Spec Sheet 501-001

Section: 501
Effective: January 2019
Replaces: November 2015

Positive Displacement Pumps

and Oil-Free Gas Compressors
for Liquefied Gas Applications
 Blackmer Liquefied Gas Pumps & Compressors
Durability / High Efficiency / Quiet Operation / Easy Maintenance
Guide to Blackmer Liquefied Gas Equipment
Product Description / Application Page Blackmer offers a full line of liquefied gas pumps and
LGF1 oil-free gas compressors, designed for maximum performance
Motor speed pumps for cylinder filling, low volume motor and reliability. From the smallest cylinder filling operation to
LGF1P fueling and small vaporizers. 4-5
LGB1 • Capacities to 15 U.S. gpm(57 lmp). the largest, most sophisticated bulk plant/rail car unloading
LGB1P
system, you will find Blackmer pumps and compressors
LGRL(F)1.25
LGL(F)1.25 operating throughout the world.
Motor speed pumps for multi-station cylinder filling, motor-
LGL(F)1.5 6-8
LGL156
fueling, low volume transfer and vaporizers. Sliding vane design is ideal for butane,
LGL158 propane, anhydrous ammonia, propellants,
LGLD2
LGLD3
refrigerants and similar liquefied gases
Foot-mounted pumps for bulk plants, terminals, vaporizers,
LGLD4 bobtails and transports. 9 - 12 Blackmer liquefied gas pumps are widely used for cylinder
LGLH2 • Capacities to 350 U.S. gpm (1,325 lpm).
filling, motor fueling, bulk transfer, vaporizers, and on bobtails
LGL3021
and transports.
TLGLF3 Flange-mounted pumps for bobtails and transports.
13 - 14 Utilizing Blackmer’s unique sliding vane design, these positive
TLGLF4 • Capacities to 350 U.S. gpm (1,325 lpm).
displacement pumps offer the best combined characteristics
LB081 of sustained high-level performance, energy efficiency,
LB161/LB162
Oil-free gas compressors for liquid transfer and vapor recovery. trouble-free operation, and low maintenance cost.
LB361/ LB362 15 - 18
• Capacities to 125 cfm (212 m3/h).
LB601/ LB602 Pump models are available in 1 to 4-inch port sizes.
LB942/LB943
All models have ductile iron construction for thermal shock
BV0.75
BV1 resistance, low friction ball bearings for high efficiency and
Bypass valves for in-line system protection.
BV1.25 • Capacities to 250 U.S. gpm (946 lpm). 19 quiet operation, and threaded lockcollars that prevent end
BV1.5 thrust wear.
BV2

Replaceable casing liner and end discs Ductile iron construction

Blackmer LGL models can be economically All pressure parts are of ductile
rebuilt for like-new performance with iron for greater resistance to both
replaceable end discs and liners, specially thermal and mechanical shock.
designed to suppress cavitation and reduce
Internal relief valve
wear.
Protects the pump from excessive
Two-piece threaded lock pressure buildup
collars Precisely in the event of an obstructed
position the rotor and shaft, or closed return line.
allowing the pump to operate
Nonmetallic Duravanes
under high inlet pressures.
Designed to resist wear under
In addition, this positive lock
non-lubricating conditions. These
thrust control helps prevent
chemically inert vanes
premature wear to internal
are formulated of a tough
components.
resin material for long life
External ball bearings and quiet operation.
Low friction grease-lubricated ball bearings
Blackmer mechanical seals
are completely isolated from the pumpage
Specially developed for
by mechanical seals for trouble-free service
non-lubricating liquids, Blackmer’s
and long life.
exclusive component type design
is field proven to provide long
life and reliable service on a wide
High Performance Design Features range of liquefied gas applications.

2
Cavitation Suppression Liners
1.25 through 4-inch models now have special liners that “cushions” FIGURE 2. How Blackmer’s sliding vanes maintain efficiency
the effects of collapsing vapor bubbles within the pump, sharply
reducing the noise, vibration, and wear normally caused by
entrained vapors. See page 6 for additional details.

FIGURE 1. How Blackmer’s sliding vane action works

Self-adjusting vanes keep performance high

The performance of gear pumps will constantly diminish as
wear increases clearances. To compensate for the reduced
performance, you must increase the pump speed (which
further accelerates pump wear) or put up with reduced
How Blackmer sliding vane pumps achieve capacity until performance drops to a totally unacceptable
high efficiency level. The vanes on a Blackmer pump automatically slide out
As shown in Figure 1, Blackmer pumps use a rotor with sliding of their rotor slots to continuously adjust for wear. No more
vanes that draw the liquid in behind each vane, through the inlet speeding up to compensate and no
port and into the pumping chamber. As the rotor turns, the liquid is more putting up with poor performance. Blackmer pumps
transferred between the vanes to the outlet where it is discharged maintain near-original efficiency and capacity throughout the
as the pumping chamber is squeezed down. Each vane provides a life of the vanes.
positive mechanical push to the liquid before it.

