
below the ACME threads to
protect the container in case
of a pullaway while the hose
is connected. The ACME
connection should shear off
on an angle pull, leaving the
body and check assembly of
the valve still in place.
Filler Seat Disc
Fabricated of special
synthetic composition and
made extra thick for
longer life.
Valve Guide
A precision machined stem
to assure positive alignment
Pop Action Pressure Relief
Provides quick release of
excess pressure. Relief seat
disc is special resilient
composition rubber designed
to resist bonding to the
valve seat even after years
of service.

33

RegO MultiValve Assemblies

RegO MultiBonnet Assemblies

Design Features of the MultiBonnet

Handwheel
Aluminum die cast handwheel.
Non-Rising Stem
Designed to allow easy backseating and long
service life.
Upper Packing Assembly
Contains both internal and external o-rings.
Provides leak resistant performance.
Internal O-ring
Lower Bonnet and Stem Assembly
Machined brass construction offers durability to
bonnet design.
External O-ring
Nameplate
Provides easy identification of the RegO
MultiBonnet.
Teflon Backseat
Provides for upper packing isolation when valve
is fully open.
Machined Double Lead Threads
Provides for quick opening and closing of the
valve.
Shut-off Seat Disc
Tapered nylon disc is retained in a fully confined
seat that helps ensure positive shut-offs.

Application
The MultiBonnet is designed to allow quick and easy repair of bonnet
packings in certain Multivalves and service valves on active propane
systems. It allows you to repair valve bonnet stem o-ring leaks in minutes, without interrupting gas service to your customers.
Eliminates the need to evacuate tanks or cylinders to repair the
MultiBonnet packing.
Two section design allows repair of MultiBonnet assemblies on
active propane systems without interruption in gas service or shutting
off appliances downstream. This helps to prevent time consuming
relighting of pilots, special appointments, and call backs.
Cost of replacing the MultiBonnet packing is only 1/3 as much as

34

replacing a complete bonnet assemblynot including time cost savings, which can be substantial.
Available on certain new Multivalves and service valves as well as
repair assemblies for many existing RegO valves.
UL listed as a component of valve assembly.

Heres How The MultiBonnet Works

When the valve is fully open, only the lower stem will rise and backseat against the teflon washer which isolates the upper packing.
This allows you to remove the upper packing nut, which contains the
o-rings, and replace it while the valve is fully open and gas service not
interrupted.

RegO MultiValve Assemblies

ASME Multivalves for Vapor Withdrawal
R V- M V 3 1 3 1 G
RW- M V 3 1 3 2 G
These Multivalves are designed for use in single opening ASME containers equipped with a 212" M. NPT riser. They can be used with underground ASME containers up to 639 sq. ft. surface area, and above
ground ASME containers up to 192 sq. ft. surface area. A separate
opening is required for liquid withdrawal. The MultiBonnet is standard on
this valve. The MultiBonnet allows quick and easy repair of bonnet.
8475-50
(8475-80 w/out body)

Approximate Filling Rate

Liquid Flow, GPM
Pressure Drop Across Valve
Part
Number

8475-51A
(8475-81A w/out body)

10
PSIG

25
PSIG

50
PSIG

100
PSIG

42

72

98

125

19104-80

G8475RV
G8475RW

Vapor Equalizing
Connection
Part
Number

Container
Service
Filling
Connection
Connection Connection Connection
Size

Float
Gauge
Flange
Opening

UL Listed
Closing
Flow

Fixed
Pressure
Liquid
Relief
Dip
UL Listed
Level
Valve Relief Valve
Vent Valve Tube
Length Setting
Capacity
Style
2020
SCFM/air

G8475RV
2 12"
F. NPT

134"
M. ACME

F. POL
(CGA 510)

114"
M. ACME

4200 CFH
@ 100 PSIG

Fits
JUNIOR
Size

Knurled

30"*

250
PSIG
3995
SCFM/air

G8475RW

Accessories
For Use In
Containers
w/Surface
Area Up To:

Filler Valve
Wrench

83 sq. ft.
Above ground
276 sq. ft.
Underground

M7835

192 sq. ft.

Above ground
639 sq. ft.
Underground

* Dip tube not installed, may be cut by customer to desired length.

ASME Multivalves for Vapor Withdrawal

These Multivalves provide vapor withdrawal and filling of ASME containers. A separate pressure relief valve is required in addition to this
valve. The MultiBonnet is standard on this valve. MultiBonnet allows
quick and easy repair of bonnet.

Approximate Filling Rate

Liquid Flow, GPM
Pressure Drop Across Valve
Part
Number

10
PSIG

25
PSIG

50
PSIG

100
PSIG

8593AR16.0

42

72

98

125

Vapor Equalizing
Connection
Part
Number

Container
Connection

Service
Connection

Filling
Connection

Connection
Size

8593AR16.0

112"
M. NPT

F. POL
(CGA 510)

134"
M. ACME

114"
M. ACME

UL Listed
Closing
Flow
4200 CFH
at 100
PSIG

Fixed
Liquid
Level
Vent Valve
Style

Dip
Tube
Length

For Use In
Containers
w/Surface
Area Up To:

Knurled

16"*

**

* Dip tube not installed, may be cut by customer to desired length.

** Since these Multivalves have no integral pressure relief valves, they can be used on any ASME container with an independent
relief device sufficient for that tanks capacity.

35

RegO MultiValve Assemblies

DOT Multivalve for Liquid Withdrawal
These Multivalves permit liquid withdrawal from DOT cylinders with up
to 100 lbs. propane capacity. They eliminate unnecessary cylinder handling when servicing high volume loads and allow on-site filling into the
vapor space without interrupting gas service.

Approximate Filling Rate

Liquid Flow, GPM
Pressure Drop Across Valve
Part
Number

10
PSIG

25
PSIG

50
PSIG

100
PSIG

8555DL11.6

23

34

42

Part
Number

Container
Connection

Service
Connection

Filling
Connection

8555DL11.6

34"
M. NGT

CGA
555*

134"
M. ACME

Fixed
Liquid Level
Vent Valve
Style

Dip Tube
Length
w/Deflector

Liquid
Withdrawal
Tube
Length

Pressure
Relief
Valve
Setting

For Use In
Cylinders
w/Propane
Capacity Up To:

Liquid Closing
Flow
(LP-Gas)***

Knurled

11.6"

44"

375
PSIG

100 lbs.**

1.7 GPM

* Use adapter 12982 to connect to pipe threads.

** Per CGA Pamphlet S-1.1.
*** To ensure proper functioning and maximum protection from integral excess flow valves, the cylinder valve should be fully opened and backseated when in use.

DOT Multivalves for Vapor Withdrawal

These Multivalves permit vapor withdrawal from DOT cylinders with up
to 200 lbs. propane capacity. They allow on-site cylinder filling without
interrupting gas service. The MultiBonnet option allows quick and easy
repair of bonnet.

Part
Number
8555D Series
8555R Series

10
PSIG
8

Part
Number

Bonnet
Style

6555R10.6

MultiBonnet

6555R11.6

MultiBonnet

6555R12.0

MultiBonnet
Standard

8555R10.6

MultiBonnet

8555D11.6

Standard

8555R11.6

MultiBonnet

* Per CGA Pamphlet S-1.1.

23

Application

8555D10.6

36

Approximate Filling Rate

Liquid Flow, GPM
Pressure Drop Across Valve
25
50
PSIG
PSIG

ASME
Containers

DOT
Cylinders

34

100
PSIG
42

For Use In
Containers
with size
Up To:

Dip
Tube
Length
w/Deflector

25 ft2 surface
area or
60 gallons
water capacity

10.6"

200 lbs.
Propane
**

Container
Connection

Service
Connection

Filling
Connection

Fixed
Liquid
Level
Vent Valve
Style

11.6"

Pressure Relief Valve

Flow Capacity*
Setting

UL Listing

ASME

250
PSIG

793
SCFM, air

700
SCFM, air

375
PSIG

n/a

n/a

12.0"
10.6"

11.6"

34"
M. NGT

F. POL
(CGA 510)

134"
M. ACME

Knurled

RegO MultiValve Assemblies

DOT and ASME Multivalves for Vapor Withdrawal
These Multivalves permit vapor withdrawal from ASME containers up to
50 sq. ft. surface area and DOT containers up to 420 lbs. propane
capacity. They allow on-site cylinder filling without interrupting gas service. The MultiBonnet option allows quick and easy repair of bonnet.

Approximate Filling Rate -- Liquid Flow, GPM

Pressure Drop Across Valve
Part
Number
6532A12.0 / 6532R12.0
6542A12.0 / 6542R12.0
6533A10.5 / 6533R10.5
6533A11.7 / 6533R11.7
6543A11.1 / 6543R11.1
6543A11.7 / 6543R11.7

Part
Number

Bonnet
Style

6532A12.0

Standard

6532R12.0

MultiBonnet

6542A12.0

Standard

6542R12.0

MultiBonnet

6533A10.5

Standard

6533R10.5

MultiBonnet

6533A11.7

Standard

6533R11.7

MultiBonnet

6543A11.1

Standard

10
PSIG
11
23

25
PSIG
16
32

50
PSIG
23
46

100
PSIG
28
57

11

16

23

28

23

32

46

57

Application

Container
Connection

Service
Connection

Filling
Connection

Fixed
Liquid
Level
Vent Valve
Style

Dip Tube
Length
with
Deflector

Pressure
Relief
Valve
Setting

12.0"

250
PSIG

For Use In For Use In

Cylinders Containers
w/Propane w/Surface
Capacity
Area
Up To:**
Up To:***

34

" M. NGT

43 sq. ft.

ASME*

1" M. NGT

53 sq. ft.
10.5"

34

" M. NGT

F. POL
(CGA 510)

134"
M. ACME

Knurled
11.7"
375
PSIG

DOT

420 lbs.
Propane

11.1"

6543R11.1

MultiBonnet
1" M. NGT
6543A11.7
Standard

6543R11.7
MultiBonnet
* UL rated flow capacities are: 6532A12.0-1180 SCFM/air, 6542A12.0-1530 SCFM/air.
** Per CGA Pamphlet S-1.1.
*** From NFPA, Appendix D.

11.7"

ASME Multivalves for Vapor Withdrawal

These compact Multivalves are especially suited for vapor withdrawal of
ASME containers where compact groupings of components are necessary. Separate filler valves and pressure relief valves are required.
MultiBonnet allows quick and easy repair of bonnet.

Vapor Equalizing
Connection
Part
Number

7556R12.0
7556ZT12.0

Container
Connection

34

" M. NGT

34

" M. NPS**

Service
Connection

F. POL
(CGA 510)

Connection
Size

UL Listed
Closing
Flow

114"
M. ACME

4200 CFH
@100 PSIG

Fixed
Liquid
Level
Vent Valve
Style

Dip
Tube
Length

For Use In
Containers
w/Surface
Area
Up To:

Knurled

12"

* Since these Multivalves have no integral pressure relief valves, they can be used on any ASME
container with an independent relief device sufficient for that tanks capacity.
**National Pipe Straight

37

RegO Pressure Relief Valves & Relief Valve Manifolds

ECII Safety Warning LP-Gas Pressure Relief Valves
Purpose
In its continuing quest for safety, Engineered Controls International,
Inc. is publishing safety warning bulletins explaining the hazards associated with the use, misuse and aging of ECII/ RegO Products. LPGas dealer managers and service personnel must realize that the failure to exercise the utmost care and attention in the installation, inspection and maintenance of these products can result in personal injury
and property damage.
The National Fire Protection Association Pamphlet #58 Storage and
Handling of Liquefied Petroleum Gases states: In the interests of
safety, all persons employed in handling LP-Gases shall be trained in
proper handling and operating procedures. ECII Warning Bulletins
are useful in training new employees and reminding older employees
of potential hazards.
This Warning Bulletin should be provided to all purchasers of ECII /
RegO Products and all personnel using or servicing these products.
Additional copies are available from Engineered Controls International,
Inc. and your Authorized ECII/ RegO Products Distributor.

What You Must Do:

Read This Entire Warning
Install Properly
Inspect Regularly
Replace In 10 Years or Less

Scope
This bulletin applies to pressure relief valves installed on stationary,
portable and cargo containers and piping systems utilized with these
containers. This bulletin is not intended to be an exhaustive treatment
of this subject and does not cover all safety practices that should be
followed in the installation and maintenance of LP-Gas systems. Each
LP-Gas employee should be provided with a copy of NPGA Safety
Pamphlet 306 LP-Gas Regulator and Valve Inspection and
Maintenance as well as the NPGA LP-Gas Training Guidebooks
relating to this subject.

Warnings should be as brief as possible. If there is a simple warning, it is:

Install Properly

Pipeaways and deflectors may be required by local codes, laws

and regulations depending on the installation. Use only ECII /
RegO adapters on ECII / RegO relief valves. Adapters not
designed specifically for piping away ECII/ RegO relief valves, such
as those with 90 turns or reduced internal diameters, will decrease
flow dramatically. These should never be used as they can cause the
relief valve to chatter and eventually destroy itself.

Consult NFPA Pamphlet #58 and/or any applicable regulations governing the application and use of pressure relief
valves. Make sure you are thoroughly trained before you
attempt any valve installation, inspection or maintenance.

Proper installation is essential to the safe operation of pressure relief

valves. When installing ECII/ RegO pressure relief valves, consult
warning # 8545-500 which accompanies each valve. Check for damage and proper operation after valve installation. Check that the valve
is clean and free of foreign material.

Inspect Regularly
A pressure relief valve discharges when some extraordinary circumstance causes an over pressure condition in the container. If a
pressure relief valve is known to have discharged, the relief valve,
as well as the entire system, should be immediately and thoroughly inspected to determine the reason for the discharge. In the
case of discharge due to fire, the valve should be removed from
service and replaced.

38

Inspect pressure relief valves regularly. Replace unsafe or suspect valves immediately. Use common sense.

The addition of deflectors, pipeaway adapters and piping will

restrict the flow. To properly protect any container, the total
system flow must be sufficient to relieve pressure at the pressure setting of the relief valve in accordance with all applicable
codes.

Relief valves should be inspected each time the container is

filled but no less than once a year. If there is any doubt about
the condition of the valve, it must be replaced.
Eye protection must be worn when performing inspection on relief
valves under pressure. Never look directly into a relief valve under pressure or place any part of your body where the relief valve discharge
could impact it. In some cases a flashlight and a small mirror are suggested to assist when making visual inspections.

RegO Pressure Relief Valves & Relief Valve Manifolds

To Properly Inspect A Pressure Relief Valve, Check For:
1. A rain cap. Check protective cap located in valve or at end of
pipeaway for a secure fit. Protective caps help protect the relief
valve against possible malfunction caused by rain, sleet, snow, ice,
sand, dirt , pebbles, insects, other debris and contamination.
REPLACE DAMAGED OR MISSING CAPS AT ONCE AND
KEEP A CAP IN PLACE AT ALL TIMES.
2. Open weep holes. Dirt, ice, paint and other foreign particles can
prevent proper drainage from the valve body. IF THE WEEP
HOLES CANNOT BE CLEARED, REPLACE THE VALVE.
3. Deterioration and corrosion on relief valve spring. Exposure to
high concentrations of water, salt, industrial pollutants, chemicals
and roadway contaminants could cause metal parts to fail. IF THE
COATING ON THE RELIEF VALVE SPRING IS CRACKED OR
CHIPPED, REPLACE THE VALVE.
4. Physical damage. Ice accumulations and improper installation
could cause mechanical damage. IF THERE ARE ANY INDICATIONS OF DAMAGE, REPLACE THE VALVE.
5. Tampering or readjustment. Pressure relief valves are factory set
to discharge at specified pressures. IF THERE ARE ANY INDICATIONS OF TAMPERING OR READJUSTMENT, REPLACE THE
VALVE.
6. Seat leakage. Check for leaks in the seating area using a noncorrosive leak detection solution. REPLACE THE VALVE IF

THERE IS ANY INDICATION OF LEAKAGE. Never force a relief

valve closed and continue to leave it in service. This could result in
damage to the valve and possible rupture of the container or piping
on which the valve is installed.
7. Corrosion and contamination. REPLACE THE VALVE IF THERE
ARE ANY SIGNS OF CORROSION OR CONTAMINATION ON
THE VALVE.
8. Moisture, foreign particles or contaminants in the valve.
Foreign material such as paint, tar or ice in relief valve parts can
impair the proper functioning of the valves. Grease placed in the
valve body may harden over time or collect contaminants, thereby
impairing the proper operation of the relief valve. DO NOT PLACE
GREASE IN THE VALVE BODY, REPLACE THE VALVE IF
THERE ARE ANY INDICATIONS OF MOISTURE OR FOREIGN
MATTER IN THE VALVE.
9. Corrosion or leakage at container connection. Check container to valve connection with a non-corrosive leak detection solution.
REPLACE THE VALVE IF THERE IS ANY INDICATION OF CORROSION OR LEAKAGE AT THE CONNECTION BETWEEN THE
VALVE AND CONTAINER.
CAUTION: Never plug the outlet of a pressure relief valve. Any
device used to stop the flow of a properly operating pressure
relief valve that is venting an overfilled or over pressurized container raises serious safety concerns!

Replace Pressure Relief Valves In 10 Years Or Less

The safe useful life of pressure relief valves can vary greatly depending
on the environment in which they live.
Relief valves are required to function under widely varying conditions.
Corrosion, aging of the resilient seat disc and friction all proceed at different rates depending upon the nature of the specific environment
and application. Gas impurities, product misuse and improper installations can shorten the safe life of a relief valve.
Predicting the safe useful life of a relief valve obviously is not an exact
science. The conditions to which the valve is subjected will vary widely and will determine its useful life. In matters of this kind, only basic
guidelines can be suggested. For example, the Compressed Gas
Association Pamphlet S-1.1 Pressure Relief Device Standards
Cylinders, section 9.1.1 requires all cylinders used in industrial motor
fuel service to have the cylinders pressure relief valves replaced by
new or unused relief valves within twelve years of the date of manufacture of cylinder and within each ten years thereafter. The LP-Gas dealer must observe and determine the safe useful life of relief valves in his
territory. The valve manufacturer can only make recommendations for
the continuing safety of the industry.

RegO Pressure Relief Valves

Requirements for Pressure Relief Valves
Every container used for storing or hauling LP-Gas and anhydrous
ammonia must be protected by a pressure relief valve. These valves
must guard against the development of hazardous conditions which
might be created by any of the following:
Hydrostatic pressures due to overfilling or the trapping of liquid
between two points.

WARNING: Under normal conditions, the useful safe service life

of a pressure relief valve is 10 years from the original date of
manufacture. However, the safe useful life of the valve may be
shortened and replacement required in less than 10 years
depending on the environment in which the valve lives.
Inspection and maintenance of pressure relief valves is very
important. Failure to properly inspect and maintain pressure
relief valves could result in personal injuries or property damage.

