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Table of Contents Introduction
General Description.................................................................................IFC Designed to provide customers with the widest selection of
Ordering Information & Numbering System................................................1 sizes, orifices and construction materials, Series 2700 meets
Bill of Materials-Conventional.....................................................................2
the exacting demands of the process industry.
Bill of Materials-Balanced Design...............................................................3
Selection Table: O-Ring Design...................................................................4 Superior Design
Selection Tables – Conventional Design A single design handles air, steam, vapor and liquid services.
U.S. Customary Units Maximum interchangeability of parts affords easy maintenance
Threaded Connections.........................................................................4 and lower costs.
Flanged Connections...........................................................................5 Fixed blowdown design simplifies testing and repair. Maximum
Selection Tables – Balanced Design blowdown of 5% to 15% regardless of service.1
U.S. Customary Units A built-in lift stop ensures stable performance.
Threaded Connections.........................................................................6 Balanced design in “C” and “D” orifices nullifies the effects of back
Flanged Connections...........................................................................6 pressure on set point.
Special Materials......................................................................................7
ASME Code Certification
Capacity Tables – U.S. Customary Units Manufactured in conformance to Section VIII of the ASME Boiler and
Air.......................................................................................................8 Pressure Vessel Code for air, steam, and water service.
Steam.................................................................................................8 Capacities certified by The National Board of Boiler and Pressure
Water..................................................................................................9 Vessel Inspectors.
Selection Tables – Conventional Design Optional O-Ring Seat Design
Metric Units
O-ring seat design available for maximum seat tightness.
Threaded Connections....................................................................... 10
Flanged Connections.........................................................................11 Teflon® available at higher pressures to provide the same zero bubbles
per minute leakage as elastomer O-ring seats.
Selection Tables – Balanced Design
Metric Units Comprehensive Product Line
Threaded Connections....................................................................... 12 Set pressures from 15 psig to 6500 psig with orifice areas from
Flanged Connections......................................................................... 12 0.068 to 0.573 sq. in.

Capacity Tables – Metric Units Standard valves have MNPT inlet x FNPT outlet. Optional female
Air...................................................................................................... 13 inlet thread, flanged, socket weld, welding nipple, and sanitary
Water................................................................................................. 13 connections available.
Steam................................................................................................ 14 Maximum Selection of Materials
Cap Constructions.................................................................................... 14 Standard construction includes 316 stainless steel body, trim and
Dimensions & Weights.........................................................................15-16 spring, with carbon steel bonnet.
Other Farris Engineering Valves................................................................ 17 Optional materials include Monel®, Hastelloy C®, and materials
suitable for NACE service.

Warranty
All products manufactured by Farris Engineering are warranted free of defects
in material and workmanship when used within the range recommended for
a period of one year after installation or eighteen months from delivery. When
authorized, any defective product may be returned to the factory and if found
defective will be repaired or replaced free of charge, solely at the discretion of
Farris Engineering, ex-works our factory. No charge for labor or other expense
incurred will be allowed, as the liability of Farris Engineering is measured by
the refund price of the defective product only. All warranties are based on
the product being used within the range recommended and does not cover
damages or defects due to normal wear and tear, misuse, alteration or neglect.
General Notes: The purchaser shall determine the suitability of the product for use and
1. Blowdown on liquid service may slightly exceed 15% in certain applications. assumes all risks and liabilities in connection therewith.

Teflon is a registered trademark of the DuPont Company. This warranty does not cover the performance of valves tested at site on
Monel is a registered trademark of Inco Alloys International Inc. test equipment that is not to the same technical standard as that used by
Hastelloy and Hastelloy C are registered trademarks of Haynes International Inc. the manufacturer.
Numbering System
Selecting and specifying Farris pressure relief valves is simple using the numbering system that follows.
Each digit of the type number has a distinct significance. The digits describe the basic valve series, orifice, seat design,
inlet temperature range, body, bonnet and spring material, inlet type and pressure rating.

27 D A 2 3 H– M 2 0 /S4
Series Orifice Seat Special Cap Special
Number Area Construction5 Inlet Size1 Outlet Size1 Variations Inlet Connections6 Construction Test Gag 2 Materials
27 US A Metal Seat 1 1/2" 3 1" H High pressure M MNPT 2 Plain 0 No Gag S4 Complete
Customary variations of 316 St. St.
Units C Soft Seat 2 3/4" 4 1-1/2" standard types F FNPT 4 Packed Lever 1 Test Gag
Sq. In. N1 NACE Trim:
C 0.068 T Teflon Seat 3 1" 5 2" B Balanced 7 Open Lever Standard
design3 1 Flanged-150RF
D 0.125 4 1-1/2" 6 2-1/2" N4 NACE Trim:
D Heat transfer 2 Flanged-300RF All St. St.
E 0.223 fluid standard
pressure 3 Flanged-600RF M1 Monel Body
F 0.350 & Disc
E Heat transfer
fluid high 4 Flanged-900RF
G 0.573 M2 Monel
pressure Internals
5 Flanged-1500RF
Metric
mm2 M4 Complete
6 Flanged-2500RF Monel
C 43.87
H1 Hastelloy C
D 80.65 O Special
Body & Disc
E 143.87 S Socket Weld H2 Hastelloy
C Internals
F 225.81 T Sanitary Inlet
H4 Complete
G 369.68 Hastelloy C
V VCR Inlet
D ( )4 Duplex/
W Welding Nipple Super
duplex
X Special Hub
Connections *Add “N” for
NACE e.g. M4N,
H4N, etc

Ordering Information
Please specify the following so that we may process your order as quickly as possible.

1. Quantity.* 8. Operating and relieving temperatures.*

2. Inlet and outlet sizes. 9. Allowable overpressure.*
3. Farris type number.* 10. Fluid and fluid state.*
4. Inlet and outlet connections: MNPT, FNPT, flanged, 11. Backpressure, superimposed constant and/or variable, and built-up.*
socket weld, sanitary inlet or welding nipple. 12. Required capacity.*
5. Materials of construction if other than standard. 13. Accessories: open or packed lever if required; test gag.
6. O-ring seat pressure seal material, if required. 14. Code requirements, if any.
7. Set pressure.*
1
*As a customer service, we verify your selection and sizing. In order to do this, we must have this information.
General Notes:
1. Not all combinations of inlet and outlet sizes shown are available. Consult the selection tables of pages 4 and 5.
2. Test gag option is not available with open lever cap.
3. Available in O-ring seat design only. Consult the Farris factory.
4. Duplex (D4) and Super Duplex (D8) available.
5. Selection of proper soft good material is customer’s responsibility.
6. Ring joint and lens joint inlets available on application. Add “/SP” to the standard flanged valve type number.
 2700 Series – Conventional
Bill of Materials – Conventional
Item Part Name Standard Material
SA-351 Gr. CF8M St. St. or
Complies with ASME 1 Body
SA-479 Type 316 St. St.
Boiler & Pressure Vessel
Code, Section VIII 2 Bonnet SA-216 Gr. WCB, Carb. St.
3 Disc 316 St. St.
4 Guide 316 St. St.
5 Disc Holder 316 St. St.
6 Stem 316 St. St.
7 Spring Adj. Screw 316 St. St.
9 8 Jam Nut 316 St. St.
9 Cap, Plain Screwed Carbon Steel
8 10 Cap Gasket 316 St. St.
7 11 Body Gasket 316 St. St.
12 Guide Gasket 316 St. St.
15
10 13 Spring Stainless Steel
14 Spring Buttons 316 St. St.
15 Wire Seal St. St. Wire / Lead Seal
14 16 Nameplate (Not Shown) Stainless Steel
17 Welding Nipple (Inlet) 316 St. St.
18 Welding Nipple (Outlet) Carbon Steel
19 Lap Joint Stub End (Inlet) 316 St. St.
20 Lap Joint Stub End (Outlet) Carbon Steel
21 Lap Joint Flange (Inlet) Carbon Steel
13
22 Lap Joint Flange (Outlet) Carbon Steel

O-Ring Retainer

O-Ring Seat Seal

6
4

5
3

12 Retainer Lockscrew

11 O-Ring Design
(Optional)
2

1
20

18
2

22 19
17
21
Welded End Design Flanged Design
(Optional) (Optional)
2700 Series – Balanced Design
Do you have variable back pressure? Can’t use a balanced bellows
design? Farris has the solution with the Series 2700 Balanced Design
pressure relief valve. The balanced effect is achieved by isolating the
Complies with ASME upper valve chamber and eliminating any back pressure build-up in the
Boiler & Pressure Vessel bonnet affecting valve set pressure.
Code, Section VIII
13 These valves are available in 1/2", 3/4" and 1" inlet sizes with a 1" outlet
10 and two orifice areas. Pressure ranges from 15 to 1480 psig, standard soft
seat design. Flanged and welded inlet and outlet connections are available
with the same material options as the standard design.

11 Bill of Materials – Balanced Design

Item Part Name Standard Material
12
SA-351 Gr. CF8M St. St. or
1 Body
19 SA-479 Type 316 St. St.
2 Bonnet SA-216 Gr. WCB, Carb. St.
14 3 O-ring Retainer 316 St. St.
4 O-ring Seat Seal Viton®
5 Retainer Lock Screw 304 St. St.
18 6 Guide 316 St. St.
7 Guide Seal Viton
8 Disc Holder 316 St. St.
17 9 Disc Holder Seal Viton
10 Stem 316 St. St.
11 Spring Adj. Screw 316 St. St.
12 Jam Nut 316 St. St.
13 Cap, Plain Screwed Carbon Steel
Bonnet Vent 14 Cap Gasket 316 St. St.
15 Body Gasket 316 St. St.
2 16 Guide Gasket 316 St. St.
17 Spring Stainless Steel
7 18 Spring Buttons 316 St. St.
6 19 Wire Seal St. St. Wire/Lead Seal
9 20 Nameplate (Not Shown) Stainless Steel
8
5
4 Series 2700 Back Pressure Correction Factor,
3 Balanced Design
1.2
16
Back Pressure Correction Factor

1
15
Kb (Gas) Kw (Liquid)

0.8

1 0.6

0.4

0.2
3
General Notes: 0
1. Other O-ring materials available. Consult the factory. 0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80%
2. Flanged, socket weld, welding nipple and female inlet threaded designs available. Percent Back Pressure
3. Temperature for balanced or O-ring seat design is limited by the elastomer selected. See page 4.
Viton is a registered trademark of DuPont Elastomers.
 O-Ring Selection
The 2700 Series is available with an optional O-ring seat which minimizes fugitive emissions and costly product loss. This optional
seat construction provides zero bubbles per minute leakage at 90% of set pressure per API Standard 527. The tables below list the set pressure
and temperature range for both the elastomer and PTFE seat options.

O-Ring Seat Valve Pressure & Temperature Limits

Pressure Range, psig1 Pressure Range, barg1
Orifice
Elastomer Seat PTFE Seat Elastomer Seat PTFE Seat
C 15 to 1480 800 to 2500 1.0 to 102 55.1 to 172
High Pressure — 2501 to 5000 — 172.1 to 345
D 15 to 1480 800 to 1600 1.0 to 102 55.1 to 110
High Pressure — 1601 to 5000 — 110.1 to 345
E 15 to 1480 600 to 2500 1.0 to 102 41.3 to 172
F 15 to 1480 600 to 1600 1.0 to 102 41.3 to 110
G 15 to 1000 200 to 1000 1.0 to 69 14 to 69

Material Availability
Temperature Range2
Material
°F °C
Viton®5 -15° to +400° -26° to +204°
Buna N - 30° to +250° -34° to +121°
EPDM -70° to +300° -57° to +149°
Silicone -65° to +450° -54° to +232°
Kalrez - 20° to +500° -29° to + 260°
PTFE -320° to +500° -195° to +260°

General Notes:
1. Maximum O-ring set pressure limit cannot exceed the pressure limit for a given type number and size as indicated in the metal seat selection tables.
2. Temperature range may vary depending on service fluid.
3. Ethylene propylene is suitable for steam service up to 300°F, PTFE up to 500°F.
4. Consult the Farris factory for other materials.
5. We reserve the right to substitute comparable fluorocarbon materials from other manufacturers.

Selection Table – Conventional Design (see notes on page 5)

Threaded Connections – MNPT x FNPT, U.S. Customary Units
Orifice Area Valve Size Maximum Set Pressure, psig Max. Back Pressure Materials
Type Number
Sq. In. Inlet x Outlet -20°F to 750°F psig at 100°F Body / Bonnet Spring
1/2 x 1 27CA13-M20 1600
3/4 x 1 27CA23-M20 2500
316 St. St./ Stainless
0.068 3/4 x 1 27CA23H-M20 5000 400
Carb. St. Steel
1x1 27CA33-M20 2500
1x1 27CA33H-M20 6500
1/2 x 1 27DA13-M20 1600
3/4 x 1 27DA23-M20 1600
316 St. St./ Stainless
0.125 3/4 x 1 27DA23H-M20 5000 400
Carb St. Steel
1x1 27DA33-M20 1600
1x1 27DA33H-M20 5000
316 St. St./ Stainless
0.223 1 x 1-1/2 27EA34-M20 2500 400
Carb. St. Steel
4 316 St. St./ Stainless
0.350 1-1/2 x 2 27FA45-M20 1600 400
Carb. St. Steel
316 St. St./ Stainless
0.573 1-1/2 x 2-1/2 27GA46-M20 1000 400
Carb. St. Steel

Kalrez is a registered trademark of DuPont Elastomers.