For Additional Information Read:

1. CGA Pamphlet S-1.1 Pressure Relief Standards Cylinders,
Section 9.1.1.
2. ECII Catalog L-500.
3. ECII Warning # 8545-500.
4. NPGA Safety Pamphlet 306 LP-Gas Regulator and Valve
Inspection and Maintenance and LP-Gas Training Guidebooks.
5. NFPA # 58, Storage and Handling of Liquefied Petroleum Gases.
6. NFPA # 59, LP-Gases at Utility Gas Plants.
7. ANSI K61.1 Safety Requirements for Storage and Handling of
Anhydrous Ammonia.

High pressures resulting from exposure of the container to excessive external heat.
High pressures due to the use of incorrect fuel.
High pressures due to improper purging of the container.

Consult NFPA Pamphlet #58 for LP-Gas and ANSI #K61.1 for
anhydrous ammonia, and/or any applicable regulations governing the application and use of pressure relief valves.

39

RegO Pressure Relief Valves & Relief Valve Manifolds

Operation of Pressure Relief Valves
Pressure relief valves are set and sealed by the manufacturer to
function at a specific start-to-discharge pressure in accordance
with regulations. This set pressure, marked on the relief valve,
depends on the design requirement of the container to be protected
by the relief valve. If the container pressure reaches the start-to-discharge pressure, the relief valve will open a slight amount as the
seat disc begins to move slightly away from the seat. If the pressure
continues to rise despite the initial discharge through the relief valve,
the seat disc will move to a full open position with a sudden pop.
This sharp popping sound is from which the term pop-action is
derived.
Whether the relief valve opens a slight amount or pops wide open, it
will start to close if the pressure in the container diminishes. After the
pressure has decreased sufficiently, the relief valve spring will force
the seat disc against the seat tightly enough to prevent any further
escape of product. The pressure at which the valve closes tightly is
referred to as the re-seal or blow-down pressure. Generally, the
re-seal pressure will be lower than the start-to-discharge pressure.The re-seal pressure can be, and in most cases is, adversely
affected by the presence of dirt, rust, scale or other foreign particles
lodging between the seat and disc. They interfere with the proper
mating of the seat and disc and the pressure in the container will
usually have to decrease to a lower pressure before the spring force
embeds foreign particles into the resilient seat disc material and
seals leak-tight. The degree by which the presence of dirt decreases
the re-seal pressure, is, of course, dependent on the size of the
interfering particles.
Once particles have been trapped between the disc and seat, the
start-to-discharge pressure is also affected. For example, the pressure relief valve will start-to-discharge at some pressure lower than
its original start-to-discharge pressure. Again, the pressure at which
the valve will start to discharge is dependent on the size of the foreign particles.
In the case of a pressure relief valve that has opened very slightly due
to a pressure beyond its start-to-discharge setting, the chances of
foreign material lodging between the seat and disc is negligible
although the possibility is always present. If the relief valve continues
to leak at pressures below its start-to-discharge setting it must be
replaced.
Relief valves which have popped wide open must also be
checked for foreign material lodged between the seat and
disc, as well as for proper reseating of the seat and disc.
Continued leakage at pressures below the start-to-discharge
setting indicate the relief valve must be replaced.
The pressure at which a pressure relief valve will start to discharge should never be judged by the reading of the pressure
gauge normally furnished on the container.
The reasons for this are two-fold:
If the relief valve is called upon to open, the resulting discharge
produces an increased vaporization of the product in the container with the result that the liquid cools to a certain extent and
the vapor pressure drops. A reading taken at this time would
obviously not indicate what the pressure was when the relief valve
opened.
The pressure gauges usually on most containers provide somewhat approximate readings and are not intended to provide an
indication of pressure sufficiently accurate to judge the setting of
the relief valve.

Repair and Testing

RegO Pressure Relief Valves are tested and listed by Underwriters
Laboratories, Inc., in accordance with NFPA Pamphlet #58.
Construction and performance of RegO Pressure Relief Valves are
constantly checked at the factory by U.L. inspectors. Therefore, testing of RegO Pressure Relief Valves in the field is not necessary.

40

Never attempt to repair or change the setting of RegO

Pressure Relief Valves. Any changes in settings or repairs in the
field will void the UL listing and may create a serious hazard.
While the functioning of a pressure relief valve appears to be relatively
simple, the assembly and test procedure used to manufacture these
RegO products is rather complex. Highly specialized test fixtures
and specially trained personnel are necessary to attain proper relief
valve settings. These fixtures and personnel are available only at the
factory.
Any pressure relief valve which shows evidence of leakage,
other improper operation or is suspect as to its performance
must be replaced immediately using approved procedures.

Pipe-Away Adapters
Pipe-away adapters are available for most RegO Pressure Relief
Valves, where it is required or desirable to pipe the discharge above
or away from the container. Each adapter is designed to sever if
excessive stress is applied to the vent piping thus leaving the relief
valve fully operative.
Weep hole deflectors are available on larger relief valves. These
deflectors provide protection against flame impinging on adjacent
containers which could occur from ignition of LP-Gas escaping
through the relief valve drain hole when the valve is discharging.

Selection of RegO Pressure Relief Valves For ASME

Containers
The rate of discharge required for a given container is determined by
the calculation of the surface area of the container as shown in
Chart A for LP-Gas and Chart B for anhydrous ammonia. See
page D9.
Setting - The set pressure of a pressure relief valve depends upon
the design pressure of the container. Refer to NFPA Pamphlet #58
for more information.

Selection of RegO Pressure Relief Valves for DOT

Containers
To determine the proper relief valve required for a given DOT container, refer to the information shown with each pressure relief valve
in the catalog. This information will give the maximum size (pounds
water capacity) DOT container for which the relief valve has been
approved.
Setting - The standard relief valve setting for use on DOT cylinders is
375 PSIG.

Ordering RegO Pressure Relief Valves

When ordering RegO Pressure Relief Valves, be sure you are certain
that it will sufficiently protect the container as specified in the forewording information, NFPA Pamphlet #58 and any other applicable
standards or specifications.
All adapters, protective caps and deflectors must be ordered separately, unless specified otherwise.

Part Number Explanation

Products carrying an A or AA prefix contain no brass parts and
are suitable for NH3. Hydrostatic relief valves carrying an SS prefix
are of stainless steel construction and are suitable for use with NH3.
The products are also suitable for use with LP-Gas service except
relief valves carrying an AA prefix. These are of partial aluminum
construction and are listed by U.L. for NH3 service only.

RegO Pressure Relief Valves & Relief Valve Manifolds

Chart A Minimum Required Rate of Discharge for LP-Gas Pressure Relief Valves Used on
Minimum required rate of discharge in cubic feet per minute of air at 120% of the maximum permitted start-to-discharge
ASME Containers
From NFPA Pamphlet #58, Appendix D (1986).

Surface
Area
Sq. Ft.
20 or less
25
30
35
40
45
50
55
60
65
70
75
80

Flow
Rate
CFM
Air
626
751
872
990
1100
1220
1330
1430
1540
1640
1750
1850
1950

Surface
Area
Sq. Ft.
85
90
95
100
105
110
115
120
125
130
135
140
145

Flow
Rate
CFM
Air
2050
2150
2240
2340
2440
2530
2630
2720
2810
2900
2990
3080
3170

pressure for pressure relief valves to be used on containers other than those constructed in accordance with Interstate
Commerce Commission specification.

Surface
Area
Sq. Ft.
150
155
160
165
170
175
180
185
190
195
200
210
220

Flow
Rate
CFM
Air
3260
3350
3440
3530
3620
3700
3790
3880
3960
4050
4130
4300
4470

Surface
Area
Sq. Ft.
230
240
250
260
270
280
290
300
310
320
330
340
350

Surface area =Total outside surface area of container in square feet.

When the surface area is not stamped on the name plate or when the marking is not legible, the area can be calculated by using one of the following formulas:
1. Cylindrical container with hemispherical heads. Area (in sq. ft.) = overall
length (ft.) x outside diameter (ft.) x 3.1416.
2. Cylindrical container with semi-ellipsoidal heads. Area (in sq. ft.) = overall
length (ft.) + .3 outside diameter (ft.) x outside diameter (ft.) x 3.1416.
3. Spherical container. Area (in sq. ft.) = outside diameter (ft.) squared x
3.1416.
Flow Rate CFM Air = Required flow capacity in cubic feet per minute of air
at standard conditions, 60F. and atmospheric pressure (14.7 psia).
The rate of discharge may be interpolated for intermediate values of surface

Flow
Rate
CFM
Air
4630
4800
4960
5130
5290
5450
5610
5760
5920
6080
6230
6390
6540

Surface
Area
Sq. Ft.
360
370
380
390
400
450
500
550
600
650
700
750
800

Flow
Rate
CFM
Air
6690
6840
7000
7150
7300
8040
8760
9470
10170
10860
11550
12220
12880

Surface
Area
Sq. Ft.
850
900
950
1000
1050
1100
1150
1200
1250
1300
1350
1400
1450

Flow
Rate
CFM
Air
13540
14190
14830
15470
16100
16720
17350
17960
18570
19180
19780
20380
20980

Surface
Area
Sq. Ft.
1500
1550
1600
1650
1700
1750
1800
1850
1900
1950
2000

Flow
Rate
CFM
Air
21570
22160
22740
23320
23900
24470
25050
25620
26180
26750
27310

area. For containers with total outside surface area greater than 2000 square
feet, the required flow rate can be calculated using the formula, Flow Rate
CFM Air = 53.632 A0.82. Where A = total outside surface area of the container
in square feet.
Valves not marked Air have flow rate marking in cubic feet per minute of liquefied petroleum gas. These can be converted to ratings in cubic feet per
minute of air by multiplying the liquefied petroleum gas ratings by the factors
listed below. Air flow ratings can be converted to ratings in cubic feet per
minute of liquefied petroleum gas by dividing the air ratings by the factors listed below.
Air Conversion Factors
Container Type
100
125
150
175
200
Air Conversion Factor
1.162 1.142
1.113 1.078 1.010

Chart B Minimum Required Rate of Discharge for Anhydrous Ammonia Pressure Relief Valves
Used on ASME Containers Minimum required rate of discharge in cubic feet per minute of air at 120% of the maximum permitted start-to-disFrom ANSI K61.1-1981, Appendix A (1981).

Surface
Area
Sq. Ft.
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90

Flow
Rate
CFM
Air
258
310
360
408
455
501
547
591
635
678
720
762
804
845
885

Surface
Area
Sq. Ft.
95
100
105
110
115
120
125
130
135
140
145
150
155
160
165

Flow
Rate
CFM
Air
925
965
1010
1050
1090
1120
1160
1200
1240
1280
1310
1350
1390
1420
1460

charge pressure for pressure relief valves to be used on containers other than those constructed in accordance with
United States Department of Transportation cylinder specifications.

Surface
Area
Sq. Ft.
170
175
180
185
190
195
200
210
220
230
240
250
260
270
280

Flow
Rate
CFM
Air
1500
1530
1570
1600
1640
1670
1710
1780
1850
1920
1980
2050
2120
2180
2250

Surface
Area
Sq. Ft.
290
300
310
320
330
340
350
360
370
380
390
400
450
500
550

Surface area = Total outside surface area of container in square feet.

When the surface area is not stamped on the name plate or when the marking
is not legible, the area can be calculated by using one of the following formulas:
1. Cylindrical container with hemispherical heads. Area (in sq. ft.) = overall
length (ft.) x outside diameter (ft.) x 3.146.
2. Cylindrical container with other than hemispherical heads. Area (in sq. ft.) =
overall length (ft.) + .3 outside diameter (ft.) x outside diameter (ft.) x
3.1416.
3. Spherical container. Area (in sq. ft.) = outside diameter (ft.) squared x
3.1416.

Flow
Rate
CFM
Air
2320
2380
2450
2510
2570
2640
2700
2760
2830
2890
2950
3010
3320
3620
3910

Surface
Area
Sq. Ft.
600
650
700
750
800
850
900
950
1000
1050
1100
1150
1200
1250
1300

Flow
Rate
CFM
Air
4200
4480
4760
5040
5300
5590
5850
6120
6380
6640
6900
7160
7410
7660
7910

Surface
Area
Sq. Ft.
1350
1400
1450
1500
1550
1600
1650
1700
1750
1800
1850
1900
1950
2000
2050

Flow
Rate
CFM
Air
8160
8410
8650
8900
9140
9380
9620
9860
10090
10330
10560
10800
11030
11260
11490

Surface
Area
Sq. Ft.
2100
2150
2200
2250
2300
2350
2400
2450
2500

Flow
Rate
CFM
Air
11720
11950
12180
12400
12630
12850
13080
13300
13520

Flow Rate CFM Air = Required flow capacity in cubic feet per minute of air at
standard conditions, 60F. and atmospheric pressure (14.7 psia).
The rate of discharge may be interpolated for intermediate values of surface
area. For containers with total outside surface area greater than 2,500 square
feet, the required flow rate can be calculated using the formula, Flow Rate
CFM Air = 22.11 A0.82 where A = outside surface area of the container in
square feet.
Conversion Factor
ft2 x 0.092 903 = m2
CFM x 0.028 317 = m3/min
ft x 0.304 8
=m

41

RegO Pressure Relief Valves & Relief Valve Manifolds

Pop-Action Pressure Relief Valves
General Information

Relief valves in this catalog are only intended for use in LP-Gas or
anhydrous ammonia service. Do not use any relief valve contained in
this catalog with any other service commodity. If you have an application other than conventional LP-Gas or anhydrous ammonia
service, contact Engineered Controls International, Inc. before proceeding.

The Pop-Action design permits the RegO Pressure Relief Valve to

open slightly to relieve moderately excessive pressure in the container.
When pressure increases beyond a predetermined point, the valve is
designed to pop open to its full discharge capacity, reducing excess
pressure quickly. This is a distinct advantage over ordinary valves which
open gradually over their entire range, allowing excessive pressure to
develop before the relief valve is fully open. All RegO internal, semiinternal, and external relief valves incorporate this Pop-Action design.

Fully Internal Pop-Action Pressure Relief Valves for

Transports and Delivery Trucks
Designed specifically for use as a primary relief valve in ASME transports and delivery trucks with
2" and 3" NPT couplings.
Features
Low profile design assures maximum protection against sheering or distortion.
All functioning parts are located below the level of the container connection to reduce the
possibility of damage or tampering.
Longer spring size designed to minimize stress cracking in service.
Use of two different materials for stem and guide minimizes the possibility of stem seizure which
may occur when similar materilas are used.
Internal octagonal wrenching broach assures easy installation and removal.
ASME approved for use with LP-Gas and anhydrous ammonia.
Materials
Body ..........................................................................Stainless Steel
Spring ........................................................................Stainless Steel
Stem ..........................................................................Stainless Steel
Stem Bushing ..............................................17-4PH Stainless Steel
Seat Disc ................................................Resilient Synthetic Rubber
Flow Capacity SCFM/Air

Part
Number
A8434N
A8434G
A8436N
A8436G

Start To
Discharge
Setting
PSIG
265
250
265
250

UL
(At 120%
of Set
Pressure)

Height
Above
Coupling
(Approx.)

Container
Connection

Overall
Height
(Approx.)

2" M. NPT

9 116"

12

3700

3" M. NPT

17 78"

34

10210

"
"

ASME
(At 120%
of Set
Pressure)
3659
3456
9839
9598

Accessories
Suitable for
Tanks with
Surface Area
Up To:*

Protective
Cap
(Included)

Valve
Wrench

175 Sq. Ft.

A8434-11B

M13835

602 Sq. Ft.

A8436-11B

M3235

* Per NFPA Pamphlet #58, Appendix D. Area shown is for UL or ASME flow ratingwhichever is larger.

Fully Internal Pop-Action Pressure Relief Valves for

Motor Fuel Containers
7543-10

8543 Series relief valves are designed for use as a primary relief valve in
larger ASME motor fuel containers such as on buses, trucks and construction equipment.
8544 Series relief valves are designed for use as a primary relief valve in
smaller ASME and DOT motor fuel containers such as on tractors, lift
trucks, cars and taxicabs.

7544-11A

Flow Capacity SCFM/Air****

Part
Number
8544G
8543G
8544T
8543T
8544K
*
**
***
****

42

Container
Type

Start To
Discharge
Setting
PSIG
250

ASME
312
DOT/ASME

375

Container
Connection
M. NPT
1"
114"
1"
114"
1"

Overall
Height
(Approx.)

5 716"

Height
Above
Coupling
(Approx.)

78

"

Hex
Wrenching
Section
1516"
11116"
1516"
11116"
1516"

UL
(At 120% of
Set Pressure)
1020
1465
1282
1990
1545***

1" M. NPT outlet connection.

114" M. NPT outlet connection.
Rating also applies to DOT requirements.
Flow rates shown are for bare relief valves. Adapters and pipeaway will reduce flow as discussed in forewording information.

ASME
(At 120% of
Set Pressure)
936
1400
1158
1731

Accessories
Protective
Cap
(Included)
7544-41
7543-40C
7544-41
7543-40C
7544-41

Pipeaway
Adapter
7544-11A*
7543-10**
7544-11A*
7543-10**
7544-11A*

RegO Pressure Relief Valves & Relief Valve Manifolds

Fully Internal Pop-Action Pressure Relief Valve
for DOT Fork Lift Cylinders
Designed specifically for use as a primary relief valve on forklift cylinders,
the 8545AK reduces the possibility of improper functioning of the relief
mechanism due to foreign material build up. All guides, springs, stem and
adjusting components are located inside the cylinder - removed from
the direct exposure of foreign materials and debris from the atmosphere.

NFPA Pamphlet #58 requires that:

All containers used in industrial truck (including forklift truck cylinders)
service shall have the container pressure relief valve replaced by a new or
unused valve within 12 years of the date of manufacture of the container
and each 10 years thereafter.

7545-14A 45 Adapter
7545-12 90 Adapter
8545AK

Part
Number

Container
Type

8545AK

Start to
Discharge
Setting
PSIG

DOT

375

Container
Connection
M. NPT

Accessories
(Order Separately)

Flow Capacity SCFM/Air**

Deflectors***
(ECIl Rated at 480 PSIG)

Protective
Cap

400*

7545-40

3/4 "

45
Elbow

90
Elbow

7545-14A

7545-12

* Classified by U.L. in accordance with Compressed Gas Association Pamphlet S-1.1 Pressure Device Standards for Cylinders.
Meets requirements for use on DOT containers with 262 pounds or less weight of water or 109 pounds or less of LP-Gas.
** Flow rates are shown for bare relief valves. Adapters and pipeaways will reduce flow as discussed in forewording information.
*** Order protective cap #8545-41 or 7545-40.