Selection Table – Conventional Design
Flanged Connections, U.S. Customary Units
ASME Flange Class Maximum Set Pressure, psig Max. Back Materials
Orifice
Valve Size Pressure
Area Type Number -20°F to Body /
Inlet x Outlet Inlet RF Outlet RF 400°F 750°F psig at Spring
Sq. In. 100°F Bonnet
100°F
150# 150# 27CA13-120 285 200 95 285
300# 150# 27CA13-220 740 635 505 285
600# 150# 27CA13-320 1480 1265 1010 285 316 St. St./ Stainless
1/2 x 1
900# 300# 27CA13-420 2220 1900 1510 400 Carb. St. Steel
1500# 300# 27CA13H-520 3705 3170 2520 400
2500# 300# 27CA13H-620 5000 5000 4200 400
150# 150# 27CA23-120 285 200 95 285
300# 150# 27CA23-220 740 635 505 285
600# 150# 27CA23-320 1480 1265 1010 285 316 St. St./ Stainless
0.068 3/4 x 1
900# 300# 27CA23-420 2220 1900 1510 400 Carb St. Steel
1500# 300# 27CA23H-520 3705 3170 2520 400
2500# 300# 27CA23H-620 5000 5000 4200 400
150# 150# 27CA33-120 285 200 95 285
300# 150# 27CA33-220 740 635 505 285
600# 150# 27CA33-320 1480 1265 1010 285 316 St. St./ Stainless
1x1
900# 300# 27CA33-420 2220 1900 1510 400 Carb. St. Steel
1500# 300# 27CA33H-520 3705 3170 2520 400
2500# 300# 27CA33H-620 6170 5280 4200 400
150# 150# 27DA13-120 285 200 95 285
300# 150# 27DA13-220 740 635 505 285 316 St. St./ Stainless
1/2 x 1
600# 150# 27DA13-320 1480 1265 1010 285 Carb. St. Steel
900# 300# 27DA13H-420 2220 1900 1510 400
150# 150# 27DA23-120 285 200 95 285
300# 150# 27DA23-220 740 635 505 285
600# 150# 27DA23-320 1480 1265 1010 285 316 St. St./ Stainless
3/4 x 1
900# 300# 27DA23H-420 2220 1900 1510 400 Carb. St. Steel
0.125
1500# 300# 27DA23H-520 3705 3170 2520 400
2500# 300# 27DA23H-620 5000 5000 4200 400
150# 150# 27DA33-120 285 200 95 285
300# 150# 27DA33-220 740 635 505 285
600# 150# 27DA33-320 1480 1265 1010 285 316 St. St./ Stainless
1x1
900# 300# 27DA33H-420 2220 1900 1510 400 Carb. St. Steel
1500# 300# 27DA33H-520 3705 3170 2520 400
2500# 300# 27DA33H-620 5000 5000 4200 400
150# 150# 27EA34-120 285 200 95 285
300# 150# 27EA34-220 740 635 505 285 316 St. St./ Stainless
0.223 1 x 1-1/2
600# 150# 27EA34-320 1480 1265 1010 285 Carb. St. Steel
900# 300# 27EA34-420 2220 1900 1510 400
150# 150# 27FA45-120 285 200 95 285
316 St. St./ Stainless
0.350 1-1/2 x 2 300# 150# 27FA45-220 740 635 505 285
Carb. St. Steel
600# 150# 27FA45-320 1480 1265 1010 285
150# 150# 27GA46-120 285 200 95 285
316 St. St./ Stainless
0.573 1-1/2 x 2-1/2 300# 150# 27GA46-220 740 635 505 285
Carb. St. Steel
600# 150# 27GA46-320 1000 1000 1000 285

General Notes:
1. Available with optional elastomer or Teflon seat design as illustrated. Change the fourth digit of the type number from “A” to “C” for soft seat, “A” to “T” for Teflon.
Example: 27DC23-M20 for soft seat, 27DT23-M20 for Teflon. See Selection Table for pressure and temperature limits.
2. Above type numbers indicate standard materials of construction. To select corrosive or low temperature materials, add type number suffix as indicated on pages 1 and 7.
3. Available in materials suitable for sour gas (H2S) service to NACE Standards MR0103 and MR0175 / ISO 15156. Add “N1” (standard materials) or “N4” (all stainless construction)
to the type number. Example 27DA23-M20/N1 & 27DA23-M20/N4. 5
4. For open or packed levers, change the second digit of the type number suffix. Examples: 27FA45-M70 for open lever, 27GA46-M40 for packed lever.
5. For socket weld or welding nipple connections, change the first digit of the type number suffix to “S” for socket weld or “W” for welding nipple inlet and outlet. Examples: 27DC33-S20
for socket weld, 27DA33-W20 for welding nipple. Maximum set pressures are identical to the MNPT inlet up to 500°F. For Temperatures above 500°F, consult the factory.
6. Female threaded inlet available. Change first digit of the type number suffix to “F”. Example: 27EA34-F20. Maximum set pressure for female inlet is identical to male inlet except
for 1/2 x 1" C orifice which may be set to max set pressure of 2500 psig.
7. For set pressures below 15 psig, consult the Farris factory.
8. Maximum set pressure for steam service valves is 2900 psig or the lower limit as shown in the appropriate selection table.
 Selection Tables – Balanced Design (see notes on page 5)
Threaded Connections – MNPT x FNPT, U.S. Customary Units
Orifice Area Valve Size Maximum Set Pressure, psig Max. Back Pressure Materials
Type Number
Sq. In. Inlet x Outlet -20°F to 450°F psig at 100°F Body / Bonnet Spring
1/2 x 1 27CC13B-M20
316 St. St./ Stainless
0.068 3/4 x 1 27CC23B-M20 1480 400
Carb. St. Steel
1x1 27CC33B-M20
1/2 x 1 27DC13B-M20
316 St. St./ Stainless
0.125 3/4 x 1 27DC23B-M20 1480 400
Carb St. Steel
1x1 27DC33B-M20

Flanged Connections, U.S. Customary Units

ASME Flange Class Maximum Set Pressure, psig Max. Back Materials
Orifice Area Valve Size
Type Number -20°F to Pressure Body /
Sq. In. Inlet x Outlet Inlet RF Outlet RF 400°F Spring
100°F psig at 100°F Bonnet
150# 150# 27CC13B-120 285 200 285
300# 150# 27CC13B-220 740 635 285 316 St. St./ Stainless
1/2 x 1
600# 150# 27CC13B-320 1480 1265 285 Carb. St. Steel
900# 300# 27CC13B-420 1480 1265 400
150# 150# 27CC23B-120 285 200 285
300# 150# 27CC23B-220 740 635 285 316 St. St./ Stainless
0.068 3/4 x 1
600# 150# 27CC23B-320 1480 1265 285 Carb St. Steel
900# 300# 27CC23B-420 1480 1265 400
150# 150# 27CC33B-120 285 200 285
300# 150# 27CC33B-220 740 635 285 316 St. St./ Stainless
1x1
600# 150# 27CC33B-320 1480 1265 285 Carb. St. Steel
900# 300# 27CC33B-420 1480 1265 400
150# 150# 27DC13B-120 285 200 285
316 St. St./ Stainless
1/2 x 1 300# 150# 27DC13B-220 740 635 285
Carb. St. Steel
600# 150# 27DC13B-320 1480 1265 285
150# 150# 27DC23B-120 285 200 285
316 St. St./ Stainless
0.125 3/4 x 1 300# 150# 27DC23B-220 740 635 285
Carb. St. Steel
600# 150# 27DC23B-320 1480 1265 285
150# 150# 27DC33B-120 285 200 285
316 St. St./ Stainless
1x1 300# 150# 27DC33B-220 740 635 285
Carb. St. Steel
600# 150# 27DC33B-320 1480 1265 285