Semi-Internal Pop-Action Pressure Relief Valves for ASME Containers

Designed for use as a primary relief valve on ASME containers such as
250, 500 and 1,000 gallon tanks. Underwriters Laboratories lists containers systems on which these types of valves are mounted outside the
hood without additional protection, if mounted near the hood and fitted
with a protective cap.

Flow Capacity SCFM/Air

Part
Number
7583G
8684G
8685G

Start To
Discharge
Setting
PSIG
250

Height
Container
Overall
Above Wrench
Connection Height
Coupling
Hex
M. NPT
(Approx.) (Approx.) Section
34"
8 316"
1716"
134"
1"
9 38"
1916"
178"
114"
11 116"
11116"
2 38"

UL
(At 120%
of Set
Pressure)
1980
2620
4385

ASME
(At 120%
of Set
Pressure)
1806
2565
4035

Suitable
for Tanks
w/Surface
Area Up
To:*
80 Sq. Ft.
113 Sq. Ft.
212 Sq. Ft.

Protective
Cap
(Included)
7583-40X
8684-40
7585-40X

* Per NFPA Pamphlet #58, Appendix D. Area shown is for UL or ASME flow ratingwhichever is larger.

Rain Cap
Part #
85A

Description
Universal Rain Cap

85A

43

RegO Pressure Relief Valves & Relief Valve Manifolds

Semi-Internal Pop-Action Pressure Relief Valves for Large Storage Containers
Designed especially for use as a primary relief valve on large stationary
storage containers, these low profile relief valves are generally mounted in
half couplings. However, they are designed so that the inlet ports clear
the bottom of a full 2" coupling. This assures that the relief valve should
always be capable of maximum flow under emergency conditions.

Flow Capacity SCFM/Air*

Part
Number
7534B
7534G

Start To
Discharge
Setting
PSIG
125
250

Container
Connection
M. NPT
2"

UL
(At 120%
of Set
Pressure)
6,025
11,675

Suitable
for Tanks
w/Surface
Area Up
To:**
319 Sq. Ft.
708 Sq. Ft.

ASME
(At 120%
of Set
Pressure)

10,422

Accessories
Protective Pipeaway
Cap
Adapter
7534-40

7534-20***

* Flow rates shown are for bare relief valves. Adapters and pipeaways will reduce flow as discussed in the forewording information.
** Per NFPA Pamphlet #58, Appendix D. Area shown is for UL or ASMEwhichever is larger.
*** 3" F. NPT outlet connection.

External Pop-Action Pressure Relief Valves

for ASME Containers and Bulk Plant Installations

3135-10

3132-10

Designed for use as a primary relief valve on ASME above ground and
underground containers, bulk plant installations and skid tanks. The 3131
Series may also be used as a primary or secondary relief valve on DOT
cylinders, or as a hydrostatic relief valve.
All working components of these relief valves are outside the container
connection, so the valves must be protected from physical damage.
3135

Relief Valve Exchange Program*

for Model A3149 only.
Call for Price and Availability.

A3149

AA3135

W3132G

Flow Capacity SCFM/Air (a)

Part
Number
AA3126L030
A3149L050
A3149L200
AA3126L250
3131G
AA3130UA250
W3132G
3132G
T3132G
MV3132G
3135G
AA3135UA250
3133G
A3149G*
AA3130UA265
AA3135UA265
AA3126L312

Start To
Discharge Container
Overall
Setting Connection Height
PSIG
M. NPT
(Approx.)
12"
30
2 38"
50
2 12"
10 12"
200
12"
2 38"
34

"

Wrench
Hex
Section
78"
418"
78

"

7 16

34

3 "

1"

6 132"

2 38"

1"
250
114"

265
312

112"
2 12"
34"
114"
12"

52132"
6 1332"
5 1516"
10 12"
3 716"
6 1332"
2 38"

2 1116"
3 18"
418"
134"
2 1116"
78"

(a) Flow rates shown are for bare relief valves. Adapters and pipeaways will
reduce flow as discussed in forewording information.
(b) Not UL or ASME rated. .059 square inch effective area.
(c) Not UL or ASME rated. ECII rated at 120% of set pressure.
(d) Rated at 110% of set pressure.
(e) Per NFPA Pamphlet #58, Appendix D. Area shown is for UL or ASME flow
ratingwhichever is larger.

44

UL
(At 120%
of Set
Pressure)

ASME
(At 120%
of Set
Pressure)

(b)
2600 (c)
8770 (c)
277 (c)
2060
2045
3340
4130
3790
3995
5770
6430
6080
10390
2125
6615
330 (c)

1939
1838

5080 (d)

9153
1912
5370 (d)

Accessories
Suitable for
Tanks with
Surface Area
Up To: (e)

Pipeaway Adapter
Protective
Cap

7545-40
113 Sq. Ft.
3149-40
500 Sq. Ft.
23 Sq. Ft. (f)
7545-40
85 Sq. Ft.
3131-40 (g)
249 Sq. Ft. (f)
AA3130-40P
154 Sq. Ft.
200 Sq. Ft.
3132-54 (g)
180 Sq. Ft.
190 Sq. Ft.
300 Sq. Ft.
3135-54 (g)
1010 Sq. Ft. (f) AA3135-40PR
320 Sq. Ft.
3133-40 (g)
613 Sq. Ft.
3149-40
261 Sq. Ft. (f)
AA3130-40P
1045 Sq. Ft. (f) AA3135-40PR
27 Sq. Ft. (f)
7545-40

(f) Per ANSI K61.1-1972, Appendix A.

(g) Cap supplied with chain.
(h) Outlet 312-8N (F) thread, will accept 3" M. NPT pipe thread.
(j) Weep hole deflector is Part No. A3134-11B.

Part
Number

Outlet
Size
12

AA3126-10

" M. NPT

(h)

Weep
Hole
Delfector

Included (j)

12

AA3126-10

" M. NPT

AA3131-10
3132-10

1" F. NPT
114" F. NPT

114" F. NPT

3132-10

3135-10
AA3135-10
3133-10

3133-11
2" F. NPT

(h)
AA3131-10
AA3135-10
AA3126-10

1" F. NPT
2" F. NPT
12" M. NPT

Included (j)

3133-11

RegO Pressure Relief Valves & Relief Valve Manifolds

External Pop-Action Supplementary Pressure Relief Valves for
Small ASME Containers and DOT Cylinders
Designed for use as a supplementary relief valve on small ASME above
ground and underground containers. They may also be used as a primary or secondary relief device on DOT cylinders, or as hydrostatic relief
valves.
All working components of these relief valves are outside the container
connection, so the valves must be protected from physical damage.
Flow Capacity SCFM/Air*

Accessories
Pipeaway Adapter

Part
Number
3127G
3129G
3127K
3129K

Container
Type
ASME

DOT

Start To
Discharge Container
Connection
Setting
M. NPT
PSIG
250

375

Overall
Height
(Approx.)

14

1 3132"

12

2 1932"

14

1 3132"

12

2 1932"

"
"
"
"

Wrench
Hex
Section
78

UL
(At 120%
of Set
Pressure)

"

295

118"

465

ECII
Rated
at 480
PSIG**

Suitable for
Tanks with
Surface Area
Up to: ***

450

100 lbs./Propane

780

200 lbs./Propane

78

"

118"

Protective
Cap

Part
Number

Outlet
Size

7545-40

12

3129-10

" F. NPT

3129-10

12

" F. NPT

* Flow rates shown are for bare relief valves. Adapters and pipeaways will reduce flow as discussed in forewording information.
** Not UL or ASME rated. ECII rated at 480 PSIG.
*** Meets DOT requirements.

External Hydrostatic Relief Valves

Designed especially for the protection of piping and shut-off valves where
there is a possibility of trapping liquid LP-Gas or anhydrous ammonia.
They may be installed in pipelines and hoses located between shut-off
valves or in the side boss of RegO shut-off valves.

3129-10

Accessories

Part
Number
SS8001G
SS8002G
SS8021G
SS8022G
3127G
3129G
3127H
3129H
3127P
3129P
3127J
3129J
SS8001J
SS8002J
SS8021J
SS8022J
3127K
3129K
3125L
3127L
3129L
SS8001L
SS8002L
SS8021L
SS8022L
3127U
3129U
SS8001U
SS8002U
SS8021U
SS8022U

Start To
Discharge
Setting
PSIG

250

Valve
Body
Material
Stainless
Steel

275
Brass
300

350

Stainless
Steel

375
Brass

Container
Connection
M. NPT
14"
12"
14"
12"
14"
12"
14"
12"
14"
12"
14"
12"
14"
12"
14"
12"
14"
12"
14

"

12

400
Stainless
Steel
Brass
450

Stainless
Steel

"
14"
12"
14"
12"
14"
12"
14"
12"
14"
12"

Height
(Approx.)
78

"

138"
13132"
21932"
13132"
21932"
13132"
21932"
13132"
21932"
78

"

138"
13132"
21932"
1916"
13132"
21932"
78

"

138"
13132"
21932"
78

"

138"

Wrench
Hex
Section
1116"
78"
1116"

Pipeaway
Protective
Cap

"

7545-40

"
7545-40

" NPSM Thrds

38" NPT Thrds

3129-10*

3129-10*

3129-10*

3129-10*

14

" NPSM Thrds

38" NPT Thrds

3129-10*

Included
7545-40
3129-40P

3129-10*

SS8022G

78

"

118"
"
78"
1116"
78"

14

78

118"
58"
78"
118"
1116"
78"
1116"

3129G

78

118"
78"
118"
78"
118"
78"
118"
1116"
78"
1116"

Adapter or
Threads

7545-40

14

" NPSM Thrds

38" NPT Thrds

3129-10*

11 16

14

" NPSM Thrds

38" NPT Thrds

* 12" F. NPT outlet connection.

45

RegO Pressure Relief Valves & Relief Valve Manifolds

DuoPort Pressure Relief Valve Manifolds
for Small Storage Containers
Designed especially for use as a primary relief device on smaller stationary storage containers, with 2" NPT threaded couplings. These manifolds
allow servicing or replacement of either of the two relief valves without
evacuating the container or loss of service. The operating lever selectively
closes off the entrance port to the relief valve being removed while the
remaining valve provides protection for the container and its contents.
The rating of each manifold is based on actual flow through the manifold
and a single pressure relief valve, taking friction loss into account. It is not
merely the rating of the relief valve alone.

Relief Valve Included

Part
Number
8542G
AA8542UA250
AA8542UA265

Start To
Discharge
Setting
PSIG
250
265

Application
LP-Gas

NH3

Yes

No

No

Flow Capacity SCFM/Air**

Accessory

Inlet
Connection
M. NPT

Container
Connection
M. NPT

Quantity

Part
Number

2"

AA3135MUA250

3135MG

Yes

114"

Pipeaway
Adapters

UL
(At 120% of
Set Pressure)

3135-10*

5250 (1)
5865 (1)

AA3135-10*

AA3135MUA265

5975 (1)

* 2" F. NPT outlet connection.

** Flow rating based on number of relief valves indicated in parenthesis ( ). Flow rates shown are for bare relief valves. Adapters and pipeaways will reduce flow
rates as discussed in forewording information.

MultiportTM Pressure Relief Valve Manifold Assemblies

for Large Storage Containers
A8560
A8570

Designed especially for use as a primary relief device on large stationary

pressurized storage containers with flanged openings. These manifolds
incorporate an additional relief valve, not included in the flow rating,
allowing for servicing or replacement of any one of the relief valves without evacuating the container. The handwheel on the manifold selectively
closes off the entrance port to the relief valve being removed while the
remaining relief valves provide protection for the container and its contents. All manifold flow ratings are based on flow through the relief valves
after one has been removed for service or replacement.

3134-11B

8560-26TP
Part
Number

Consists
of

For Use
With:

For Connection To:

Number
Required

7560-55

1-Bolt
Stud and
Nut

All RegO
MultiportsTM

Modified 3"-300# and

4"-ASA 300# Welding
Neck Flange

7560-56

Part
Number
A8563G
A8564G
AA8573G
A8573G
A8574G
A8563AG
A8564AG
A8573AG
A8574AG

Start To
Discharge
Setting
PSIG

Manhole Cover Plate

Relief Valve
Application
LP-Gas

NH3

Yes
250

No

Container
Flange
Connection
3"-300#*

Yes
4"-300#

Yes

3"-300#*
250

Yes

Yes
4"-300#

* For use with modified 300# ANSI flange with 4" port.
** Flow rating based on number of relief valves indicated in parenthesis ( ).
Flow rates shown are for bare relief valves. Adapters and pipeaways will
reduce flow rates as discussed in forewording information.

46

Quantity
3
4
3
4
3
4
3
4

Part
Number

Inlet
Connection
M. NPT

Accessories

A3149MG

2 12"

****

AA3135MUA250

14

1"

AA3135-10***

A3149MG

2 12"

****

A3149G

2 12"

Pipeaway
Adapters

****

Flow Capacity SCFM/Air**

At 120% of Set Pressure
UL
Rating
18,500 (2)
27,750 (3)
11,400 (2)
18,500 (2)
27,750 (3)
Not
Applicable

*** 2" F. NPT outlet connection.

**** Outlet 312-8N (F) thread, will accept 3" M. NPT pipe thread.

ASME
Rating

Not
Applicable

18,300
27,400
18,300
27,400

(2)
(3)
(2)
(3)

RegO Globe & Angle Valves

V-Ring Seal Globe and Angle Valves
General Information
RegO Globe and Angle Valves are designed and manufactured especially to meet the rigid requirements of the LP-Gas industry. The high
quality construction and wide variety of sizes and styles also make them
highly suited to many other industries such as anhydrous ammonia,
chemical and petrochemical.
These ductile iron valves are available in both threaded and flanged connections. Threaded connections are available in 12" F. NPT to 3" F. NPT
sizes. Flanged connections are available in 112", 2" and 3" pipe sizes.
The ductile iron used in these valves has a 60,000 PSIG tensile strength
which closely approaches that of steel castings. Its yield strength of
45,000 PSIG and elongation of 15% is also comparable to that of steel
castings. These material features assure the ability of the valve body to
withstand impact, wrenching stresses and thermal shock. This ductile
iron conforms to ASTM specification A395.
RegO globe and angle valves are designed for working pressures up to
400 PSIG WOG and for operating temperatures from -40 F. to +160 F.

V-Ring Stem Seal

the seal, keeps the seal free from grit, and/or other foreign material that
may hamper operation.

Installation and Operation Note

Containers and pipe lines should be thoroughly cleaned before globe and
angle valves are installed. Large particles of solid foreign matter can permanently damage the seating surface in the valve body, causing the
valve to leak. Use a minimum amount of a suitable pipe dope on the
male connecting threads as excess amounts may fall off and be carried
into the valve, causing damage to the seat or other operating parts.
It is totally unnecessary to use excess force in opening or closing RegO
valves. The type of seat disc material used and the general design of
these valves permits them to be opened and closed easily. Proper valve
operation insures unusually long life.
Wrenches must never be used to operate valves equipped with handwheels and designed for hand operation.

Downstream Accessory Boss

These RegO valves incorporate a plugged 14" F. NPT boss on the downstream side of the body for attaching either a hydrostatic relief valve or
vent valve. Boss size on the 2" and 3" valves has been increased to
allow a 34" drilling for accommodation of a standard by-pass valve or
jumper lines.

The V-ring spring-loaded pressure seal used in these RegO globe and
angle valves is the most effective stem seal yet developed. It should not
be confused with conventional valve stem packing where the seal is
obtained by compressing the packing around the stem by means of a
packing gland with resultant hard operation and frequent packing
replacement.
The wax like surface of the teflon V-ring seal and consequent low friction assures leak-tight performance for an indefinite period where periodic retightening of the packing is not required and the seal provides extra long service life.
In the RegO V-ring design, the seal is effected by the pressure
expanding the V-shape of the seal, forcing it against the stem and
bonnet surfaces to prevent leakage. The higher the pressure within the
valve, the more effective the seal becomes. A spring loaded washer under the V-rings keeps them in an expanded position to assure an
effective seal under low pressure conditions. A wiper ring, located above

Hydrostatic ReliefWhen the design of the piping installation is such

that liquid may be locked between two shut-off valves, a hydrostatic
relief valve should be installed in the lines between the valves. The
pressures which can develop due to temperature increase in a liquidfull line are tremendous and can easily damage the valves or piping
unless a hydrostatic relief valve is installed.
Vent ValveIf the globe or angle valve is used as a shut-off valve on a
loading hose, a vent valve should be installed in the downstream boss
to allow liquid trapped beyond the shut-off valve to be vented before
disconnecting the hose coupling.

Replace Gate Valves with Flanged Valves

Except for standard flange sizes, RegO Flanged Globe and Angle Valves
are smaller and lighter than contemporary valves, thus reducing price
and shipping costs and making them far easier to install. RegO face to
face flange dimensions conform to gate valve dimensions, making
replacement of most gate or plug valves with RegO valves simple and
easy.

General Features
Heavy Duty Handwheel
provides easy operation.
O-Ring Wiper keeps sand
and grit away from pressure
seal and stem threads.
Heavy Duty ACME Threads
for quick action and smooth
operation.
Swivel Seat Holder
promotes long life.

Synthetic Rubber Seat

assures easy, positive
shut-off.

Teflon V-Ring
Spring-Loaded Pressure
Seal for leak-proof
operation. No packing to
adjust or replace.

Stainless Steel Stem is centerless

ground to provide a smooth
sealing surface.

Rugged Ductile Iron Body

wont crack or fracture
from wrenching, dropping
or hammer blows.
Circular Bridge is
contoured to provide
extra high capacity and
low pressure drop.

47

RegO Globe & Angle Valves

V-Ring Seal Globe and Angle Valves for Bulk
Storage Containers, Transports, Bobtails and Plant Piping
Specifically designed to assure positive shut-off and long, maintenancefree service life in liquid or vapor service on bulk storage containers,
transports, bobtails, cylinder filling plants and plant piping.
The high quality construction and wide variety of sizes make them highly suited for use with LP-Gas, anhydrous ammonia and in the chemical
and petrochemical industries.

TA7034

A7517AP

A7514AP

A7518FP

Part Number
Buna N Seat Discs
Globe

Angle

A7517FP

A7513AP

A7505AP

Teflon Seat Discs*

Globe

Angle

Inlet and
Outlet
Connection
12" F. NPT

Port
Diameter

Flow at 1 PSIG
Pressure Drop (Cv)
(GPM/Propane)***
Globe
10.0

Angle
14.8

TA7034P

TA7034LP

A7505AP

A7506AP

TA7505AP

TA7506AP

12.0

17.7

A7507AP

A7508AP

TA7507AP

1" F. NPT

1"

17.8

22.0

A7509BP

A7510BP

TA7509BP

TA7510BP

114" F. NPT

114"

36.5

54.0

A7511AP

A7512AP

TA7511AP

TA7512AP

112" F. NPT

43.0

55.5

A7511FP

46.0

A7513AP

A7514AP

TA7513AP

A7513FP

A7514FP

TA7513FP

A7517AP

A7518AP

TA7517AP

TA7518AP

3" F. NPT

A7517FP

A7518FP

TA7517FP

3" Flange**

34

" F. NPT

112" Flange**

2" F. NPT
2" Flange**

34

"

112"

2"
318"

75.0

88.5

78.0

133.0

197.0

303.0

* Teflon seat discs on valves built to order.

* * 300# ANSI R.F. Flange.
* * * To obtain approximate flow at other than 1 PSIG pressure drop, multiply flow in chart by square root of pressure drop.
Example: 7514FP @ 9 PSIG = 133 x 9 = 399 GPM/propane. For NH3 flow, multiple propane flow by .90.

48

Accessories
Hydrostatic
Relief
Valve

Vent
Valve

SS8001U

TSS3169

RegO Globe & Angle Valves

LP-Gas Hose-End Filling Valves (With ACME Connectors)
ECII Safety Warning
Purpose
In its continuing quest for safety, Engineered Controls International, Inc. publishes a series of bulletins explaining the
hazards associated with the use, misuse, and aging of LP-Gas valves and regulators. It is hoped that these factual bulletins will make clear to LP-Gas dealer managers and service personnel, that the utmost care and attention
must be used in the installation, inspection, and maintenance of these products, or problems could occur which
would result in injuries and property damage.
The National Fire Protection Association Pamphlet #58, Storage and Handling Of Liquified Petroleum Gases states
in Section 1-6 that In the interest of safety, all persons employed in handling LP-Gases shall be trained in proper
handling and operating procedures. These ECII Safety Warnings may be useful in training new employees and
reminding older employees of hazards that can occur.
It is recommended that all employees be furnished with a copy of NPGA Safety Pamphlet 306-88 LP-Gas
Regulator and Valve Inspection and Maintenance.

Nature of Warnings
It is recognized that warnings should be as brief as possible, but factors
involved in filler valve and filling valves failure are not simple. They need to
be fully understood so that proper procedures and maintenance can be
used to prevent accidents. If there is a simple warning, it would be:
Loosen filling valve from filler valve very slowly. If there is a leak,
know procedure to follow.
This bulletin is not intended to be an exhaustive treatment of the subject
of filler valves and certainly does not cover all safety practices that should
be followed in the installation, operation and maintenance of LP-Gas
systems, which include filler and filling valves.

Loosen slowly.
If gas continues
to vent, retighten
ACME connector
and follow company emergency
procedures.

Hose-End Filling Valves With ACME Connectors

Hose-end valves must never be dragged over the ground or dropped
or banged into the truck when the hose is reeled in.
They could open accidentally or they could be damaged. Dragging will
cause abnormal wear and eventual valve failure. Foreign material will
lodge in the connector which can cause failure of the filler valve.

To prevent hazardous conditions, operators should follow this procedure on every filling application:
Always wear gloves and eye protection.
Check for foreign material in hose-end valve and the filler valve, and
if present, remove with extreme care. If material cannot be safely
removed, do not proceed with filling and replace valve.
Make sure the ACME connector spins on easily by hand.
If leak is noticed when filling is started, stop the operation and correct the leaking condition.
After filling, bleed the gas trapped between the filler valve and hoseend valve by using the vent on the hose-end valve or by slightly
loosening coupling nut to vent the gas before disconnecting.
If gas does not stop venting, then filler valve or hose-end valve
is leaking. Do not disconnect filling connector. This is a hazardous situation and your company procedure for handling
this problem must be carefully followed.
Make sure your company has such a procedure.

Inspection of Filling Valves with Handwheel

Valves should be inspected at least once a month to be sure the

valve handle is tight and not damaged, that the stem is not bent and
that there is no play in the threads in the bonnet. Play will normally not be noticed if the valve is under pressure.
The ACME threads should be examined for wear, dents or nicks and
the seating area should be clean and smooth.

Inspection of Quick Acting Filling Valves

Valves should be inspected daily to make sure locking mechanism

functions properly.

The ACME threads should be examined for wear, dents or nicks and
the seating area should be clean and smooth.
The retaining ring on the filler connection should be examined to
make sure it is properly holding the female ACME rotating nut or handle so as to keep the surface that seats on the filler valve gasket
protected.
If any problems are evident, valves should be immediately replaced or
repaired.

Larger Filler and Filling Valves

For 214" and 314" valves with ACME connections, use only the special
wrenches designed for the purpose.
Do not use pipe wrenches or hammers to tighten the connections. All
of the previous warnings about the smaller valves also apply here.

General Warning
All ECII products are mechanical devices that will eventually become
inoperative due to wear, contaminants, corrosion and aging components
made of materials such as rubber and metal. The environment and conditions of use will determine the safe service life of these products.
Periodic inspection and maintenance are essential. Because ECII products have a long and proven record of quality and service, LP-Gas dealers may forget the hazards that can occur because a filler valve or a filling
valve is used beyond its safe service life. Life of these valves is determined by the environment in which they live. The LP-Gas dealer knows
better than anyone what this environment is.
Note: There is a developing trend in state legislation and in proposed
national legislation to make the owner of products responsible for replacing products before they reach the end of their safe useful life. LP-Gas
dealers should be aware of the legislation which could affect them.

49

RegO Globe & Angle Valves

Quick-Acting Minimum Loss Hose-End Valves
for Bobtail Delivery Trucks and Dispensing Stations
Designed to vastly reduce the amount of product vented when disconnecting bobtail delivery trucks, dispensing systems and anhydrous
ammonia nurse tanks.
These valves provide instant, full-on flow at the flip of a handle. Shut-off is
instant and the handle locks for added protection.
This top of the line hose-end valve is a fully contained unit that does not
require additional filling adapters or connectors.

Part
Number
A7793A
A7797A

Outlet
Connection
(F. ACME)

Locking
Handle

Flow At
1 PSIG (Cv)
Pressure Drop*
(GPM/Propane)

"

134"

Yes

16.0

1"

34

Yes

16.0

Inlet
Connection
(F. NPT)
34

1"

A7797A

* To obtain approximate flow at other than 1 PSIG pressure drop, multiply flow in table by square
root of pressure drop. Example: A7797 @ 9 PSIG = 16.0 x 9 = 48.0 GPM/propane. For NH3
flow, multiply propane flow by .90.

Quick-Acting Hose-End Valves for

Bobtail Delivery Trucks and Dispensing Stations
Designed especially for safe operator handling of LP-Gas in bobtail
delivery truck, dispensing systems and anhydrous ammonia nurse tank
service.
These valves provide instant, full-on flow at the flip of the handle and provide instant positive shut-off with a handle lock for added protection.

A7707L

Accessories

Part
Number

Body
Design

A7707L

Globe

A7708L

Angle

Inlet &
Outlet
Connection
(F.NPT)

Locking
Handle

Flow At
1 PSIG (Cv)
Pressure Drop*
(GPM/Propane)

Filling Connectors**
Extended
Steel

Brass

Steel

A7575L4

3175A

A3175A

18.0
1"

Yes
22.0

* To obtain approximate flow at other than 1 PSIG pressure drop, multiply flow in table by square root of pressure drop.
Example: A7708L @ 9 PSIG = 22.0 x 9 = 66.0 GPM/propane. For NH3 flow, multiply propane flow by .90.
* * See appropriate catalog section for additional information.

50

Compact

A7708L

RegO Globe & Angle Valves

Flange Seal Globe and Angle Valves
General Information

General Features

Globe and Angle Valves, incorporating the synthetic rubber flange seal
design, operate on the same principle as the V-ring valves. Gas pressure in the valve is exerted against the synthetic rubber flange, forcing it
tightly against the stem.

Rugged quick-acting
ACME threads on stem.
Threads are under flange
ring . . . dust, sand and grit
cant reach them.
Swivel seat cannot
grind during valve
opening or closing.
Synthetic Rubber
Seat Disc

Nylon bearing
surrounds stem to
prevent galling.
Rubber flange ring
stem seal effectively
prevents gas escape.
The higher the
pressure, the tighter
the seal.
Metal to metal back
seat permits
replacement of
flange ring with
valve in service.

Leak-tight performance is assured and periodic adjustment is not

required. The synthetic rubber construction provides smooth operating
performance with long service life.
These valves all incorporate a plugged 14" NPT side boss on the downstream side of the valve that can be equipped with a hydrostatic relief
valve or vent valve.
Please be familiar with the Installation and Operation Note and
Downstream Accessory Boss section of the V-ring valve design
general information before ordering these valves.

Valve body made of shell molded ductile iron. Highly resistant

to cracking or fracturing from wrenching, dropping or hammer
blows. Bonnet and seal cap are steel on A prefix valves.

Flange Seal Globe and Angle Valves for

Bulk Storage Containers, Filling Hoses and Plant Piping
Designed to assure positive shut-off and long maintenance-free service
life in liquid or vapor service. Ideally suited for use on cylinder charging
manifolds, truck filling hoses, bulk storage containers and plant piping.
The high quality construction and wide variety of sizes make them highly suited for use with LP-Gas, anhydrous ammonia and in the chemical
and petrochemical industries.

Part
Number
Globe
Angle
7704P

7704LP

A7704P

A7704LP

7705P
A7705P

7706P
A7706P

Accessories
Flow At 1 PSIG
Inlet
and Outlet Pressure Drop (Cv) Hydrostatic
Connection (GPM/Propane)*
Vent
Relief
(F.NPT)
Valve
Valve
Globe
Angle
12

7.3

12.3

34

11.5

17.7

"
"

SS8001J
or
SS8001L

TSS3169

A7704P

* To obtain approximate flow at other than 1 PSIG pressure drop, multiply flow in table by square
root of pressure drop. Example: A7704LP @ 9 PSIG =12.3 x 9 = 36.9 GPM/propane. For NH3
flow, multiply propane flow by .90.

A7706 P

51

RegO Globe & Angle Valves

Flange Seal Liquid Transfer Angle Valves for
Bulk Storage Containers
Designed especially for liquid transfer of LP-Gas from consumer bulk
storage containers when used with a Chek-Lok or equipped with an
integral excess flow valve. May also be used for vapor LP-Gas service.
In NH3 applicator tanks they may be used as a vapor bleeder valve or as
a liquid withdrawal valve when installed in a coupling with a dip pipe.
These liquid transfer valves are equipped with an integral excess flow
valve for liquid transfer directly from the tank fitting, or without an integral
excess flow for LP-Gas transfer through a Check-Lok.
When equipped with an integral excess flow valve (7550PX), the valve
should be mounted in a forged steel 3000 lb. half coupling. When mounted in a 1 14" x 34" NPT reducing coupling, the 34" female thread in this
coupling must be full length equivalent to a forged steel 3000 lb. half
coupling.
A7550PX

7550P

The excess flow valve will not function properly if these specifications are
not met.

Accessories

Part
Number

Inlet
Connection
(M.NPT)

Outlet
Connection
(F.NPT)

7550P
A7550P

Excess Flow
Approximate
Closing Flow
(GPM/Propane)**

No

13.3

Yes

16.0

34

"

7550PX

34

"

A7550PX
7551P

12

"

A7551P
7550UP

Integral
Excess
Flow

Flow At
1PSIG (Cv)
Pressure Drop*
(GPM/Propane)

" Undersize

34

8.9

No

13.3

34

"

Hydrostatic
Relief
Valve

Vent
Valve

3127U

3165

SS8001J

TSS3169

3127U

3165

SS8001J

TSS3169

3127U

3165

SS8001J

TSS3169

3127U

3165

* To obtain approximate flow at other than 1 PSIG pressure drop, multiply

flow in table by square root of pressure drop. Example: 7550P @ 9 PSIG =
13.3 x 9 = 39.9 GPM/propane. For NH3 flow, multiple propane flow by .90.
* * For NH3 flow, multiply propane flow by .90.

Quick-Acting Valves for Cylinder Charging Hoses

Designed primarily for use on cylinder charging hoses to provide fast,
convenient shut-off and fast opening.
These valves must be installed so that flow through the valve is in the
opposite direction to that of a conventional globe valve. This allows the
inlet flow to assist in closing the valve, and even more important, helps
prevent the valve from being forced open by high pump pressure.

Part
Number
7901T
A7553A
7901TA

Inlet
Connection
(F.NPT)
14

14

38

38

"
"

"

"

12

"

Body
Material
Brass

1.95
Brass

12

"

* To obtain approximate flow at other than 1 PSIG pressure drop, multiply flow in table by square root of
pressure drop. Example: 7901T @ 9 PSIG = 1.95 x 9 = 5.85 GPM/propane. For NH3 flow, multiply
propane flow by .90.

52

Flow At
1 PSIG (CV)
Pressure Drop*
(GPM/Propane)

Ductile Iron

"

14

7901TB
7901TC
7053T

Outlet
Connection
(F.NPT)

A7553A

7901TA

RegO Globe & Angle Valves

Quick-Acting Valves for
Crop Driers and Charging Manifold Hoses
7554S Series valves provide instant shut-off and fast opening control on
LP-Gas crop driers. They are also ideal for charging manifold hoses, stationary fuel transfer hoses and other applications requiring quick, positive
shut-off. They are not for use with delivery truck hoses because the handle could snag on the ground and open the valve as the hose is reeled
back to the truck.
7554L Series valves feature a locking handle device to help prevent accidental opening of the valve. It is ideal for all the same applications as the
7554S Series and may be used on delivery trucks as it incorporates the
locking handle design.
Both valve series must be installed so that flow through the valve is
opposite to that of a conventional globe valve. This allows the inlet flow to
assist in closing the valve and prevents the valve from being opened by
high pump pressures.

7554S

7554LV

Part
Number
7554SAV
7554LAV
7554SV
7554LV

Inlet &
Outlet
Connection
(F.NPT)
12

"

34

"

Locking
Handle
No
Yes
No
Yes

Flow At
1 PSIG (Cv)
Pressure Drop*
(GPM/Propane)
7.3
11.5

* To obtain approximate flow at other than 1 PSIG pressure drop, multiply flow in table by square
root of pressure drop. Example: 7554LV @ 9 PSIG = 11.5 X 9 = 34.5 GPM/propane.

53

RegO Globe & Angle Valves

Tank Car Angle Valves for Railroad Tank Cars
Designed especially for transfer of LP-Gas and anhydrous ammonia in
railroad tank car service.
The combined heavyweight ductile iron castings and precision machining
provide ruggedness and superior performance in working pressures up
to 400 PSIG.

Part Number

Inlet Connection

Outlet Connection
(F.NPT)

Flow At 1 PSIG (Cv) Pressure Drop

(GPM/Propane)

TA7894P

Tank Car Flange

2"

112

Accessories
Hydrostatic Relief Valve
SS8001U

Vent Valve
TSS3169

* To obtain approximate flow at other than 1 PSIG pressure drop, multiply flow in table by square root of pressure drop. Example: TA7894P @ 9 PSIG = 112 x 9 = 336 GPM/propane. For NH3 flow, multiply
propane flow by .90.

Multipurpose Valve for Filling or Vapor

Equalizing of NH3 Containers
Designed specifically for use as a manual valve or vapor equalizing valve
on anhydrous ammonia applicator and nurse tanks.
This valve incorporates an integral excess flow valve. When product is
required, the valve must be completely open and backseated to allow the
excess flow valve to function properly as explained in the excess flow
valve section of this catalog.

Approximate
Exess Flow
Closing Flows

Part
Number

Filling
Connection
(M.ACME)

Filling Capacity
At 20 PSIG
Pressure Drop
GPM/NH3

Liquid*
GPM/NH3

Vapor**
CFH/NH3

Hydrostatic
Relief Valve

Vent
Valve

A8016DP

114"

134"

95

44

24,000

SS8001J

TSS3169

* Determined at 9.5 to 12 PSIG differential.

* * Determined at 100 PSIG inlet.

Multipurpose Valve for Filling

of NH3 Containers
Designed specifically for use as a manual filler valve on anhydrous
ammonia applicator.
This valve incorporates an integral excess flow valve. When product is
required, the valve must be completely open and backseated to allow the
excess flow valve to function properly as explained in the excess flow
valve section of this catalog.

Accessories

Part
Number

Inlet
Connection
(M.NPT)

Filling
Connection
(M.ACME)

Filling Capacity
At 20 PSIG
Pressure Drop
GPM/NH3

Hydrostatic
Relief Valve

Vent
Valve

A8016DBC

114"

134"

95

SS8001J

TSS3169

* Determined at 9.5 to 12 PSIG differential.

* * Determined at 100 PSIG inlet.

54

Accessories

Inlet
Connection
(M.NPT)

RegO Globe & Angle Valves

Multipurpose Valves for Liquid Withdrawal of
LP-Gas and NH3 Containers
Designed especially for use as a high capacity liquid withdrawal valve on
LP-Gas and anhydrous ammonia containers.
These valves incorporate an integral excess flow valve. When product is
required, the valve must be completely open and backseated to allow the
excess flow valve to function properly as explained in the excess flow
valve section of this catalog.
The A8017DH is equipped with a soft seated automatic differential back
pressure check valve in the seat disc assembly. This allows any pressure
build up in the liquid transfer line in excess of 10-15 psig above the container pressure to flow back into the container. The transfer hose is protected against excessive liquid or vapor pressure entrapment, which
adds materially to the useful life of flexible hose. In addition to increasing
hose service life, the equalizing valve adds substantially to the operating
safety of liquid transfer systems.
Accessories

Part
Number

Inlet
Connection
(M.NPT)

Outlet
Connection
(F.NPT)

A8017DH*

Hydrostatic
Relief Valve

49

Not Required

1"

114"

A8017DP

Approximate Excess
Flow Liquid Closing Flow**
(GPM/Propane)
55

34

A8017DLP

"

49

Vent
Valve
TSS3169

SS8001J

* Built-in back pressure check valve incorporated into shut-off valve.

* * Determined at 11.5 to 13.5 PSIG differential for 34" outlet and 9 to 12 PSIG differential for 1" outlet. For NH3 flow, multiply by .90.