6
Special Materials
Corrosive & Low Temperature Service
316 St. St. Monel Hastelloy C
N1 (NACE) S4 & N4 (NACE) M1 M2 M4 H1 H2 H4
Part Name
-325°F to -325°F to
-50°F to 750°F -450°F to 750°F 2
-50°F to 600°F -50°F to 500°F
600°F 500°F
Body Monel Monel Monel Hastelloy C Hastelloy C Hastelloy C
SA-351 Gr.
Bonnet Monel Hastelloy C
CF8M St. St.
Disc Monel Monel Monel Hastelloy C Hastelloy C Hastelloy C
Guide Monel Monel Hastelloy C Hastelloy C
Disc Holder Monel Monel Hastelloy C Hastelloy C
Stem Monel Hastelloy C
Spring Adj. Screw Monel Hastelloy C
Jam Nut Monel Hastelloy C
Cap, Plain Screwed 316 St. St. Monel Hastelloy C
Cap Gasket Monel Hastelloy C
Body Gasket Monel Monel Hastelloy C Hastelloy C
Guide Gasket Monel Monel Hastelloy C Hastelloy C
Inconel® 316 St. St./ Inconel Inconel Inconel
Spring6 Hastelloy C
X-750 Inconel X-750 X-750 X-750 X-750
Spring Buttons Monel Hastelloy C
O-Ring Retainer5 316 St. St. Monel Monel Monel Hastelloy C Hastelloy C Hastelloy C
Retainer Lock Screw5 316 St. St. Monel Monel Monel Hastelloy C Hastelloy C Hastelloy C
O-Ring Seat Seal5
Guide Seal5
Disc Holder Seal5
Wire Seal
Nameplate (Not Shown)
Welding Nipple (Inlet) Monel Monel Monel Hastelloy C Hastelloy C Hastelloy C
Welding Nipple (Outlet) 316 St. St. Monel Hastelloy C
Lap Joint Stub End (Inlet) Monel Monel Monel Hastelloy C Hastelloy C Hastelloy C
Lap Joint Stub End (Outlet) 316 St. St. Monel Hastelloy C
Lap Joint Flange (Inlet)4 316 St. St. Monel Hastelloy C
Lap Joint Flange (Outlet)4 316 St. St. Monel Hastelloy C

General Notes:
1. Any part where material field is blank is standard material. 7
2. For S4 trim, a 17-4 Ph. or 17-7 Ph. spring may be necessary for some pressures and temperatures.
3. For open and packed lever materials, see page 14.
4. Maximum set pressures for S4, M4, and H4 and Duplex trim are the same as the carbon steel valves or the 316 St. St., Monel and Hastelloy C flange limits respectively, whichever
is lower.
5. Temperature for balanced or O-ring seat design is limited by the elastomer selected. Consult chart on page 4.
6. Balanced design uses the same spring selection as the standard design. Where NACE compliant trim is specified, all trim classes for both conventional and balanced designs use
springs made from Inconel X-750.
Inconel and Inconel X-750 are registered trademarks of Inco Alloys International. We reserve the right to substitute comparable material from other suppliers.
 Capacity Tables – 2700 Series
U.S. Customary Units: ASME Pressure Vessel Code, Section VIII (UV) Stamp

AIR – 10% Overpressure Capacities in Standard STEAM – 10% Overpressure Capacities in Pounds
Cubic Feet Per Minute at 60°F Per Hour at Saturation Temperature
Orifice Area, Sq. In. Orifice Area, Sq. In.
Set Pressure Set Pressure
C D E F G C D E F G
(psig) (psig)
0.068 0.125 0.223 0.350 0.573 0.068 0.125 0.223 0.350 0.573
15 35 65 117 184 301 15 100 184 329 517 847
20 41 75 135 212 347 20 115 213 380 596 976
30 52 95 171 268 439 30 146 269 480 754 1235
40 64 118 210 330 541 40 180 331 591 928 1520
50 76 140 250 392 642 50 214 393 702 1103 1805
60 88 162 289 454 744 60 248 456 813 1277 2090
70 100 184 329 516 845 70 281 518 924 1451 2375
80 112 206 368 578 947 80 315 580 1035 1625 2660
90 124 228 408 640 1048 90 349 642 1146 1799 2945
100 136 250 447 702 1150 100 383 704 1257 1973 3230
150 196 361 644 1012 1657 150 552 1015 1811 2843 4655
200 256 472 842 1322 2164 200 721 1326 2366 3714 6080
250 317 582 1039 1631 2671 250 890 1637 2921 4584 7505
300 377 693 1237 1941 3178 300 1059 1948 3475 5455 8930
350 437 804 1434 2251 3686 350 1228 2259 4030 6325 10355
400 497 914 1631 2561 4193 400 1398 2570 4584 7196 11780
450 557 1025 1829 2871 4700 450 1567 2880 5139 8066 13205
500 618 1136 2026 3181 5207 500 1736 3191 5694 8936 14631
550 678 1246 2224 3490 5715 550 1905 3502 6248 9807 16056
600 738 1357 2421 3800 6222 600 2074 3813 6803 10677 17481
650 798 1468 2618 4110 6729 650 2243 4124 7357 11548 18906
700 858 1578 2816 4420 7236 700 2412 4435 7912 12418 20331
750 918 1689 3013 4730 7743 750 2581 4746 8467 13289 21756
800 979 1799 3211 5039 8251 800 2750 5056 9021 14159 23181
850 1039 1910 3408 5349 8758 850 2920 5367 9576 15029 24606
900 1099 2021 3605 5659 9265 900 3089 5678 10130 15900 26031
950 1159 2131 3803 5969 9772 950 3258 5989 10685 16770 27456
1000 1219 2242 4000 6279 10280 1000 3427 6300 11239 17641 28881
1050 1280 2353 4198 6589 1050 3596 6611 11794 18511
1100 1340 2463 4395 6898 1100 3765 6922 12349 19382
1150 1400 2574 4592 7208 1150 3934 7233 12903 20252
1200 1460 2685 4790 7518 1200 4103 7543 13458 21122
1250 1520 2795 4987 7828 1250 4272 7854 14012 21993
1300 1581 2906 5185 8138 1300 4442 8165 14567 22863
1350 1641 3017 5382 8447 1350 4611 8476 15122 23734
1400 1701 3127 5579 8757 1400 4780 8787 15676 24604
1450 1761 3238 5777 9067 1450 4959 9116 16263 25525
1500 1821 3349 5974 9377 1500 5144 9456 16869 26477
1550 1882 3459 6172 9687 1550 5329 9797 17479 27433
1600 1942 3570 6369 9997 1600 5516 10141 18091 28395
1650 2002 3681 6566 1650 5710 10496 18726
1700 2062 3791 6764 1700 5905 10854 19365
1750 2122 3902 6961 1750 6101 11215 20008
1800 2183 4012 7159 1800 6292 11567 20636
1850 2243 4123 7356 1850 6497 11944 21308
1900 2303 4234 7553 1900 6697 12312 21965
2000 2423 4455 7948 2000 7109 13068 23314
2100 2544 4676 8343 2100 7533 13849 24706
2200 2664 4898 8738 2200 7980 14669 26170
2300 2785 5119 9133 2300 8434 15504 27660
2400 2905 5340 9527 2400 8913 16385 29231
2500 3025 5562 9922 2500 9410 17298 30860
2600 3146 5783 2600 9935 18262
2700 3266 6004 2700 10498 19299
2800 3386 6226 2800 11095 20395
2900 3507 6447 2900 11745 21591
8 3000 3627 6668
3500 4229 7775
4000 4831 8881 General Notes:
4500 5433 9988 1. Capacities at 30 psig and below are based on 3 psi overpressure.
5000 6035 11094 2. For sizing purposes, the coefficients of discharge K are 0.878 for air, gas & steam;
5500 6637 0.676 for water.
6000 7239
6500 7841
Capacity Tables – 2700 Series
U.S. Customary Units: ASME Pressure Vessel Code, Section VIII (UV) Stamp