Multipurpose Valve for Filling and

Liquid Transfer of NH3 Containers
Designed primarily for use as a combination filler and liquid withdrawal
valve on three-opening applicator tanks or on nurse tanks.
This valve incorporates an integral excess flow valve. When product is
required, the valve must be completely open and backseated to allow the
excess flow valve to function properly as explained in the excess flow
valve section of this catalog.
Accessories

Part
Number

Inlet
Connection
(M.NPT)

Outlet
Connection
(F.NPT)

Filling
Connection
(M.ACME)

Filling Capacity At
20 PSIG
Pressure Drop
GPM/NH3

A8018DP

114"

1"

134"

74

Approximate
Excess Flow
Liquid Closing
Flow GPM/NH3*

Hydrostatic
Relief Valve

Vent
Valve

50

SS8001J

TSS3169

* Determined at 9 to 12 PSIG differential.

Multipurpose Right Angle Valve for Liquid or Vapor

Service In LP-Gas and NH3 Systems
Designed especially for use as a high capacity liquid withdrawal valve in
LP-Gas and NH3 systems.
Valve may be mounted directly in nurse tank load-out risers eliminating
the need for a separate excess flow valve and angle valve.
This valve incorporates an integral excess flow valve. When product is
required, the valve must be completely open and backseated to allow the
excess flow valve to function properly as explained in the excess flow
valve section of this catalog.

Accessories
Approximate Excess Flow
Liquid Closing Flow*

Part
Number

Inlet
Connection
M. NPT

Outlet
Connection
F. NPT

GPM/Propane

GPM/NH3

Hydrostatic
Relief Valve

Vent
Valve

A8020D

114"

1"

78

70

SS8001J

TSS3169

* Determined at 13 PSIG differential.

55

RegO Globe & Angle Valves

Vent Valves
Especially designed to bleed off liquid or vapor pressures trapped in
transfer lines. When installed in the downstream boss of RegO globe
and angle valves used at the end of a liquid transfer hose, the bleeder
valve allows for the controlled venting of the product and indicates to the
operator that the valves are closed and he can disconnect the coupling.
They may also be used as a fixed liquid level gauge where the dip tube is
part of the container.
Accessories
Part
Number
3165C
3165S
TSS3169

Service

Connection

LP-Gas
Only

14

" M. NPT

LP-Gas
& NH3

Actuation
Knurled
Slotted
Tee
Handle

Warning
Plate Kit

2550-40P

3165C
with
2550-40P

3165S

Combination Valve for Bulk Storage Containers

Designed for installation on bulk storage containers, this valve combines
a pressure gauge mounting and provision for a fixed tube liquid level
gauge.
The shut-off valve prevents the pressure gauge from being subjected to
constant pressure, thereby prolonging its life and accuracy. The valve
may be closed, and the vent valve opened to vent pressure from the
gauge to permit replacement.
For fixed liquid level gauging, the valve can be mounted at the maximum
permitted filling level. When equipped with a dip tube threaded 18"
M.NPT, it can be installed at any convenient level.

Part
Number

Container
Connection
34

A2805C

" M. NPT

Service
Connection
14" F. NPT for
Gauge Mounting

Liquid
Level
Vent
Knurled*

18

* Has " F. NPT opening for installing separate dip tube.

Fixed Liquid Level Gauges

Especially designed to provide a visible warning when containers are
filled to the maximum permitted filling level. At the start of the filling operation, with the vent stem opened, the valve discharges vapor. When the
maximum permitted filling level is reached, the valve discharges liquid.
These valves are normally furnished with a 12", 316" O.D. dip tube and
incorporate a No. 54 drill size orifice.
An optional instruction plate with Stop Filling When Liquid Appears
may be ordered for use with these valves.

UL

Accessories
Part
Number

Service

Connection

Actuation

3165CF*
3165CF12.0

14

" M. NPT

3165SF12.0
TA3169F12.0

Knurled

LP-Gas
Only
LP-Gas
& NH3

* Dip tube must be ordered separately. Add to suffix.

Example: 11" Dip Tube = 3165F11.0.

56

Slotted

Dip
Tube
Length

Warning
Plate Kit

12"

2550-40P

3165SF12.0

Tee
Handle

TA3169F12.0

TSS3169

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

LP-Gas Excess Flow Valves
Safety Warning

Purpose
In its continuing quest for safety, Engineered Controls International, Inc. publishes a series of bulletins explaining the hazards associated with the use, misuse, and aging of LP-Gas valves and regulators. It is hoped that these factual bulletins
will make clear to LP-Gas dealer managers and service personnel, that the utmost care and attention must be used in
the installation, inspection, and maintenance of these products, or problems could occur which would result in injuries
and property damage.
The National Fire Protection Association Pamphlet #58, Storage and Handling Of Liquefied Petroleum Gases states in
Section 1-6 that In the interest of safety, all persons employed in handling LP-Gases shall be trained in proper handling
and operating procedures. These ECII Safety Warnings may be useful in training new employees and reminding older
employees of hazards that can occur.
It is recommended that all employees be furnished with a copy of NPGA Safety Pamphlet 306-88 LP-Gas Regulator
and Valve Inspection and Maintenance.

Nature of Warnings
It is recognized that warnings should be as brief as possible, but the factors involved in excess flow valve failures to perform are not simple. They
need to be fully understood. If there is a simple warning, it would be:

2. The break or damage to the downstream line is not large enough

to allow enough flow to close the valve.

Make sure that the excess flow valve really closes when the
flow exceeds normal transfer flow.
This bulletin is not intended to be an exhaustive treatment of excess
flow valves, and certainly does not cover all safety practices that should
be followed in installation, operation and maintenance of LP-Gas systems
which include excess flow valves.

3. A shut-off valve in the line is only partially open and will not
allow enough flow to close the excess flow valve.

Selection and Installation

The selection of a given closing rating of an excess flow valve involves an
analysis of the complete piping system and is beyond the scope of this
bulletin.

It is sufficient to say that an excess flow valve must be installed in the correct direction and will close only if the flow of liquid or vapor exceeds its
designed closing rating. Many valves have been installed with closing ratings considerably higher than any flow that could be obtained by a
downstream rupture in piping or hoses and thus give none of the protection for which they are intended.

4. LP-Gas pressure upstream of the excess flow valve, particularly

due to low temperature, is not high enough to produce a closing
flow rate.

Engineered Controls International, Inc. provides excess flow valves with a

number of closing ratings. Engineered Controls International, Inc. obviously can take no responsibility for the proper selection or correct installation of any valve.
Excess flow valves do not provide complete shut-off because there is a
bleed at the check to permit pressure equalization.

Causes of Failure to Close

Installers, LP-Gas plant managers and service personnel should be
aware that the excess flow valves may not close if these conditions are
present.
1. The piping system restrictions (due to pipe length, branches,
reduction in pipe size or number of other valves) decrease the
flow rate to less than the valves closing flow.

5. Foreign matter (such as

welding slag, scale or sludge)
is lodged in the valve and
prevents closing.

57

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Because of these limitations, it is good industry practice to NOT rely
entirely on excess flow valves for protection. Installation of emergency
shut-off valves with remote controls is recommended in addition to
excess flow valves.

Any test of any excess flow valve will not prove that the valve will close in
an emergency situation, due to reasons cited before. This test will only
check the valves condition, and the flow rate sizing for those test
conditions.

Testing
The National Propane Gas Association Safety Bulletin #113-78 states:

General Warning
In order to test an excess flow valve in a piping system, the flow
through the valve must be made to exceed the valves closing rating.
This testing should only be attempted by trained personnel familiar
with the process. If no one at the facility has experience in proper
testing, outside expert help should be obtained. The exact procedure
used may vary with the installation, advisability of gas discharge and
availability of equipment.
In general, most testing makes use of the fact that excess flow valves are
surge sensitive and will close quicker under a sudden flow surge than
under steady flow. A sufficient surge can often be created by using a
quick open/close valve to control sudden, momentary flow into a tank or
piping section containing very low pressure. An audible click from the
excess flow valve (and corresponding stoppage of flow) indicates its
closure.

All ECII products are mechanical devices that will eventually become
inoperative due to wear, contaminants, corrosion and aging of components made of materials such as metal and rubber.
The environment and conditions of use will determine the safe service life
of these products. Periodic testing at least once a year when tank pressures are low and maintenance, as required, are essential.
Because ECII products have a long and proven record of quality and
service, LP-Gas dealers may forget the hazards that can occur because
an excess flow valve is used beyond its safe service life. Life of an excess
flow valve is determined by the environment in which it lives. The LPGas dealer knows better than anyone what this environment is.
NOTE: There is a developing trend in state legislation and in proposed
national legislation to make the owners of products responsible for
replacing products before they reach the end of their safe useful life. LPGas dealers should be aware of legislation which could effect them.

A test involving venting gas to the atmosphere is hazardous and may

be impractical, or illegal.

Troubleshooting Excess Flow Valve Installations

Periodical Inspections for Excess Flow Valves
Excess flow valves should be tested and proven at the time of installation and at periodic intervals not to exceed one year. CAUTION:
Testing an excess flow valve in the summer when tank pressures are
high will not prove that the same valve will also function under low
pressure conditions in the winter. Once a year testing should be conducted during the winter.
The test should include a simulated break in the line by the quick opening
of a shut-off valve at the farthest point in the piping that the excess flow
valve is intended to protect. If the excess flow valve closes under these
conditions, it is reasonable to assume that it will close in the event of
accidental breakage (clean break) of the piping at any point closer to the
excess flow valve.
The National Propane Gas Association Safety Bulletin Number 113-78
states:

What prevents excess flow valves from closing when

the line breaks?
For one or a combination of the following reasons, excess flow valves
have been prevented from closing in emergencies:

1. Not a Clean Break

Hoses with a split or tear, and pipe lines
not completely severed may be emitting
LP-Gas in an amount insufficient to cause
an excess flow. The amount of LP-Gas
which can escape through such breaks
may be even less than the flow during normal transfer service and under these conditions the excess flow valve could not be
expected to close.

2. Line Restriction Too Great

In order to test an excess flow valve in a piping system, the flow
through the valve must be made to exceed the valves closing rating.
This testing should only be attempted by trained personnel familiar
with the process. If no one at the facility has experience in proper
testing, outside expert help should be obtained. The exact procedure
used may vary with the installation, advisability of gas discharge and
availability of equipment.
In general, most testing makes use of the fact that excess flow valves are
surge sensitive and will close quicker under sudden flow surge than
under steady flow. A sufficient surge can often be created by using a
quick open/close valve to control sudden, momentary flow into a tank or
piping section containing very low pressure. An audible click from the
excess flow valve (and corresponding stoppage of flow) indicates its
closure.
A test involving venting gas to the atmosphere is hazardous and may
be impractical or illegal.
Any test of any excess flow valve will not prove that the valve will close in
an emergency situation, due to reasons cited before. This test will only
check the valves condition and the flow rate sizing for those test
conditions.

58

An excess flow valve installed in a tank

outlet will not close if the line beyond it is
reduced or if the flow is otherwise restricted by too many fittings or too long a run
because the line is incapable of passing
the amount of LP-Gas necessary to create
an excess flow. This condition should be
corrected when testing a system by simulating a break at the farthest possible point
and replacing any restrictive hose, pipe or
fittings.

3. Improper Operating Practice

A restriction can also be imposed upon
the excess flow valve by an improperly
opened valve at the tank outlet. The shutoff valve should be either fully opened or
fully closed. If throttled, the valve could
reduce the amount of LP-Gas passing
through the excess flow valve in a sufficient amount to keep it from closing.
Throttling operations should not be performed in the lines being protected by
excess flow valves.

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

4. Improper Selection

6. Impurities in the Line

The many types of excess flow
valves available are designed for specific jobs. The excess flow valve
selected should remain open during
normal flow but close at excess
flow. An inspection which simulates
a line break prior to start-up operations will determine if the proper valve
has been selected.

Dirt, weld slag, broken drill taps, and various

other foreign objects have been found jammed
between the valve disc and valve seat to prevent excess flow valves from closing. A pre-test
of the system would also discover this.

5. Tampering with Excess Flow Valves

Sometimes an operator, annoyed with frequent
closures of an excess flow valve with too low a
rating, has mutilated the valve and forgotten to
replace it with a properly rated excess flow
valve. A pre-test of the system would reveal this
and allow the excess flow valve to be replaced.

Excess Flow Valves

General Information
RegO Excess Flow Valves have been designed, developed, and manufactured for a wide variety of industry needs for more than three decades.
Throughout the years, those concerned with installing and operating bulk
plant facilities have looked to RegO products with confidence for reliable, long-lasting valves as required by the National Fire Protection
Association (NFPA) Standards 58 and 59, as well as any state, provincial,
and local regulations.
It is a responsibility we have not taken lightly. RegO products continue to
not only assess the most effective designs, but anticipate and meet the
industrys changing requirements. Toward that goal, RegO products
include over fifty different types and sizes of excess flow valves (most of
which are listed by Underwriters Laboratories) to meet the needs of the
LP-Gas and anhydrous ammonia industries.

Proper Installation
Since excess flow valves depend on flow in order to close, the line downstream of the excess flow valve should be large enough not to excessively restrict the flow. If the piping is too small, unusually long or restricted by too many elbows, tees and other fittings, consideration should be
given to the use of larger size pipe fittings.
An excess flow valve in a pump suction line cannot be expected to close
in the case of a clean break in the line beyond the pump, as the pump
constitutes too great a restriction, even if running.
Good piping practices dictate the selection of an excess flow valve with a
rated closing flow of approximately 50 percent greater than the anticipated normal flow. This is important because valves which have a rated
closing flow very close to the normal flow may chatter or slug closed
when surges in the line occur during normal operation, or due to the
rapid opening of a control valve.
All installations must be in accordance with NFPA Standards 58 and 59,
as well as state, provincial and local regulations.

An Explanation and Warning

An excess flow valve is a spring-loaded check valve which will close only
when the flow of fluid through the valve generates sufficient force to
overcome the power of the spring holding it open. Each valve has a
closing rating in gallons per minute and CFH/air.
The selection of a proper closing rating is critical. It requires a technical understanding of the flow characteristics of the piping system,
including restrictions of the piping and other valves and fittings downstream of the excess flow valve.
System designers and operating people must understand why an excess
flow valve, which remains open in normal operations, may fail to close
when an accident occurs.

Cotter pin prevents loss of spring

retainer due to vibration in service.
Spring retainer.
Stainless steel spring for consistent closing flow, long service life.

Welded for strength.

Warning: A downstream break in piping or hoses may not result

in sufficient flow to close the valve.

How They Work

Excess flow valves permit the flow of liquid or vapor in either direction.
This flow is controlled in only one direction (the direction of the arrow
stamped on the valve). If the flow in that direction exceeds a predetermined rate (shown in this catalog for each valve), the valve automatically
closes.
The valve disc is held in the open position by a spring. When the flow
creates a pressure drop across the valve disc that overcomes the preset
load on the spring, the valve disc moves to the closed position. It remains
closed until the force on both sides of the valve disc are approximately
equal (a small bleed hole in the disc of each valve permits equalization),
then the spring automatically reopens the valve. When a line is completely broken, the pressure cannot equalize and the excess flow valve
remains closed until the line is repaired. Because the bleed hole in each
valve disc permits equalization of pressure, excess flow valves do not
provide a 100 percent type shut-off.

Precision machining.

Generous flow channels for lowest

pressure drop are particularly
important in pump suction lines.

59

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

The Limitations of Excess Check Valves for LP-Gas
Excess flow check valves have been of help in limiting gas loss in many
incidents involving breakage of hoses and transfer piping. Thus, they do
provide a useful safety function in LP-Gas systems. However, there have
also been transfer system accidents where excess flow valves have been
ineffective in controlling gas loss due to a variety of conditions and to the
inherent limitations of these valves. This bulletin explains what protection
excess flow valves can offer, points out conditions which can interfere
with that protection, and offers suggestions for effective excess flow
valve installation.
An excess flow valve is a protective device to help control the discharge
of product in the event of complete breakage of pipe lines or hose rupture. However, an excess flow valve can only offer limited protection from
gas discharge, because it will only close under those conditions which
cause the flow through the valve to exceed its rated closing flow, and
even when closed it necessarily allows some bleed past the valve.

An excess flow valve is not designed to close and thus

may not provide protection, if any of the following conditions are present:
1. The piping system restrictions (due to pipe length, branches,
reduction in pipe size, or number of other valves) decrease the
flow rate to less than the valves closing flow. (Valve should be
selected by closing flow rating not just by pipe size).
2. The break or damage to the downstream line is not large enough
to allow enough flow to close the valve.
3. A shut-off valve in the line is only partially open and will not allow
enough flow to close the excess flow valve.
4. LP-Gas pressure upstream of the excess flow valve, particularly
due to low temperature, is not high enough to produce a closing
flow rate.
5. Foreign matter (such as welding slag) is lodged in the valve and
prevents its closing.
6. A buildup of process material (sludge), which may be found in
LP-Gas, may occur over a period of time and cause the valve to
stick open.
7. The piping break or damage occurs upstream of an in-line excess
flow valve, so the escaping product is not passing through the
valve.
8. The flow through the valve is in the wrong direction. (Excess flow
valves only respond to flow in one direction.)
9. The excess flow valve has been damaged, or is otherwise not in
operating condition.
Because of these limitations of excess flow valves, they should not be
relied upon as the only means of controlling the escape of product in the

event of piping damage. When possible, shut-off protection by quick

closing valves, with shut-off controls accessible in spite of likely line damage, should be provided in addition to, or instead of excess flow valves.

Where excess flow valves are installed, they should be

checked to see that:
1. They are installed in the correct direction the arrow on the valve
indicates the shut-off direction.
2. The flow rating on the valve is proper for the installation. The rating
must be above the normal system flow, but not higher than necessary to prevent nuisance closing in normal conditions. If the
manufacturers catalog information is not sufficient, the valve suppliers can provide sizing assistance.
3. In-line excess flow valves are installed so likely piping damage will
occur downstream of the valve and will not separate the valve
from the upstream piping.
When the excess flow valves can be examined separate from the line
(before the installation or if removed for system maintenance), they
should be checked to see that the parts are in good condition and that
the poppet can be pushed fully closed.

Testing of Excess Flow Valves

In order to test an excess flow valve in a piping system, the flow
through the valve must be made to exceed the valves closing rating.
This testing should only be attempted by trained personnel familiar
with the process. If no one at the facility has experience in proper
testing, outside expert help should be obtained. The exact procedure
used may vary with the installation, advisability of gas discharge, and
availability of equipment.
In general, most testing makes use of the fact that excess flow valves are
surge sensitive and will close quicker under a sudden flow surge than
under steady flow. A sufficient surge can often be created by using a
quick-closing valve to control sudden, momentary flow into a tank or
piping section containing very low pressure. An audible click from the
excess flow valve (and corresponding stoppage of flow) indicates its
closure.
A test involving venting gas to the atmosphere is hazardous and may
be impractical, or illegal.
Any test of any excess flow valve will not prove that the valve will close in
an emergency situation, due to reasons cited before. This test will only
check the valves condition, and the flow rate sizing for those test conditions.
For additional information on excess flow valves and other means of
shut-off protection, contact Engineered Controls International, Inc. and
refer to NFPA 58.

Prepared by
NATIONAL PROPANE GAS ASSOCIATION
The purpose of this bulletin is to set forth general safety practices for the installation, operation,
and maintenance of LP-Gas equipment. It is not intended to be an exhaustive treatment of the
subject, and should not be interpreted as precluding other procedures which would enhance safe
LP-Gas operations. The National Propane Gas Association assumes no liability for reliance on the
contents of this bulletin.

60

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Excess Flow Valves for Liquid or Vapor Service
Designed for top mounting in storage tank manhole covers for liquid or
vapor applications. The tapped inlet allows for an optional 1" NPT dip
pipe connection to withdraw liquid from the top of the tank.
The 1519C4 is designed for installation in long line or branch piping
applications.

1519C2

1519C4

Approximate Closing Flows**

Vapor SCFH (Propane)
Liquid
(GPM
Propane)

Part
Number

Inlet
Connection
NPT

Outlet
Connection
F. NPT

Wrench
Hex
Flats

1519C2

112" Male*

1"

2 14"

25

5,000

8,800

1519C4

2" Female

2"

3"

170

28,590

48,600

25 PSIG
Inlet

100 PSIG
Inlet

* 1" Female Dip Pipe Connection

** Based on horizontal installation of excess flow valve.
Flows are slightly more when valves are installed with outlet up; slightly less when installed with outlet down.
NOTE: Multiply flow rate by .94 to determine liquid butane flow.

Excess Flow Valves for Liquid or Vapor Line Service

Designed for top installation, in any position, in liquid or vapor service
lines. They are intended for long lines or branch piping where tank
mounted excess flow valves cannot suffice.

1519A2
A1519A6
Approximate Closing Flows*
Vapor SCFH (Propane)
Part
Number
1519A2
A1519A2
1519A3
1519A4
A1519A4
1519B4
A1519B4
A1519A6

Brass
or
Steel
Brass
Steel
Brass
Steel
Brass
Steel

Inlet
Connection
F. NPT

Outlet
Connection
F. NPT

Wrench
Hex
Flats

Liquid
(GPM
Propane)

25 PSIG
Inlet

100 PSIG
Inlet

1"

1"

134"

25

5,000

8,800

12

12

14

1"

2"

3"

1"

2"

3"

2 "

60

11,500

20,200

100

19,000

34,500

133

27,700

50,300

225

45,000

82,000

3"

4"

* Based on horizontal installation of excess flow valve. Flows are slightly more when valves are installed with outlet up;
slightly less when installed with outlet down.
NOTE: Multiply flow rate by .94 to determine liquid butane flow and by .90 to determine liquid anhydrous ammonia flow.

61

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Excess Flow Valves for Liquid or Vapor
Designed for liquid or vapor use for filling, withdrawal and vapor equalizing in container or line applications. They are intended for long lines or
branch piping where tank-mounted excess flow valves are inadequate.

Part
Number
12472
3272E
3272F
3272G
A3272G
3282A
3282B
3282C
A3282C
7574
7574L
3292A
A3292A
3292B
A3292B
A3292C

Brass
or
Steel
Brass

A
Inlet
Connection
M. NPT

34

"

B
Outlet
Connection
F. NPT

34

"

C
Wrench
Hex
Flats

D
Effective
Length
(Approx.)

1 38"

1 38"

Approximate Closing Flows*

Vapor SCFH (Propane)
Liquid
(GPM
Propane)
4
10
15

25 PSIG
Inlet
1,050
2,100
2,800

20

3,700

6,900

30
40

5,850
7,600

10,000
13,600

50

9,000

16,300

90
70

15,200
14,000

28,100
25,000

75

14,200

24,800

100

18,100

32,700

122

22,100

37,600

Steel
Brass

114"

114"

1 516"

2"

Steel
Brass
Steel
Brass

112"

2"

112"

2 14"

1 34"

2"

78

78

2 "

1 "

Steel

* Based on horizontal installation of excess flow valve. Flows are slightly more when valves are installed with outlet up;
slightly less when installed with outlet down.
NOTE: Multiply flow rate by .94 to determine liquid butane flow and by .90 to determine liquid anhydrous ammonia flow.

Excess Flow Valves for Container Service

Designed for mounting in threaded full or half couplings in container
installations. They may be used for filling, withdrawal or vapor equalizing
applications. The exceptionally low pressure drop makes them ideal for
pump suction lines. If a riser pipe to the vapor space is used with these
valves, the minimum inside diameter of the riser pipe must be at least
two times the valve thread size in order not to restrict flow to the side inlet
ports.

Part
Number
A8523
A8525
A7537L4
A7537L4F
A7537N4
A7537N4F
A7537P4
A7537P4F
A7539R6
A7539R6F
A7539T6
A7539T6F
A7539V6
A7539V6F

For Use
With
This Type
Coupling
Half
Half
Half
Full
Half
Full
Half
Full
Half
Full
Half
Full
Half
Full

Approximate Closing Flows*

Vapor SCFH (Propane)
Inlet
Connection
M. NPT
34"
114"

Outlet
Connection
NPT
34" Male
114" Male

2"

2" Male
and
114" Female

3"

3" Male
and
2" Female

Wrench
Hex
Flats
118"
134"

2 58"

3 34"

Liquid
(GPM
Propane)
15
35

25 PSIG
Inlet
5,170
12,540

100 PSIG
Inlet
8,800
21,560

75

13,000

25,600

125

25,000

42,500

150

30,500

52,000

150

32,100

55,500

200

39,400

68,300

250

51,100

88,700

* Based on horizontal installation of excess flow valve. Flows are slightly more when valves are installed with outlet up;
slightly less when installed with outlet down.
NOTE: Multiply flow rate by .94 to determine liquid butane flow and by .90 to determine liquid anhydrous ammonia flow.

62

100 PSIG
Inlet
1,700
3,700
5,000

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Excess Flow Valves for Vapor or Liquid
Designed especially for filling, withdrawing or vapor equalizing in half and
full coupling installations. Ideal for container service where welded-in dip
pipes are not provided. For vapor use, mount in the bottom opening
with a threaded dip pipe. For liquid use, mount in the top opening with a
threaded dip pipe. These may also be installed in pipe lines provided the
connection is made to the male inlet thread and not the female dip pipe
connection.

Approximate Closing Flows***

Vapor SCFH (Propane)

Part
Number

Inlet
Connection
M. NPT

Outlet
Connection
NPT

Wrench
Hex
Flats

2"*

2" Male
and
114"
Female

2 716"

3" Male
and 2" Female

3 12"

A2137
A2137A
2139

3"**

2139A

Liquid
(GPM
Propane)

25 PSIG
Inlet

100 PSIG
Inlet

50

10,000

17,000

70

14,000

25,000

125

26,500

46,000

160

32,700

57,200

* 114" F. NPT Dip Pipe Connection

** 2" F. NPT Dip Pipe Connection
*** Based on horizontal installation of excess flow valve. Flows are slightly more when valves are installed with outlet up;
slightly less when installed with outlet down.
NOTE: Multiply flow rate by .94 to determine liquid butane flow and by .90 to determine liquid anhydrous ammonia flow.

Excess Flow Valves for Flange Mounting in Container Service

Designed for mounting in flanged tank connections with internal threads
in the bottom of a container. They may be used in filling, withdrawal or
vapor equalizing application. They provide high flow capacity with low
pressure drop to minimize pump inlet line cavitation.
If a riser pipe to the vapor space is used with these excess flow valves,
the minimum inside diameter of the riser pipe must be at least two times
the valve thread size in order not to restrict flow to the side inlet ports.
Flange mounted excess flow valves are readily accessible for servicing
and completely enclosed and protected in event of fire. Because there is
no direct connection between external piping and the valve, stresses
imposed on piping will not affect the excess flow valve.

Part
Number
A3500L4
A3500N4
A3500P4
A3500R6
A3500T6
A3500V6
A4500Y8

Inlet
For
Connection
Installation
M. NPT
2"

3"
4"

Slotted
Body

Approximate Closing Flows*

Vapor SCFH (Propane)
Liquid
25 PSIG
100 PSIG
(GPM
Inlet
Inlet
Propane)
75
13,000
22,500
125
25,000
42,500
150
30,500
52,000
150
32,100
55,500
200
39,400
68,300
250
51,100
88,700
500
89,000
154,000

* Based on horizontal installation of excess flow valve. Flows are slightly more when valves are installed with outlet up; slightly less
when installed with outlet down.
NOTE: Multiply flow rate by .94 to determine liquid butane flow and by .90 to determine liquid anhydrous ammonia flow.

63

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Excess Flow Valves for Liquid or Vapor Withdrawal
These valves are designed for bottom mounting in consumer storage
tanks for liquid service. They may also be top mounted for vapor service.
These valves are designed especially for use with RegO globe and
angle valves.

2723C
Approximate Closing Flows**
Vapor SCFH (Propane)
Part
Number
A8013D
A8013DA
A8013DB
2723C

Inlet
Connection
M. NPT

Outlet
Connection
M. NPT

Wrench
Hex
Flats

Liquid
(GPM
Propane)

25 PSIG
Inlet

100 PSIG
Inlet

39
44
55
20

8,700

14,700

10,900
3,900

19,300
6,900

34

114"
114"*

"
1"
114"
34"

178"
11116"

A8013D

* 34" F. NPT Dip Pipe Connection

** Based on horizontal installation of excess flow valve. Flows are slightly more when valves are installed with outlet up; slightly less when installed with outlet down.
NOTE: Multiply flow rate by .94 to determine liquid butane flow and by .90 to determine liquid anhydrous ammonia flow.

Excess Flow Valve for Pressure Gauges

Designed for container use in pressure gauge installations to minimize
excess gas discharge in the event the pressure gauge is sheared. A
suitable shut-off valve should be installed between this valve and the
pressure gauge to allow convenient gauge replacement.

Approximate Closing Flows*

Vapor SCFH (Propane)
Part
Number
2884D

Inlet
Connection
M. NPT
34

"

Outlet
Connection
F. NPT
14

"

Wrench
Hex
Flats

Liquid
(GPM
Propane)

25 PSIG
Inlet

100 PSIG
Inlet

1 116"

N/A

60

110

* Based on horizontal installation of excess flow valve. Flows are slightly more when valves are installed with outlet up;
slightly less when installed with outlet down.
NOTE: Multiply flow rate by .94 to determine liquid butane flow.

Excess Flow Valve for DOT Cylinders

Designed for use on portable systems with vapor or liquid including
torches, heaters, lead melting burners, tar and asphalt burners, wallpaper
steamers and other applications involving portable DOT cylinders. The
POL inlet attaches directly to the cylinder valve and the outlet mounts to
the regulator.
Approximate Closing Flows*
Vapor SCFH (Propane)
Part
Number

Inlet
Connection

3199W

Male POL

Outlet
Connection
M. NPT
14

"

Wrench
Hex
Flats
78

"

Liquid
(GPM
Propane)

25 PSIG
Inlet

100 PSIG
Inlet

.95

265

500

* Based on horizontal installation of excess flow valve. Flows are slightly more when valves are installed with outlet up;
slightly less when installed with outlet down.
NOTE: Multiply flow rate by .94 to determine liquid butane flow.

64

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Chek-Lok Excess Flow Valves
Designed to provide a convenient means of withdrawing liquid from stationary containers prior to moving the container.
NFPA Pamphlet 58 standards require: 1) containers with 125 gallons
water capacity, or more, have a connection for liquid evacuation which is
at least 3/4" NPT, and 2) containers designed for stationary use, have no
more propane than 5% of their water capacity in liquid form during
transportation. These rules apply to containers manufactured after
July 1, 1961.

The Chek-Lok permits one transfer shut-off valve with an adapter to

be used interchangeably on a number of tanks. With a Chek-Lok on
each tank and a high capacity RegO 7550P Series transfer valve and
adapter on all your service and delivery trucks the need for individual
transfer valves is eliminated. This provides a substantial savings without
sacrificing safety.

Chek-Lok Operation
Instructions to Open Chek-Lok
1 Loosen cap to vent any accumulated LP-Gas from the Chek-Lok.
After venting stops, remove the cap. If venting does not stop, retighten the cap and use other approved means to withdraw liquid from
the container.

Connecting the 7590U

or 7591U Chek-Lok
7550P Angle Valve

NOTE: Use a suitable size wrench when removing the cap and
adapter from the Chek-Lok. Do not allow the Chek-Lok to un-thread
from the tank during removal. When necessary, use a second wrench
to secure the Chek-Lok in position.

Before beginning withdrawal, securely connect an ECII 7550P angle

valve or suitable shut-off valve to the adapter. Fully open the shut-off
valve the valves handwheel must be fully opened before connecting
adapter to tank.
Completely thread the adapter and shut-off valve assembly onto the
Chek-Lok by turning adapters coupling nut clockwise until it is tight.
Immediately close the shut-off valve. Listen for an audible click to
signal that the Chek-Lok has opened and is actuated for liquid withdrawal. The flow can now be controlled by the transfer valve.

7590U-10 Adapter

7590U or 7591U Chek-Lok

Check the coupling nut and adapter assembly for leaks using a suitable leak detection solution.
If the Chek-Lok fails to open after following this procedure, the pressure downstream of the shut-off valve should be increased to equalize pressure in the Chek-Lok. It is simple to equalize pressures using
vapor from either the vapor return valve or service valve, or from a
hose end valve connected to the delivery truck.

Instructions to Close Chek-Lok

1 To re-lock the Chek-Lok, container pressure must be in excess of 35

Connecting the
7572FC Chek-Lok
7550P Angle Valve

PSIG. Close shut-off valve and disconnect the hose or piping.

Open shut-off valve fully. Liquid discharging to the atmosphere should

cause the excess flow feature of the Chek-Lok to close, provided
tank pressure is 35 PSIG or more.

7572-14A Adapter

If, for any reason, the excess flow valve does not close, the shut-off
valve must be closed immediately and must not be removed until the
system can be evacuated and the unit repaired.

After the excess flow valve closes, remove the Adapter and Shut-Off
Valve Assembly.

Clean face of Chek-Lok and install the Cap with a gasket. IMPORTANT: Only use the proper Chek-Lok Cap. Do not use a standard
pipe cap.

7572FC Chek-Lok

In the absence of a 7550P transfer valve, a 34" A7505A

Globe Valve or A7506AP Angle Valve may be used. Follow
the above procedures using the 7572C-15A adapter instead
of the 7572C-14A. Use an ECII 7550P without an adapter in
an emergency only.

CAUTION: Always wear approved protective gloves when working with the Chek-Lok.
Do not vent LP-Gas near possible source of ignition.

65

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

7590U and 7591U Chek-Lok Valves

meet

Designed with unique 1" NPS threads on both Chek-Lok outlet and
adapter inlet. This helps prevent activation of the Chek-Lok without use
of the 7590U-10 adapter. Extra strength connection between body and
adapter provides increased strength. An o-ring seal on adapter provides
a gas tight seal before the adapter opens the equalizing stem.
These Chek-Loks are also designed for use on permanent installations
provided the excess flow valve is sized properly for the system and piping. NOTE: In some cases, it may be necessary to use an in-line excess
flow valve to protect the downstream piping. This valve is not recommended for use as a liquid source for pumps.

Chek-Lok
Number

Inlet
Connection

Outlet
Connection

34

7590U

" M. NPT

s
the need .
rs
te
e
mark

7590U-10
Union Style Adapter
7590U
with Cap

Body
Wrench Hex
Flats

Approximate
Effective
Length

158"
134"

11116"

158" UNF

114" M. NPT

7591U

. to
SIGN . .
NEW DE of propane gas

Cap
Wrench
Hex Flats

1716"

Approximate
Closing Flow,
Liquid GPM
(Propane)*
20

1516"

35

* Based on horizontal installation of excess flow valve. Flows are slightly more when valves are installed with outlet up, and slightly less when installed with outlet down.
Note: Multiply flow rate by .94 to determine liquid butane flow.

Union Style Adapters for 7590U and 7591U

The 7590U-10 adapter must be used to connect to the 7590U and
7591U Chek-Lok. This insures a proper connection to open the
check mechanism. A built in nylon gasket provides a gas tight seal.

Adapter
Number

Inlet
Connection

7590U-10

158" UNF

Outlet
Connection
34

" F. NPT

Wrench
Hex
Flats
134"

Chek-Lok Liquid Evacuation Adapter for 7590U and 7591U Valves

Designed specifically for use with RegO 7590U and 7591U Chek-Lok
Excess Flow Valves. Adapters operating handle opens and closes equalizing stem in the Chek-Lok valve. Eliminates gas flow through Chek-Lok
valve when installing or removing adapter. Use of RegO adapter ensures
proper connections and opening of the check mechanism.

Adapter
Number

Inlet
Connection

7590U-20

1 5 / 8" F. UNF

Outlet
Connection

A
Wrench Hex
Flats

B
Approximate
Length

/ 4" F. NPT

1 3 / 4" F. NPT

4 1 / 8" F. NPT

7572FC and 7580FC Chek-Lok Valve Adaptors

Adapters for the 7572FC and 7580FC
These adapters must be used to connect to the 7572FC and 7580FC
Chek Loks to open the check mechanism properly. A built in nylon
gasket provides a gas tight seal.
7572C-14A
Adapter
Number

Inlet
Connection

Outlet
Connection
34

7572C-14A

" F. NPT

34

138"

" M. NPT

7572C-15A

66

Wrench
Hex
Flats

34

" M. NPT

7572C-15A

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Double-Check Filler Valves

Spare Gasket Ordering Information

ACME
114"
134"
214"
314"

General Information
RegO Double-Check Filler Valves incorporate a resilient upper check
valve, normally designated as a filler valve, and a lower check valve,
commonly called a back pressure check valve. Available in a range of
sizes to cover virtually all LP-Gas storage containers, these valves are UL
listed and meet NFPA standards, as well as other safety requirements.
Flow of liquid into the storage container opens both check valves. When
flow stops, they both are designed to close automatically to permit the
operator to disconnect the hose coupling. The automatic closing action
also helps prevent the discharge of container contents in the event of
hose failure. The lower back pressure check affords extra protection by
restricting the discharge if the upper check fails to function properly due
to accidents or other causes.

Part Number
A2797-20R
A2697-20R
A3184-8R
A3194-8R

Seal cap made of tough, resilient molded plastic. Protects threads and internal
working parts. Caps are designed to
contain normal tank pressures, and
must be kept on valves at all times.
Long-wearing gasket permits hand-tight
connection of cap and hose coupling.
Safety groove is designed to shear
below the ACME thread, leaving the
valve seats closed and unaffected if the
delivery truck pulls away with the hose
connected.
Seat disc of special synthetic composition is extra thick for longer life.
Valve guide is precision machined to
assure positive seal.
Exclusive swing-away lower back check
valve for extra fast filling is provided on
Models 6579 and 6587. Differs from
conventional design by swiveling to a
vertical position when opened.