WATER – 10% Overpressure Capacities3 in

U.S. Gallons Per Minute at 70°F
Orifice Area, Sq. In.
Set Pressure C D E F G
(psig)
0.068 0.125 0.223 0.350 0.573
15 7.4 13.6 24.3 38.1 62.4
20 8.3 15.3 27.4 43.1 70.5
30 10.0 18.4 32.9 51.6 84.5
40 11.5 21.2 37.9 59.6 97.6
50 12.9 23.8 42.4 66.6 109
60 14.1 26.0 46.5 73.0 119
70 15.3 28.1 50.2 78.8 129
80 16.3 30.1 53.7 84.3 138
90 17.3 31.9 56.9 89.4 146
100 18.3 33.6 60.0 94.2 154
150 22.4 41.2 73.5 115 189
200 25.9 47.6 84.9 133 218
250 28.9 53.2 94.9 149 244
300 31.7 58.3 104 163 267
350 34.2 63.0 112 176 288
400 36.6 67.3 120 188 308
450 38.8 71.4 127 200 327
500 40.9 75.3 134 210 345
550 42.9 78.9 140 221 362
600 44.8 82.4 147 230 378
650 46.7 85.8 153 240 393
700 48.4 89.0 158 249 408
750 50.1 92.2 164 258 422
800 51.8 95.2 169 266 436
850 53.4 98.1 175 274 450
900 54.9 101 180 282 463
950 56.4 103 185 290 475
1000 57.9 106 189 298 488
1050 59.3 109 194 305
1100 60.7 111 199 312
1150 62.1 114 203 319
1200 63.4 116 208 326
1250 64.7 119 212 333
1300 66.0 121 216 339
1350 67.3 123 220 346
1400 68.5 126 224 352
1450 69.7 128 228 359
1500 70.9 130 232 365
1550 72.1 132 236 371
1600 73.2 134 240 377
1650 74.4 136 244
1700 75.5 138 247
1750 76.6 140 251
1800 77.7 142 254
1850 78.7 144 258
1900 79.8 146 261
2000 81.9 150 268
2100 83.9 154 275
2200 85.9 157 281
2300 87.8 161 288
2400 89.7 164 294
2500 91.5 168 300
2600 93.4 171
2700 95.1 174
2800 96.9 178
2900 98.6 181
3000 100 184
9
3500 108 199
4000 115 212 General Notes:
4500 122 225 1. Capacities at 30 psig and below are based on 3 psi overpressure.
5000 129 238 2. For sizing purposes, the coefficients of discharge K are 0.878 for air, gas & steam;
5500 135 0.676 for water.
6000 141 3. To determine capacity at 25% overpressure, multiply the capacity at 10% by 1.066.
6500 147
 Selection Tables – Conventional Design
Threaded Connections – MNPT x FNPT, Metric Units
Orifice Area Valve Size Maximum Set Pressure, barg Max. Back Pressure Materials
Type Number
mm2 Inlet x Outlet -28.9°C to 399°C barg at 37.8°C Body / Bonnet Spring
1/2 x 1 27CA13-M20 110
3/4 x 1 27CA23-M20 172
316 St. St./ Stainless
43.87 3/4 x 1 27CA23H-M20 345 28
Carb. St. Steel
1x1 27CA33-M20 172
1x1 27CA33H-M20 448
1/2 x 1 27DA13-M20 110
3/4 x 1 27DA23-M20 110
316 St. St./ Stainless
80.65 3/4 x 1 27DA23H-M20 345 28
Carb. St. Steel
1x1 27DA33-M20 110
1x1 27DA33H-M20 345
316 St. St./ Stainless
143.87 1 x 1-1/2 27EA34-M20 172 28
Carb. St. Steel
316 St. St./ Stainless
225.81 1-1/2 x 2 27FA45-M20 110 28
Carb. St. Steel
316 St. St./ Stainless
369.68 1-1/2 x 2-1/2 27GA46-M20 69 28
Carb. St. Steel

General Notes:
1. Available with optional elastomer or Teflon seat design as illustrated. Change the fourth digit of the type number from “A” to “C” for soft seat, “A” to “T” for Teflon.
Examples: 27DC23-M20 for soft seat, 27DT23-M20 for Teflon. For O-ring pressure and temperature limits, see selection table on page 4.
2. Above type numbers indicate the standard materials of construction. To select corrosive or low temperature materials, add type number suffix as indicated on pages 1 and 7.
3. Available in materials suitable for sour gas (H2S) service to NACE Standards MR0103 and MR0175 / ISO 15156. Add “N1” (standard materials) or “N4” (all stainless construction)
10 to the type number. Example 27DA23-M20/N1 & 27DA23-M20/N4.
4. For open or packed levers, change the second digit of the type number suffix. Examples: 27FA45-M70 for open lever, 27GA46-M40 for packed lever.
5. For socket weld or welding nipple connections, change the first digit of the type number suffix to “S” for socket weld or “W” for welding nipple inlet and outlet.
Examples: 27DA33-S20 for socket weld, 27DA33-W20 for welding nipple.
6. Female threaded inlet available. Change first digit of the type number suffix to “F”. Example: 27EA34-F20. Maximum set pressure for female inlet is identical to male inlet except
for 1/2 x 1" C orifice which may be set to 172 barg max set pressure.
7. For set pressures below 1 barg (15 psig), consult the Farris factory.
8. Maximum set pressure for steam service valves is 200 barg or the lower limit as shown in the appropriate selection table.
Selection Tables – Conventional Design
Flanged Connections, Metric Units
Orifice ASME Flange Class Maximum Set Pressure, barg Max. Back Materials
Valve Size
Area Type Number -28.9°C to Pressure
Inlet x Outlet Inlet RF Outlet RF 204°C 399°C Body / Bonnet Spring
mm2 37.8°C barg at 37.8°C
150# 150# 27CA13-120 20 14 6 20
300# 150# 27CA13-220 51 44 35 20
600# 150# 27CA13-320 102 87 69 20 316 St. St./ Stainless
1/2 x 1
900# 300# 27CA13-420 153 131 104 28 Carb. St. Steel
1500# 300# 27CA13H-520 255 218 174 28
2500# 300# 27CA13H-620 345 345 290 28
150# 150# 27CA23-120 20 14 6 20
300# 150# 27CA23-220 51 44 35 20
600# 150# 27CA23-320 102 87 69 20 316 St. St./ Stainless
43.87 3/4 x 1
900# 300# 27CA23-420 153 131 104 28 Carb. St. Steel
1500# 300# 27CA23H-520 255 218 174 28
2500# 300# 27CA23H-620 345 345 290 28
150# 150# 27CA33-120 20 14 6 20
300# 150# 27CA33-220 51 44 35 20
600# 150# 27CA33-320 102 87 69 20 316 St. St./ Stainless
1x1
900# 300# 27CA33-420 153 131 104 28 Carb. St. Steel
1500# 300# 27CA33H-520 255 218 174 28
2500# 300# 27CA33H-620 425 364 290 28
150# 150# 27DA13-120 20 14 6 20
300# 150# 27DA13-220 51 44 35 20 316 St. St./ Stainless
1/2 x 1
600# 150# 27DA13-320 102 87 69 20 Carb. St. Steel
900# 300# 27DA13H-420 153 131 104 28
150# 150# 27DA23-120 20 14 6 20
300# 150# 27DA23-220 51 44 35 20
600# 150# 27DA23-320 102 87 69 20 316 St. St./ Stainless
3/4 x 1
900# 300# 27DA23H-420 153 131 104 28 Carb. St. Steel
80.65
1500# 300# 27DA23H-520 255 218 174 28
2500# 300# 27DA23H-620 345 345 290 28
150# 150# 27DA33-120 20 14 6 20
300# 150# 27DA33-220 51 44 35 20
600# 150# 27DA33-320 102 87 69 20 316 St. St./ Stainless
1x1
900# 300# 27DA33H-420 153 131 104 28 Carb. St. Steel
1500# 300# 27DA33H-520 255 218 174 28
2500# 300# 27DA33H-620 345 345 290 28
150# 150# 27EA34-120 20 14 6 20
300# 150# 27EA34-220 51 44 35 20 316 St. St./ Stainless
143.87 1 x 1-1/2
600# 150# 27EA34-320 102 87 69 20 Carb. St. Steel
900# 300# 27EA34-420 153 131 104 28
150# 150# 27FA45-120 20 14 6 20
316 St. St./ Stainless
225.81 1-1/2 x 2 300# 150# 27FA45-220 51 44 35 20
Carb. St. Steel
600# 150# 27FA45-320 102 87 69 20
150# 150# 27GA46-120 20 14 6 20
316 St. St./ Stainless
369.68 1-1/2 x 2-1/2 300# 150# 27GA46-220 51 44 35 20
Carb. St. Steel
600# 150# 27GA46-320 69 69 69 20