The double back check construction allows emergency inspection,

repair, or replacement of the upper fill assembly without removing product from the container. When the upper filler valve body is removed, the
lower back check valve provides a seal, permitting only some leakage,
allowing a new upper filler valve body to be installed.

Double Check Filler Valves for Forklift, Motor Fuel and RV Tanks
Lanyard and Cap

Designed to provide fast filling of forklift, motor fuel, and recreational

vehicle tanks.

Part Number

Basic

w/Lanyard
and Cap

7647H

7647HF

7647DC

7647SA**

7647SA

7647H

7647HF

7647SC*

A
Hose
Connection

B
Tank
Connection
M. NPT

C
Wrench
Flats

12

Propane Liquid Capacity at Various

Differential Pressures (GPM)***
10
PSIG

20
PSIG

30
PSIG

40
PSIG

50
PSIG

14

20

24

27

50

2 716"

" F. NPT

12

2 58"

" SAE Flare

134" ACME
& F. POL

D
Effective
Length
(Approx.)

7647DC

7647SC

12

34

"

134" ACME

1"

3"
3116"

34

1 "*

214"*

* Large 134" hex wrench flats.

** 30 angle on 1-1/4" ACME hose connection.
*** Multiply flow rate by .94 to determine liquid butane capacity.

67

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Double-Check Filler Valves for Large Motor Fuel and ASME Tanks
Designed to provide fast filling of large motor fuel and ASME domestic
tanks.
The 6579 Series incorporates a swing-away lower check which greatly
reduces pressure drop across the valve. This lower pressure drop
promotes faster filling rates and greater efficiency resulting in more
profitable operations.

7579P
7579

Part
Number

ACME
Hose
Connection

Tank
Connection
M. NPT

134"

114"*

Propane Liquid Capacity at Various

Differential Pressures (GPM)

Wrench
Hex
Flats

114"

7579
7579P

178"

114"

6579**

6579

5
PSIG

10
PSIG

25
PSIG

50
PSIG

75
PSIG

50

70

111

157

192

37

52

82

116

142

78

110

174

246

301

* Incorporates 34" F. NPT dip pipe connection

** Swing-away lower back check valve design for higher filing rate.
NOTE: Multiply flow rate by .94 to determine liquid butane capacity.

Double Check Filler Valves for Delivery Truck Tanks and

Large Storage Containers
Designed to provide fast filling of bobtails, transports and large bulk storage tanks.
The 6587CD incorporates a swing-away lower check which greatly
reduces pressure drop across the valve. This lower pressure drop promotes faster filling rates and greater efficiency resulting in more profitable operations.

6587DC

7579S

Propane Liquid Capacity at Various

Differential Pressures (GPM)
Part
Number

ACME
Hose
Connection

Tank
Connection
M. NPT

Wrench
Hex
Flats

5
PSIG

25
PSIG

50
PSIG

75
PSIG

7579S

134"

112"

2"

44

62

98

139

170

6587DC*

2 14"

2"

2 78"

92

130

206

291

356

3197C

3 14"

3"

4"

148

210

332

470

575

* Swing-away lower back check valve design for higher filling rates.
NOTE: Multiply flow rate by .94 to determine liquid butane capacity.

68

10
PSIG

3197C

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Single Check Filler Valves for Storage Tanks with Supplementary Back Check Valves
Designed for use with RegO Back Check Valves to provide fast filling of
bulk storage tanks. Also may be used as a spare or replacement part.
These single check filler valves must never be installed directly into container couplings. They must be used with the appropriate back check
valve to comply with NFPA Pamphlet #58.

3174C

3194C, 6584C

Propane Liquid Capacity at Various

Differential Pressures (GPM)
Part
Number

ACME
Hose
Connection

Outlet
Connection
M. NPT

Wrench
Hex
Flats

3174C

134"

114"

134"

23

33

52

74

3176

6584C*

14

2 "

2"

2 38"

156

220

348

492

A3186

3194C

3 14"

3"

3 12"

147

208

329

465

A3196

5
PSIG

10
PSIG

25
PSIG

50
PSIG

For Use With

Back
Check Valve:

* Stem Assembly designed for higher filling rates.

NOTE: Multiply flow rate by .94 to determine liquid butane capacity.

Seal cap made of tough, resilient molded

plastic. Protects threads and internal working
parts. Caps are designed to contain normal
tank pressures, and must be kept on valves
at all times.

Vapor Equalizing Valves

General Information
RegO Vapor Equalizing Valves consist of an upper back check valve and
lower excess flow valve. In the closed position, the attachment of a vapor
hose coupling with its projecting nozzle, opens the back check valve to
permit flow in either direction. The lower excess flow valve is designed to
close automatically when flow out of the container being filled exceeds
the rated capacity. The valve closes automatically when the coupling is
removed. Like the double-check filler valves, the vapor equalizing valves
utilize a two-piece body construction. The lower excess flow valve will
permit some leakage when the upper back check valve is removed for
emergency repairs or replacement.

Long-wearing gasket permits hand-tight connection of cap and hose coupling.

Seat disc of special synthetic composition is
extra thick for longer life.
Valve guide is precision machined to assure
positive seal.

Spare Gasket Ordering Information

RegO Vapor Equalizing Valves are designed for use in both ASME and
DOT containers.

ACME

Part Number

114"

A2797-20R

134"

A2697-20R

Double Check Vapor Equalizing Valves for ASME and DOT Containers
Designed to facilitate loading operations by providing equalization of
pressures in the supply and storage containers. The supplementary
excess flow valve closes when the flow from the container being filled
exceeds a predetermined rate.
The 7573 Series is designed for use in bulk delivery systems and motor
fuel containers. The 3183AC is designed for use in delivery trucks and
other large containers.
Part Number

Basic

With Cap
& Chain

ACME
Hose
Connection

7573D

7573DC
3183AC

114"
134"

Tank
Connection
M. NPT

Wrench
Hex
Flats

Approximate Closing
Flow at 100 PSIG
Inlet Pressure
(SCFH/Propane Vapor)

34"
114"

114"
2"

4,100
10,000

69

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Single Check Vapor Equalizing Valves for ASME and
DOT Containers with Supplementary Excess Flow Valves
Designed for use with RegO Excess Flow Valves to facilitate loading
operations by providing equalization of pressures in the supply and storage containers. Also may be used as a spare or replacement part.
These vapor equalizing valves must never be installed directly into container couplings. They must be used with the appropriate excess flow
valve to comply with NFPA Pamphlet #58.
Part Number

Basic

With Cap
& Chain

ACME
Hose
Connection

Tank
Connection
M. NPT

Wrench
Hex
Flats

Approximate Closing
Flow at 100 PSIG
Inlet Pressure
(SCFH/Propane Vapor)

For Use With

Excess
Flow Valve:

3170

3180C

114"
134"

34"
114"

114"
134"

7,600
10,000

3272E
3282A

Back Pressure Check Valves

General Information
RegO Back Pressure Check Valves are designed to allow flow in one
direction only. The check, normally held in the closed position by a
spring, precludes the possibility of flow out of the container. When flow
starts into the container, the pressure overcomes the force of the spring
to open the check. When the flow stops or reverses, the check closes.

Metal-to-metal seats will allow slight leakage after closure. These valves
will restrict the escape of container contents in the event of accidental
breakage of the piping or fittings.

Back Pressure Valves for Container or Line Applications

Designed to provide protection of a container opening when desired flow
is always into the vessel. May be used in line applications where flow
must be limited to one direction.
When used with the appropriate single check filler valve, the combination
forms a double check filler valve suitable for use in filling of bulk storage
tanks.

A
Inlet
Connection
F. NPT

Part Number
Brass
3146
3146S*
3176

Steel
A3146

A3176
A3276BC*
A3186
A3196

B
Outlet
Connection
M. NPT

34

34

"

"

Propane Liquid Capacity at Various

Differential Pressures (GPM)

C
Wrench
Hex
Flats

D
Effective
Length
(Approx.)

5
PSIG

10
PSIG

25
PSIG

50
PSIG

1 38"

1 516"

11

16

25

36

1 38"
2 12"
2 716"
3 516"

28
32
124
297

40
45
175
420

63
73
276
664

89
103
391
939

114"

114"

2"

2"
3"

2"
3"

2 78"
4"

*Soft seat version.

NOTE: Multiply flow rate by .94 to determine liquid butane capacity and by .90 to determine liquid anhydrous ammonia capacity.

Swing-Away Back Pressure Check Valves for

Container or Line Applications
Designed to provide protection of a container opening when desired flow
is always into the vessel. May also be used in the line applications where
flow must be limited to one direction.
When used with the appropriate single check filler valve, the combination
forms a double check filler valve suitable for use in filling of bulk storage
tanks.
The swing-away check offers more efficient flow rates than conventional
designs. It swivels open vertically to reduce pressure drop across the
valve and improves flow rates.
Part
Number
Brass

Steel

6586C A6586D

Inlet
Connection
F. NPT

Outlet
Connection
M. NPT

Wrench
Hex
Flats

2"

2"

2 78"

NOTE: Multiply flow rate by .94 to determine liquid butane capacity.

70

Propane Liquid Capacity at Various

Differential Pressures (GPM)
5
10
25
50
PSIG
PSIG
PSIG
PSIG
190

270

420

600

RegO Excess Flow, Check, Filler, & Vapor Equalizing Valves

Sight Flow Indicators for Bulk Plants
Designed to promote maximum pump efficiency, these indicators enable
bulk plant operators to visually inspect liquid flow conditions. With glass
on both sides of the indicator, flow can be observed from either side,
even under some poor light conditions. The integral swing check also
serves as a back-check valve to prevent reverse flow and product loss if
the hose fails in a loading operation.
By installing an indicator on the upstream side of the plant pump, suction
conditions can be observed and the pump speed adjusted to obtain the
maximum possible flow rate without cavitation. Additionally, if an indicator
is installed in the piping at the loading rack, just ahead of the loading
hose, the operator can maintain a constant check on pump conditions.
Both installations are designed to allow for observation to provide maximum pump efficiency and assure safe plant pump operation.
In compressor operations a sight flow indicator installed in the liquid line
will give a visual indication when the tank car or transport is emptied.
Compressor operation can then be immediately reversed to start recovery of the vapor.

Part
Number
A7794

Inlet/Outlet
Connections
2" F. NPT

Length
5 34"

A7796

3" F. NPT

7 38"

NOTE: For fixed pipe installations only

Back Pressure Check Valves for Flanged Installation

Designed to provide high flow capacity and allow more efficient tank filling
than conventional designs. The unobstructed throat area reduces flow
turbulence through the valve, thereby reducing pressure drop. Large flow
channels and spacious side ports assure ample capacity for the most
demanding high capacity filling operations.
Propane Liquid Capacity at Various
The valve is designed for installation in internally threaded flanges in conDifferential Pressures (GPM)
tainer bottoms.
Part
Number
A3400L4
A3400L6

Flange
Connection
M. NPT
2"
3"

Wrench
Hex
Flats
Slotted

Overall
Length
5 14"
5 932"

5
PSIG
223
424

10
PSIG
316
600

25
PSIG
500
949

A3400L6

50
PSIG
707
1342

NOTE: For installation in flange tank connections with internal threads, see the Flanged Installation in Container section under Excess Flow Valves.
Multiply flow rate by .94 to determine liquid butane capacity and by .90 for liquid anhydrous ammonia capacity.

Chek-Lok Adhesive Warning Labels

DANGER
These adhesive warning labels are intended for application as close as
possible to the Chek-Lok once the Chek-Lok is installed.

WARNING

LP-GAS IS EXTREMELY
FLAMMABLE AND EXPLOSIVE
AVOID SERIOUS INJURY AND PROPERTY DAMAGE. IF YOU SEE, SMELL,
OR HEAR ESCAPING GAS... EVACUATE AREA IMMEDIATELY! CALL YOUR
LOCAL FIRE DEPARTMENT! DO NOT ATTEMPT TO REPAIR. DO NOT
STORE IN BUILDING OR ENCLOSED AREA. DO NOT USE ON HOT AIR
BALLOONS OR AIRCRAFT.

CAUTION!

Part Number

Description

7572-400

Adhesive Warning Label

Use this CHECK-LOK connection only for liquid evacuation before moving
tank in accordance with NFPA Pamphlet 58, which is the law in many states.
This publication is available from NFPA, Batterymarch Park, Quincy, MA
02269. Read and follow ECII product instruction number 7572FA-301.
DO NOT REMOVE, DEFACE OR OBLITERATE THIS LABEL.
DO NOT FILL THIS CONTAINER UNLESS THIS LABEL IS READABLE.
ADDITIONAL SAFETY INFORMATION IS AVAILABLE FROM

Engineered Controls
International, Inc.

100 RegO Drive PO Box 247 Elon College, NC 27244 USA

Printed in U.S.A. 03-0994-1189

Part No. 7572-400
Phone (336) 449-7707 Fax (336) 449-6594

www.regoproducts.com

71

RegO Internal Valves & Accessories

LP-Gas Internal Valves
Safety Warning
Purpose
In its continuing quest for safety, Engineered Controls International, Inc. publishes a series of bulletins
explaining the hazards associated with the use, misuse, and aging of LP-Gas valves and regulators. It is
hoped that these factual bulletins will make clear to LP-Gas dealer managers and service personnel, that
the utmost care and attention must be used in the installation, inspection, and maintenance of these products, or problems could occur which would result in injuries and property damage.
The National Fire Protection Association Pamphlet #58, Storage and Handling of Liquified Petroleum
Gases states in section 1-6 that In the interest of safety, all persons employed in handling LP-Gases shall
be trained in proper handling and operating procedures. These ECII Safety Warnings may be useful in
training new employees and reminding older employees of hazards that can occur.
It is recommended that all employees be furnished with a copy of NPGA Safety Pamphlet 306-88 LP-Gas
Regulator and Valve Inspection and Maintenance, 111-81 Limitations of Excess Flow Check Valves for LPGas, and 113-78 Safety Considerations in Bobtail Deliveries.

Nature of Warnings
It is recognized that warnings should be as brief as possible, but the factors involved in internal valve and excess flow valve failures to perform
are not simple. They need to be fully understood. If there is a simple
warning, it would be:
Make sure that the internal valves excess flow feature really
closes when the flow exceeds rated closing flow, and that the
valve will shut-off.
This bulletin is not intended to be an exhaustive treatment of internal
valves, and certainly does not cover all safety practices that should be
followed in installation, operation and maintenance of LP-Gas systems,
which include internal valves.
Internal valves must be closed on Cargo Vehicles when traveling on
public roads and highways. The valve should only be open when
pumping. Per MC 330 or 331, internal valves must also be equipped
with remote closure system, when used on transports or bobtails.
There are two types of internal valves being used on storage tanks,
transports and bobtails spring loaded internal valves and differential
pressure internal valves. They both provide positive shut-off when product is not being withdrawn and may include excess flow protection for
the system during transfer operations.

Spring Loaded Internal Valves

Spring loaded internal valves are manually opened by levers, by means
of fuse linked cable mechanisms or pneumatic or hydraulic actuators.
They incorporate an excess flow feature that will close the valve when the
flow through the valve exceeds its rate of flow. These valves should
never be locked open by means of wires, chains, pegs or other
devices.

Testing
Testing should be completed on a periodic basis.
1. To check operation of a spring loaded valve, activate the remote
control to close the valve while unit is pumping. If the meter indicator
flow continues, the valve should be repaired immediately.
2. Testing excess flow feature.
The National Propane Gas Association Safety Bulletin #113-78
states: In order to test an excess flow valve in a piping system, the
flow through the valve must be made to exceed the valves closing
rating.

72

This testing should only be attempted by trained personnel familiar with the process. If no one at the facility has experience in
proper testing, outside expert help should be obtained.
The exact procedure used may vary with the installation, advisability
of gas discharge and availability of equipment.
In general, most testing makes use of the fact that the excess flow
valves are surge sensitive and will close quicker under a sudden
flow surge than under steady flow. A sufficient surge can often be
created by using a quick open/close valve to control sudden,
momentary flow into a tank or piping section containing very low
pressure. An audible click from the excess flow valve (and corre-

RegO Internal Valves & Accessories

sponding stoppage of flow) indicates its closure.
A test involving venting gas to the atmosphere is hazardous and
may be impractical, or illegal.
Any test of any excess flow valve will not prove that the valve will
close in an emergency situation, due to reasons cited before. This
test will only check the valves condition, and the flow rate sizing for
those test conditions.
3. Tight Shut-Off A test should be made to insure the internal valve
will give a gas tight seal when the valve is in the closed position. This
will require removal of all product downstream from the internal valve,
to insure the valve will give 100% seal when in the closed position. If
the internal valve does not give 100% seal the valve should be
repaired immediately.

Pressure Differential Internal Valves

(Flomatics)
Pressure differential valves (Flomatics) open by pump pressure and close
when the pump stops.
These valves must never be locked open by means of wires, chains,
pegs or other devices.

Testing
Testing should be completed on a periodic basis.
1. To check operation of a differential pressure internal valve activate the
remote control shut-off valve while the unit is pumping. If the meter indicates that flow continues the valve should be repaired immediately.
2. Since the differential pressure internal valve requires at least 18 psi to
open and 8 psi over container pressure to keep open, a test may be
performed to check for closure. With the PTO disengaged, connect
delivery hose to a container with very low pressure. Then with hose
end valve open, engage PTO. The internal valve should remain
closed, no flow should be detected through the meter. If flow continues through the meter the valve should be repaired immediately.
3. Tight Shut-Off A test should be made to insure the internal valve
will give a gas tight seal when the valve is in the closed position. First
insure the pump prime valve is closed by turning clockwise until it
seats. Then with the valve closed (PTO disengaged) the product
downstream from the internal valve will have to be safely removed. If
the internal valve does not give 100% seal, the valve should be
repaired immediately.

sures are low and maintenance, as required, are essential.

Because ECII products have a long and proven record of quality and
service, LP-Gas dealers may forget the hazards that can occur because
an excess flow valve is used beyond its safe service life. Life of an excess
flow valve is determined by the environment in which it lives. The LPGas dealer knows better than anyone what this environment is.
NOTE: There is a developing trend in state legislation and in proposed national legislation to make the owners of products responsible for replacing products before they reach the end of their safe
useful life. LP-Gas dealers should be aware of legislation which
could effect them.