11
 Selection Tables – Balanced Design
Threaded Connections – MNPT x FNPT, Metric Units
Orifice Area Valve Size Maximum Set Pressure, barg Max. Back Pressure Materials
Type Number
mm2 Inlet x Outlet -28.9°C to 232°C barg at 37.8°C Body / Bonnet Spring
1/2 x 1 27CC13B-M20
316 St. St./ Stainless
43.87 3/4 x 1 27CC23B-M20 102 28
Carb. St. Steel
1x1 27CC33B-M20
1/2 x 1 27DC13B-M20
316 St. St./ Stainless
80.65 3/4 x 1 27DC23B-M20 102 28
Carb St. Steel
1x1 27DC33B-M20

Flanged Connections, Metric Units

ASME Flange Class Maximum Set Pressure, barg Max. Back Materials
Orifice Area Valve Size
Type Number -28.9°C to Pressure Body /
mm2 Inlet x Outlet Inlet RF Outlet RF 204°C Spring
37.8°C barg at 37.8°C Bonnet
150# 150# 27CC13B-120 20 14 20
300# 150# 27CC13B-220 51 44 20 316 St. St./ Stainless
1/2 x 1
600# 150# 27CC13B-320 102 87 20 Carb. St. Steel
900# 300# 27CC13B-420 102 87 28
150# 150# 27CC23B-120 20 14 20
300# 150# 27CC23B-220 51 44 20 316 St. St./ Stainless
43.87 3/4 x 1
600# 150# 27CC23B-320 102 87 20 Carb. St. Steel
900# 300# 27CC23B-420 102 87 28
150# 150# 27CC33B-120 20 14 20
300# 150# 27CC33B-220 51 44 20 316 St. St./ Stainless
1x1
600# 150# 27CC33B-320 102 87 20 Carb. St. Steel
900# 300# 27CC33B-420 102 87 28
150# 150# 27DC13B-120 20 14 20
316 St. St./ Stainless
1/2 x 1 300# 150# 27DC13B-220 51 44 20
Carb. St. Steel
600# 150# 27DC13B-320 102 87 20
150# 150# 27DC23B-120 20 14 20
316 St. St./ Stainless
80.65 3/4 x 1 300# 150# 27DC23B-220 51 44 20
Carb. St. Steel
600# 150# 27DC23B-320 102 87 20
150# 150# 27DC33B-120 20 14 20
316 St. St./ Stainless
1x1 300# 150# 27DC33B-220 51 44 20
Carb. St. Steel
600# 150# 27DC33B-320 102 87 20

12
Capacity Tables – 2700 Series
Metric Units: ASME Pressure Vessel Code, Section VIII (UV) Stamp

AIR – 10% Overpressure Capacities in Standard WATER – 10% Overpressure Capacities in

Cubic Meters Per Minute at 15.6°C Liters Per Minute at 21°C3
Orifice Area mm2 Orifice Area mm2
Set Pressure Set Pressure
C D E F G C D E F G
(barg) (barg)
43.87 80.65 143.87 225.81 369.68 43.87 80.65 143.87 225.81 369.68
1 0.9 1.8 3.2 5.1 8.4 1 27.6 50.8 90.7 142 233
2 1.4 2.6 4.7 7.4 12.1 2 37.4 68.7 122 192 315
3 1.9 3.5 6.3 9.9 16.3 3 45.7 84.0 150 235 385
4 2.4 4.4 7.9 12.5 20.5 4 52.8 97.0 173 271 445
5 2.9 5.3 9.6 15.0 24.6 5 59.0 108 193 303 497
6 3.4 6.2 11.2 17.6 28.8 6 64.6 118 212 332 545
7 3.9 7.2 12.8 20.1 33.0 7 69.8 128 229 359 588
8 4.4 8.1 14.4 22.7 37.1 8 74.6 137 244 384 629
9 4.9 9.0 16.0 25.2 41.3 9 79.2 145 259 407 667
10 5.4 9.9 17.7 27.7 45.5 10 83.5 153 273 429 703
12 6.3 11.7 20.9 32.8 53.8 12 91.4 168 300 470 770
14 7.3 13.5 24.1 37.9 62.1 14 98.8 181 324 508 832
16 8.3 15.3 27.4 43.0 70.5 16 105 194 346 543 890
18 9.3 17.1 30.6 48.1 78.8 18 112 205 367 576 944
20 10.3 19.0 33.9 53.2 87.1 20 118 217 387 607 995
25 12.8 23.5 42.0 65.9 108 25 132 242 433 679 1112
30 15.2 28.1 50.1 78.7 128 30 144 265 474 744 1218
35 17.7 32.6 58.2 91.4 149 35 156 287 512 804 1316
40 20.2 37.1 66.3 104 170 40 167 307 547 859 1407
45 22.7 41.7 74.4 116 191 45 177 325 580 911 1492
50 25.1 46.2 82.5 129 212 50 186 343 612 961 1573
55 27.6 50.8 90.6 142 233 55 195 360 642 1008 1650
60 30.1 55.3 98.7 155 253 60 204 376 670 1052 1723
65 32.5 59.9 106 167 274 65 212 391 698 1095 1794
70 35.0 64.4 115 180 295 70 220 406 724 1137 1861
75 37.5 69.0 123 193 75 228 420 750 1177
80 40.0 73.5 131 205 80 236 434 774 1215
85 42.4 78.1 139 218 85 243 447 798 1253
90 44.9 82.6 147 231 90 250 460 821 1289
95 47.4 87.1 155 244 95 257 473 844 1324
100 49.9 91.7 163 256 100 264 485 866 1359
105 52.3 96.2 171 269 105 270 497 887 1392
110 54.8 100 179 282 110 276 509 908 1425
115 57.3 105 187 115 283 520 928
120 59.7 109 196 120 289 531 948
125 62.2 114 204 125 295 542 968
130 64.7 119 212 130 301 553 987
135 67.2 123 220 135 306 564 1006
140 69.6 128 228 140 312 574 1024
145 72.1 132 236 145 318 584 1042
150 74.6 137 244 150 323 594 1060
155 77.1 141 252 155 328 604 1078
160 79.5 146 260 160 334 614 1095
165 82.0 150 269 165 339 623 1112
170 84.5 155 277 170 344 632 1129
175 86.9 159 175 349 642
180 89.4 164 180 354 651
185 91.9 169 185 359 660
190 94.4 173 190 364 669
195 96.8 178 195 368 677
200 99.3 182 200 373 686
220 109 200 General Notes: 220 391 720 General Notes:
240 119 218 240 409 752
1. Capacities at 2.0 barg set 1. Capacities at 2.0 barg set
260 129 237 260 425 782
280 138 255
pressure and below are based 280 441
pressure and below are based
812
on 0.2 bar overpressure. on 0.2 bar overpressure.
300 148 273 300 457 840
2. For sizing purposes the 2. For sizing purposes the
320 158 291 320 472 868
340 168 309 coefficients of discharge K 340 486 895 coefficients of discharge K
are 0.878 for air, gas, & steam, are 0.878 for air, gas, & steam,
360 178
0.676 for liquid.
360 501
0.676 for liquid.
13
380 188 380 514
400 198 400 528 3. To determine capacity at 25 %
420 208 420 541 overpressure multiply the
440 218 440 553 capacity at 10 % by 1.066.
448 221 448 558
 Capacity Tables – 2700 Series Cap Constructions
Metric Units: ASME Pressure Vessel Code, Section VIII (UV) Stamp

STEAM – 10% Overpressure Capacities in Cap Constructions

Kilograms Per Hour at Saturation Temperature 316 St. St. Monel Hastelloy C

Constructions
Orifice Area mm2 Item Standard

Cap
Set Pressure Part Name M1 H1
(barg) C D E F G No. Materials S42 & N1 & M4 & H4
0.068 0.125 0.223 0.350 0.573 N4 M2 H2
1 44.9 82.5 147 231 378
2 65.1 119 213 335 548 1 Test Lever Iron
3 87.2 160 286 449 735 2 Cap, O.L. Iron
4 109 201 359 563 922

M70 Open Lever

5 131 242 432 678 1110 Stem Test 316 Hast.
3 St. St. Monel
Washer St. St. C
6 154 283 505 792 1297
7 176 324 578 907 1485 316 Hast.
4 Stem Jam Nut St. St. Monel
8 198 364 651 1021 1672 St. St. C
9 220 405 723 1136 1860 Button Head
10 243 446 796 1250 2047 5 Steel
Rivet
12 287 528 942 1479 2422
6 Set Screw Steel
14 332 610 1088 1708 2797
16 376 692 1234 1938 3172 7 Test Lever Steel
18 421 773 1380 2167 3547 316 Hast.
20 465 855 1526 2396 3922 8 Cap, Packed Steel Monel
St. St. C
25 576 1060 1891 2968 4860 Stem Test 316 Hast.
30 688 1264 2256 3541 5797 9 St. St. Monel
Washer St. St. C
35 799 1469 2621 4114 6735
40 910 1673 2986 4686 7672 316 Hast.
10 Stem Jam Nut St. St. Monel
45 1021 1878 3351 5259 8610 St. St. C
M40 Packed Lever

50 1133 2082 3715 5832 9547 316 Hast.

11 Cam St. St. Monel
55 1244 2287 4080 6404 10485 St. St. C
60 1355 2491 4445 6977 11422 316 Hast.
65 1466 2696 4810 7550 12360 12 Gland St. St. Monel
St. St. C
70 1578 2900 5175 8122 13298
75 1689 3105 5540 8695 14235 316 Hast.
13 Gland Nut St. St. Monel
80 1800 3310 5905 9268 St. St. C
85 1911 3514 6269 9840 14 Packing Ring Graphite
90 2023 3719 6634 10413 Gland Nut Flexible PTFE, PTFE, PTFE, PTFE,
95 2134 3923 6999 10985 15
Gasket Graphite Filled Filled Filled Filled
100 2250 4136 7379 11581
Steel
105 2371 4358 7775 12204 16 Groove Pin
Plt’d
110 2495 4587 8183 12843
115 2620 4817 8594 13489 17 Retaining Ring St. St.
120 2749 5054 9018 14153
125 2880 5294 9446 14825 General Notes:
130 3012 5537 9878 1. Any part where material field is blank is standard material.
135 3145 5782 10315 2. “S4” trim suitable for cryogenic service.
140 3283 6035 10766
145 3425 6297 11233 12
150 3569 6562 11706
155 3715 6830 12185 13
160 3870 7115 12694 15
165 4028 7404 13209
170 4191 7704 13744 14
175 4356 8009
180 4533 8332 10 17
185 4716 8669 9
190 4911 9027
195 5113 9400 8
200 5329 9796 11
16
General Notes:
1. Capacities at 2.0 barg set pressure and below are based 7
on 0.2 bar overpressure.
2. For sizing purposes the coefficients of discharge K are 5
0.878 for air, gas, & steam, 0.676 for liquids.
4
14 3
2
6
1
Dimensions & Weights

A
A A

C
C

B
G (MNPT)2
(MNPT, FNPT, & SW)

B B
(FLANGED) (WELDING NIPPLE)

Threaded Connections (MNPT x FNPT)

Valve Size1 US Customary Units (Inches) Metric Units (millimeters) Approx. Weight
A A
Inlet x Outlet B C B C lb kg
(Max.) All Cap Const. (Max.) All Cap Const.
C and D Orifice
1/2 x 1 11-1/4 1-3/4 3-9/16 282 45 91 8 3.6
3/4 x 1 11-1/4 1-3/4 3-9/16 286 45 91 8 3.6
3/4 x 1 H.P. 13-5/8 2-1/2 3-3/4 346 64 95 14 6.3
1x1 11-1/2 1-3/4 3-3/4 292 45 95 8 3.6
1 x 1 H.P. 13-5/8 2-1/2 3-3/4 346 64 95 14 6.3
E Orifice
1 x 1-1/2 13-5/8 2-1/2 3-1/2 346 64 89 16 7.2
F Orifice
1-1/2 x 2 14-9/16 3 3-7/8 370 76 98 17 7.7
G Orifice
1-1/2 x 2-1/2 14-9/16 3 4-1/8 370 76 105 18 8.1