General Warning
All ECII Products are mechanical devices that will eventually become
inoperative due to wear, contaminants, corrosion and aging of components made of materials such as metal and rubber.
The environment and conditions of use will determine the safe service life
of these products. Periodic testing at least once a year when tank pres-

73

RegO Internal Valves & Accessories

Manual Internal Valves
A3200 Series
General Information
Manual Internal Valves are designed for a variety of uses in LP-Gas and
anhydrous ammonia service. In addition, accessories allow most of them
to be actuated manually, by cable or with air.
Installation, usage and maintenance of this product must be in compliance with all Engineered Controls International, Inc. instructions, as well
as requirements and provisions of NFPA # 58, DOT, ANSI, and all applicable federal, state, provincial, and local standards, codes, regulations
and laws.

These valves must remain in the closed position except during product
transfer. A line break downstream of the pump may fail to actuate the
excess flow valve as the pump may limit flow. If break occurs in the system, or the excess flow closes, immediately shut down the system.
Inspection and maintenance on a periodic basis is essential. Installation
and maintenance must be performed only by qualified personnel.
Be sure all instructions are read and understood before installation and
operation of these valves.

How The Valves Work

Refer to the drawings. View A shows the valve held closed without
leakage by tank pressure and the valves closing spring. Actuation of the
operating handle alone does not open the valve, it only allows pressure to
equalize between the inlet and outlet of the valve by rapid bleeding of the
product downstream. This equalized pressure then allows the valve to
open via the internal spring.
The valve opens by moving the handle to mid-point, see view B. This
position allows the actuator to put the equalizing portion of the valve
stem in the pilot opening, allowing more product to bleed downstream
than if the handle was fully open.
In a few seconds, the tank and downstream pressure will be nearly equal.
The excess flow spring will push the main poppet to the open position,
see view C, the handle should then be moved to the fully open position.
If at first, the handle is quickly moved to the fully opened position, the
pilot valve allows a small amount of bleed downstream, but much less
than during rapid bleed (view B). This results in a longer pressure equalizing time before the main valve can open.

5. Always keep valve closed except during product transfer.

6. Completely open all valves during pumping. Partially closed or throttle type valves may prevent excess flow valve from closing when
required, even in a properly designed piping system.
7. All personnel must be aware of remote closure locations and their
operation in case of emergency. They must also be aware of the
equalizing opening through which bleeding can occur after the
excess flow valve closes. If this bleed is not stopped by closing a
downstream valve, a hazard may occur.
8. Never, under any circumstances, permanently wire open the operating handle of the internal valve.

NOTE:

Troubleshooting

The main poppet will not open until outlet pressure approximates tank pressure!
Once the main poppet is open, flow greater than the excess flow rating,
or a sufficient surge in flow, forces the main poppet closed against the
excess flow spring, as seen in view D. The pilot valve in this position is
open and allows a small amount of bleed downstream, but much less
than during rapid bleed (view B).
When the operating handle is moved to the closed position, the valve
closes and a leak-tight seal is re-established as seen in view A.
NOTE:
To provide excess flow protection, the flow rating of the pump,
piping, valves, fittings, and hose on the inlet and outlet sides of
the valve must be greater than the flow rating of the valve. Any
restrictions that reduce the flow to less than the excess flow
valve rating will result in the excess flow valve not operating
when required.

Valve Operation and Precautions

1. Valve must be opened before starting pump, and before opening
valve on pump outlet.
2. Leave pumping system wet to avoid drying of seals and to reduce
time involved in opening valve. Drain piping only when required by
codes or safe operating practices.
3. When piping is dry or at lower pressure than the tank, open valve halfway for a few seconds to allow line pressure to equalize before fully
opening the valve handle. The main poppet may not open immediately if the handle is placed in the open position too quickly.
4. Flow surges may close the built-in excess flow valve and should be
avoided. If the valve slams shut, immediately stop the pump, close
the nearest downstream valve, and move handle to midpoint position
to equalize pressure until valve reopens with a click, then restart
pump and open downstream valve slowly.

74

Cable Control System

The cable control system employed must meet the requirements and
be in accordance with the provisions of NFPA #58, DOT, ANSI, and all
applicable federal, state, provincial and local codes.

1. Internal Valve Will Not Open.

Causes may be excess leakage downstream, pump engaged too
quickly, excessive wear of valve, or ice freezing of poppet.
When there is excessive volume downstream, a greater amount of
time is required to equalize tank and downstream pressure.
To determine if the pilot seat is opening, install a pressure gauge
downstream of valve outlet, open any hand valves between valve
and pressure gauge, and open valve. Pilot seat is not opening if pressure does not build up to tank pressure. Perform this test with pump
off. A broken internal part may cause pilot seat not to open.
If operating handle rotates past the full open position, there is internal
malfunctioning, and the valve must be disassembled and repaired.
2. Premature Valve Closure.
First, check to see that operating lever is properly connected and fully
opens valve. Premature closure may also be a result of engaging
pump too quickly, sudden line surges, an underrated excess flow
spring or an obstructed inlet port.
3. Valve Will Not Close.
Usually a result of faulty or sticking actuator. First, check the actuator
to see that it works freely by disconnecting it from valve handle and
cycling it several times. Also, operate valve handle manually. If it sticks
in the open position, replace the packing and bushings. This should
free the operating mechanism providing the valve has no internal
damage.
4. Low Flow Capacity
Downstream piping may be too small and/or long, screen or strainer
may be plugged, possible restriction downstream, or a bypass valve
stuck in the open position are causes of low flow. Also, the bypass
valve may be set too low and prematurely opening. Check for high
differential pressure across the bypass valve. If bypass valve is open,
the differential across the valve should not exceed 5 to 6 psig.

RegO Internal Valves & Accessories

Maintenance
Potential problems may be eliminated with preventive internal valve maintenance. Perform the following steps once a month:
1. Check to see that the operating lever moves freely and smoothly.
There should be no leakage around the lower stem or seal housing.
Leakage requires replacement of the seal housing packing. A sticking
lever indicates trapped foreign material or mechanism wear.
2. Check both seat discs for tight closure. Close valve and exhaust
downstream pressure. Be sure piping is warmed to an ambient temperature. Close the first downstream valve and note pressure buildup
between the closed valves with a pressure gauge. If leakage occurs,
replace both seat discs.

3. Inspect, clean and oil all operating controls. Check controls to see
that they open fully, but do not overtravel the valve operating lever.
See that they work freely to close the valve. Worn parts should be
replaced.
4. Remove valve if the tank is to be steam cleaned. Heat may damage
the valves seals.
5. Valve is not designed for water service. After tank is hydrostatically
tested, immediately remove all water and allow tank to thoroughly dry
out before installing valve.

D
Limited
Bleed

Bleed

Limited
Bleed

Bleed
Flow

Flow

A3209R Series, 114" Straight

A3212R Series, 2" Straight
A3213A Series, 3" Straight
A3212RT Series 2 Tee Body
A3213T Series 3 Tee Body

Fully Open

Rapid Bleed

Fully` Closed

Bleed

Bleed

Flow

Flow

Excess Flow
Closed

Limited
Bleed

Limited
Bleed

A3210A Series, 114" Angle

Rapid Bleed

A3217F Series, 3" Flanged

A3217DF Series,
3" Double Flanged

Bleed

Bleed

Fully
Open

Bleed

Rapid
Bleed

Flow

Fully
Open

Limited
Bleed

Excess
Flow
Closed

A3219F Series, 4" Flanged

Fully
Closed

Limited
Flow Bleed

Flow

Bleed

Rapid
Bleed

Fully
Closed

Excess Flow
Closed

Fully Open

Fully Closed

Flow

Limited
Bleed

Limited
Bleed

Excess
Flow
Closed

75

RegO Internal Valves & Accessories

114" Threaded Internal Valve for Small Capacity Pumping
Systems and Bobtail Vapor Equalization
Designed primarily for use with LP-Gas and anhydrous ammonia as a
main valve on small capacity pumping systems, NH3 nurse tanks and inline installations. It may also be installed in the vapor equalizing opening
on bobtail delivery trucks. Installation is quick and easy, and it fits in both
full and half couplings, as well as, in-line applications. The valve may be
actuated manually by hand or cable.

A3209TL

A3209PA
A3209R

LP-Gas Vapor Capacity**

(SCFH/Propane)

Closing Flow
(GPM)

Accessories

Part
Number

Inlet
Connection
M. NPT

Outlet
Connection
F. NPT

LP-Gas

NH3

25 PSIG
Inlet

100 PSIG
Inlet

Thermal
Latch

Pneumatic
Actuator

A3209R050

114"

114"

50

45

13,300

22,900

A3209TL

A3209PA

A3209R080

14

14

80

72

15,700

26,700

A3209TL

A3209PA

1"

1"

*Installs in full or half coupling.

**Data for flow in half coupling.

114" Threaded Angle Internal Valve for

Motor Fuel Dispensers and Small Capacity Pumping Systems
Designed primarily for use with LP-Gas and anhydrous ammonia as a
main valve on pump systems with small capacity, such as motor fuel dispensers. It may also be installed in bottom liquid withdrawal openings in
NH3 nurse tanks or the vapor equalizing opening of bobtail delivery
trucks. Installation is quick and easy, and must be installed in a modified
half coupling or the equivalent. The valve may be actuated manually by
cable or pneumatically.

A3210PA
LP-Gas Vapor Capacity
(SCFH/Propane)

Closing Flow
(GPM)

Accessories

Part
Number

Inlet
Connection
M. NPT

Outlet
Connection
F. NPT

LP-Gas

NH3

25 PSIG
Inlet

50 PSIG
Inlet

75 PSIG
Inlet

100 PSIG
Inlet

Pneumatic
Actuator

A3210A065

114"

114"

65

58.5

17,000

22,250

26,500

30,000

A3210PA-R1

* For use in half coupling only, 112" diameter minimum bore. If welded-in dip pipe is required, use of 112" schedule 40 pipe is recommended flow will
be reduced by approximately 10%.

3" Flanged Internal Valve for Bobtail Delivery

Trucks, Transports, and Large Stationary Storage Tanks
Designed primarily for LP-Gas and anhydrous ammonia filling and/or
withdrawal on MC331 bobtail delivery trucks, transports and stationary
storage tanks with flanged pumps or piping. Installation is quick and
easy, and the valve may be operated manually by cable or pneumatically.
Lever available on right or left side to allow for installation without the use
of an extra pulley.
Part
Number
Single Flange
Body
A3217FR160
A3217FL160
A3217FR210
A3217FL210
A3217FR260
A3217FL260
A3217FR410
A3217FL410

Double Flange
Body
A3217DFR160
A3217DFL160
A3217DFR210
A3217DFL210
A3217DFR260
A3217DFL260
A3217DFR410
A3217DFL410

Operating
Lever
Position
Right Side
Left Side
Right Side
Left Side
Right Side
Left Side
Right Side
Left Side

* Valve supplied with 16 nuts and 8 studs for mounting.

** Modified bore = 458" diameter with 534" diameter raised face.

76

A3217FPA

Closing Flow
GPM
Inlet
Connection

3" 300#
ANSI RF
Modified
Flange**

Outlet
Connection

3" 300#
ANSI RF
Flange

Accessories

LP-Gas

NH3

160

145

210

190

260

236

410

372

Pneumatic
Actuator
A3217FPA
A3217FLPA
A3217FPA
A3217FLPA
A3217FPA
A3217FLPA
A3217FPA
A3217FLPA

RegO Internal Valves & Accessories

4" Flanged Internal Valve for Transports and
Large Stationary Storage Tanks
Designed primarily for LP-Gas and anhydrous ammonia service on
MC331 transport pressure vessels and large stationary storage tanks.
Installation is quick and easy, and it fits in most existing tank flanges. The
valve may be actuated manually or pneumatically.
Use of the A3219RT Remote Thermal Release with this valve is suggested to provide a remote means of mechanical closure along with thermal
protection, as required by DOT MC331.

A3219FPA

Accessories
Closing Flow
GPM
Part
Number*

Inlet
Connection

Outlet
Connection

A3219F600L

4" 300#
ANSI RF
Modified
Flange**

4" 300#
ANSI RF
Flange

LP-Gas

NH3

Pneumatic
Actuator

600

544

A3219FPA

Remote
Thermal
Release
A3219RT
(2)

* Valve supplied with 16 nuts and 8 studs for mounting.

** Modified bore = 578" diameter with 7" diameter raised face.

Remote Thermal Release for DOT MC331 Pressure Vessel

Designed especially for use with Internal Valves installed in DOT MC331
pressure vessels. The A3219RT provides a remote means of mechanical
closure along with thermal protection, as required by DOT MC331.
The A3219RT is connected by cable to the internal valve(s) on the vessel.
In the event of extreme heat (over 212 F.), the fuse link will melt, causing
the spring to contract and pull the cable. When properly installed the
cable will trip the internal valve release lever(s) allowing the connected
handle(s) to move to the closed position.

Part
Number
A3219RT

For
Use
With
Internal
Valves

Fully
Release
Temperature Extended

After 4"
Travel

Minimum
Number
Required
by MC331

100 lbs.

50 lbs.

Spring Load

212 F.

Remote Cable Controls for Internal Valves

The 3200C Remote Cable Kit is designed especially for use with the
3200L Remote Operating Lever to operate internal valves from a remote
location.
The internal valve is opened by pulling back the remote operation lever
and closed by returning the lever to its original position. A remote release
is provided to close the internal valve from a different remote location.

Part
Number

Description

Contents

3200C

Remote Cable Kit

100 Foot Cable, 6 Cable Clamps, Quick

Link, Sign, Fuse Link, Steel Nut
and Bolt.

3200L

Operating Lever

Lever Assembly

77

RegO Internal Valves & Accessories

Flomatic Internal Valve Operation

Screen Mesh Filter

X-Ring Seal
Visual Indicator

General Information
RegO piston type Flomatic Internal Valves are normally closed and use
pressure differential to provide completely automatic service. Mounted
directly between the tank body and pump, the Flomatic uses the pressure
differential developed by the pump to open the valve and it closes automatically when the differential no longer exists.
This means the RegO Flomatic opens when the pump is on and closes
when the pump is shut off fully automatic.

1
Inlet Ports

Inlet Port
Priming Channel

External Filter

Piston

Internal Filters

Priming
Channel

A
Piston
E

Pilot
Stem
B
D

1
4"
Pump
Discharge
Line

Pump
C

1. Normally Closed

2. Pump On Valve Opening

When the valve is closed, liquid flows into the INLET

PORTS, through a channel in the PISTON, and into
area A. It also flows down through the PRIMING
CHANNEL in the valve body, into area B beneath
the valve seat, and into area C to prime the PUMP.

When the pump is started, differential pressure transmits through the 14" piping into chamber D. lifting the
PILOT STEM. This opens the seat between the stem
and piston at E. Pump suction then evacuates the
tank pressure in area A, which becomes equal to the
pump suction pressure.

X-Ring
Seal
Piston

Piston
Spring

Pilot
Stem

E
Indicator
Slot

Indicator
Slot

Pilot Stem

No. 60
Drill
Orifice
D

78

3. Pump On Valve Open

4. Pump Off Valve Closes

The force below the pilot stem forces the piston up

to open the valve; rotating the INDICATOR SLOT to
its vertical (valve open) position. Pump differential
pressure in area D holds the PILOT STEM and PISTON open. Approximately 20 psig pump differential
pressure is required to open the valve; approximately 8 psig differential pressure will hold the valve
open.

With the pump shut off, the pressure in area D which

holds the valve open, bleeds out through the #60
DRILL ORIFICE. This loss of pressure permits the
SPRING to push the PILOT STEM down to reseat at
point E. Since pressures are equal above and below
the PISTON, with no sustaining pressure in area D,
the SPRING forces the valve closed. The INDICATOR SLOT rotates to the horizontal (valve closed)
position.

RegO Internal Valves & Accessories

Flomatic Internal Valves for Bobtail Delivery
Trucks, Transports and Large Stationary Storage Tanks
Designed primarily for LP-Gas and anhydrous ammonia liquid withdrawal on MC331 bobtail delivery trucks, transports and large stationary storage containers with flanged connections. The valve is fully automatic,
opening and closing as the pump is turned on or off.

A7853A 14" Three-Way

Quick-Acting Valve

Part
Number
A7883FK
A7884FK

Inlet
Connection
ANSI Flange
3"-300#**
4"-300#***

Outlet
Connection
ANSI Flange
3"-300#
4"-300#

Strainer
Width
4 34"
5 34"

Base
Width
8 14"
10"

Accessories
(Included with Flomatic)

Height
Overall
from
Height Indicator
(Approx.) To Base
10 78"
4 1316"
11 14"
4 1516"

Filter

3-Way
Valve

A7884-201

A7853A

*Supplied with A7853A 3-way valve, A7884-201 filter, studs, nuts and gaskets.
** With 41316" diameter bore.
*** With 51316" diameter bore.

Threaded Internal Valves For Bobtail Delivery Trucks, Transports

and Stationary Storage Tanks
Application
Designed primarily for use with LP-Gas and anhydrous ammonia for liquid
withdrawal; vapor transfer or vapor equalization of bobtail delivery trucks,
transports, stationary storage tanks, and in-line installations. The valve may
be operated manually by cable or pneumatically.

Part
Number
A3212R105
A3212R175
A3212R250
A3213A150
A3213A200
A3213A300
A3213A400

Inlet
Connection
M. NPT

Outlet
Connection
F. NPT

2"

2"

3"

3"

A3213PA

Closing Flow (GPM) Closing Flow (GPM)

Half Coupling
Full Coupling
LP-Gas
LP-Gas
NH3
NH3
105
95
65
59
175
158
100
90
250
225
130
117
150
135
125
113
200
180
160
144
300
270
250
225
400
360
325
293

A3213TL

Accessories
Pneumatic
Thermal
Actuator
Latch

A3213PA

A3213TL

Threaded Internal Valves For Bobtail Delivery Trucks, Transports

and Stationary Storage Tanks
Application
Designed primarily for use with LP-Gas and anhydrous ammonia for liquid
withdrawal; vapor transfer or vapor equalization of bobtail delivery trucks,
transports, stationary storage tanks, and in-line installations. The valve may
be operated manually by cable or pneumatically.

Part
Number
A3212RT105
A3212RT175
A3212RT250
A3213T150
A3213T200
A3213T300
A3213T400

Inlet
Connection
M. NPT

Outlet
Connection
F. NPT

2"

2"

3"

3"

A3213PA

Closing Flow (GPM) Closing Flow (GPM)

Half Coupling
Full Coupling
LP-Gas
LP-Gas
NH3
NH3
105
95
65
59
175
158
100
90
250
225
130
117
150
135
125
113
200
180
160
144
300
270
250
225
400
360
325
293

A3213TL

Accessories
Pneumatic
Thermal
Actuator
Latch

A3213PA

A3213TL

79