Socket Weld & FNPT x FNPT Connections

Valve Size1 US Customary Units (Inches) Metric Units (millimeters) Approx. Weight
A A
Inlet x Outlet B C B C lb kg
(Max.) All Cap Const. (Max.) All Cap Const.
C and D Orifice
1/2 x 1 11-7/16 1-3/4 3-11/16 291 45 94 8 3.6
1/2 x 1 H.P 13-5/8 2-1/2 3-3/4 346 64 95 14 6.3
3/4 x 1 11-7/16 1-3/4 3-11/16 291 45 94 8 3.6
3/4 x 1 H.P. 13-5/8 2-1/2 3-3/4 346 64 95 14 6.3
1x1 11-7/16 1-3/4 3-11/16 291 45 94 8 3.6
1 x 1 H.P. 13-5/8 2-1/2 3-3/4 346 64 95 14 6.3
E Orifice
1 x 1-1/2 13-3/8 2-1/2 3-1/2 340 64 89 16 7.2
F Orifice
1-1/2 x 2 14-9/16 3 3-7/8 370 76 98 17 7.7 15
G Orifice
1-1/2 x 2-1/2 14-9/16 3 4-1/8 370 76 105 18 8.1

General Notes:
1. H.P. designates the high pressure version of a given inlet size.
2. Same pipe thread connections also used on socket weld models with corresponding inlet sizes.
3. Tolerance for “B” and “C” dimensions is ±1/8".
 Dimensions & Weights
Flanged Connections
Orifice ANSI Flange Class US Customary Units (Inches) Metric Units (millimeters) Weight
Valve Size
Area A A
Inlet x Outlet Inlet RF Outlet RF B C B C lb kg
Sq. In. (Max.) (Max.)
150# 150#
300# 150#
14 5-3/16 6-1/4 356 132 159 15 6.8
600# 150#
1/2 x 1 900# 300#
1500# 300#
16-1/8 5-15/16 6-1/4 410 151 159 22 9.9
2500# 300#
150# 150#
300# 150#
13-15/16 5-3/16 6-3/16 354 132 157 15 6.8
600# 150#
0.068 900# 300#
3/4 x 1
&
0.125 900# 300#
1500# 300# 16-1/8 5-15/16 6-1/4 410 151 159 22 9.9
2500# 300#
150# 150#
300# 150#
14 7/8 5-3/16 7-1/8 378 132 181 15 6.8
600# 150#
1x1 900# 300#
900# 300#
1500# 300# 17-1/16 5-15/16 7-3/16 433 151 183 22 9.9
2500# 300#
150# 150#
300# 150#
0.223 1 x 1-1/2 16-13/16 5-13/16 6-15/16 427 148 176 26 11.7
600# 150#
900# 300#
150# 150#
0.350 1-1/2 x 2 300# 150# 17-7/8 8-3/16 7-3/16 454 208 183 30 13.6
600# 150#
150# 150#
0.573 1-1/2 x 2-1/2 300# 150# 17-1/8 8-3/16 7-7/16 435 208 189 32 14.5
600# 150#

Welding Nipple Connections

Valve Size1 US Customary Units (Inches) Metric Units (millimeters) Approx. Weight
A G2 A
Inlet x Outlet B C B C lb kg
(Max.) All Cap Const. (MNPT) (Max.) All Cap Const.
C and D Orifice
1/2 x 1 13 3-3/16 5-1/4 1 330 81 133 9 4
1/2 x 1 H.P 15-3/16 3-15/16 5-5/16 1 386 100 135 15 6.8
3/4 x 1 12-15/16 3-3/16 5-3/16 1-1/4 329 81 132 9 4
3/4 x 1 H.P. 15-1/8 3-15/16 5-1/4 1-1/4 384 100 133 15 6.8
1x1 12-7/8 3-3/16 5-1/8 1-1/2 327 81 130 9 4
1 x 1 H.P. 15-1/16 3-15/16 5-3/16 2 383 100 132 15 6.8
E Orifice
1 x 1-1/2 14-13/16 3-13/16 4-15/16 1-1/2 376 97 125 17 7.7
F Orifice
1-1/2 x 2 15-7/8 5-3/16 5-3/16 2 403 132 132 18 8.1
G Orifice
1-1/2 x 2-1/2 15-7/8 5-3/16 5-7/16 2 403 132 128 19 8.6
16
General Notes:
1. H.P. designates the high pressure version of a given inlet size.
2. Same pipe thread connections also used on socket weld models with corresponding inlet sizes.
3. Tolerance for “B” and “C” dimensions is ±1/8”.
4. Valves with lens joint inlets have the same center to face dimension as the standard raised face flange models,
except for “C” & “D” orifice valves with 2500 class inlet. Consult the factory for those dimensions & for valves with lens joint connections.
Farris Engineering Products
Process Pressure Relief Valves Steam Safety Valves
SERIES 2600/2600L SERIES 4200
• ASME NB Certified: Air, Steam & Water • ASME NB Section I & VIII Certified:
• Sizes: 1" x 2" to 20" x 24" Steam & Air
• Pressure Range: 15 psig to 6000 psig • Sizes 1¼" x 1½" to 6" x 8"
• Temperature Range: -450°F to +1500°F • Pressure Range: 15 psig to 1000 psig
• Materials*: Carbon Steel, Stainless Steel, • Temperature Range: -20°F to +1000°F
Monel & Hastelloy C • Materials: Carbon Steel, Stainless Steel,
• Options: Balanced Bellows, O-Ring Seat, Chrome-Moly
Open Bonnet • Options: Test Gag
• CE Approved
• CE Approved

SERIES 3800 Pilot Operated

• ASME NB Certified: Air, Steam & Water SERIES 6400
• Sizes: 1" x 2" to 12" x 16" • ASME NB Section I & VIII Certified:
• Pressure Range: 15 psig to 6170 psig Steam & Air
• Sizes: 1" x 2" to 4" x 6"
• Temperature Range: -450°F to +500°F
• Materials*: Carbon Steel, Stainless Steel, • Pressure Range: 15 psig to 1500 psig

Monel & Hastelloy C • Temperature Range: -20°F to +1000°F

• Actuation: Snap and Modulating Controls • Materials: Carbon Steel, Stainless Steel,
• Options: Field Test Connections, Reverse Chrome-Moly
Flow Preventer, Remote Depressurizing & • Options: Closed Bonnet(6600) & Test Gag
Auxiliary Filters
• CE Approved

SERIES 2700
• ASME NB Certified: Air, Steam & Water
• Sizes: ½" x 1" to 1½" x 2½"
• Pressure Range: 15 psig to 6500 psig
• Temperature Range: -450°F to +750°F
• Materials*: Carbon Steel, Stainless Steel,
Monel & Hastelloy C
• Options: Balanced Design, O-Ring Seats,
Flanged, Socket Weld, Welding Nipple,
& Sanitary Connections
• CE Approved

SERIES 2400
• ASME NB Section VIII Certified: Air
• Sizes 1/2" x 3/4" to 1" x 1"
• Pressure Range: 20 psig to 2000 psig
• Temperature range -450°F to + 450°F
• Adjustable Blowdown: Air, Gas & Vapor
Service 17
• "O" Ring & Plastic Seat Design
• Materials: Carbon Steel, Stainless Steel
and Bronze / Brass
• Options: Packed Lever & Test Gag
*Other materials available upon request. Please consult the factory.
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918)258-
7035 TOTAL
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