Vane contact with the chamber wall is maintained

Vane replacement in
by three forces: (1) centrifugal force from the rotor’s rotation, (2) minutes, easy inspection
push rods moving between opposing pairs of vanes, and (3) liquid Vane replacement is easy. Simply
pressure entering through the vane grooves and acting on the remove the outboard head
rear of the vanes. assembly, slide out the old vanes,
Simple vane replacement requires insert the new ones, and reinstall
Each revolution of a Blackmer pump displaces a constant volume no special tools.
the head. In a matter of minutes,
of fluid. Variance in pressure has minimal effect. Energy-wasting
your pump is back in operation. Routine inspection is
turbulence and slippage are minimized and high volumetric
equally easy. In fact, most maintenance can be done without
efficiency is maintained.
disconnecting the pump from its piping or drive shaft.

Efficiency means energy savings Replaceable liners economically

The high efficiency of Blackmer pumps means they require less
restore efficiency
horsepower than other positive displacement pumps. So you
Blackmer LGL pumps are equipped with replaceable liners
spend less on motors initially and less on electricity to operate the
that protect the pump casing and provide the economy of
pumps after they are installed.
simple replacement, restoring the pump to like-new efficiency.
No special tools are required to remove a worn liner and install
High capacity at lower speeds means
a new one, and the simple operation can be completed in a
reduced wear few minutes without taking the pump off line.
The volumetric efficiency of Blackmer pumps saves more than
energy. Their inherently low slippage allows them to operate UL and ISO 9001
at substantially lower rpms than other positive displacement
All pump and bypass valve
pump types, while still delivering equivalent output. These lower
models described in this bulletin
operating speeds mean quieter operation, longer service life, and
are listed by Underwriters
reduced maintenance requirements.
Laboratories for both LP-gas and
anhydrous ammonia service.
All products in this bulletin are
Easily replaceable liner restores manufactured to ISO 9001
efficiency.
quality standards.

3
 LGF1 & LGB1 Pumps Motor Speed Pumps for Cylinder Filling
These 1-inch motor speed pumps have long been popular for
cylinder filling, small volume motor fueling and supplying small
vaporizers. They offer the same heavy-duty construction of larger
Blackmer models and are available in two mounting styles and
capacity ranges. The LGF1 model is fitted with an integral bracket
and coupling for direct flange mounting to a NEMA C-face motor.
LG1/LG1P cutaway This bracket also allows the pump body to be rotated to simplify
hookup to piping systems. The LGB1 model is equipped with a
coupling and bracket for mounting to a conventional base. The
LGF1 and LGB1 models will handle up to 10 U.S. gpm (38 L/min).
The LGF1P and LGB1P models offer 50% greater capacity
and will handle up to 15 U.S. gpm (57 L/min).

All models have 1-inch NPT tapped ports and use an exclusive
“combination” valve that acts as both a back-to-tank bypass valve
and as an internal relief valve. This feature lowers installation costs
by eliminating the need for a separate bypass valve. It also assures
pressure relief if the back-to-tank bypass line is closed. The valve’s
unique three-stage operation is shown in Figure 3.
LGF1/LGF1P
Standard construction materials for these models include Buna-N
mechanical seals and Duravanes for handling both LP gas and
anhydrous ammonia. Maximum differential pressure is 125 psi
(8.62 Bar) for both models.

Assembled Pump Units

LGF Drive Style
LGB1/LGB1P Flange Mounting -
Direct Motor Drive
LGF1 and LGF1P models are
supplied with an integral
bracket and flexible shaft
FIGURE 3. Combination relief/bypass valve
coupling, ready to accept
a NEMA C-face or IEC
flanged-face motors. All
Normal Operation
LGF units are available with
Valve is completely closed
or without electric motors.
during normal operation with
discharge line open.
DM Drive Style
Bracket Mounting -
Direct Motor Drive
Back-to-Tank Bypassing
LGB1-DM or LGB1P-DM
Discharge pressure exceeding
base-mounted units
the valve setting opens valve
are available, complete
to second stage, returning all
with pump, bracket,
or part of pump flow back to
coupling and coupling
supply tank.
guard, mounted on a
common base, ready
to accept a standard
Pressure Relief
NEMA motor. All DM
If back-to-tank line is closed,
units are available with
valve opens to third stage,
or without electric
passing flow back to inlet side
motors.
of pump.

4
Selection Data
When selecting a standard pump or assembled unit from the intake line. Pumps used on vaporizers should be mounted with
table below, check the pump’s delivery and brake horsepower inlet up, and sized for a capacity of at least 150% of the normal
requirements in the performance curves. These pumps are rated peak load to prevent system failure due to sudden pressure drop
for continuous duty, although such applications may accelerate on start-up. Additional system requirements can be achieved by
pump wear rates, particularly if vaporization occurs in the pump series of parallel staging.

Approximate Delivery of Propane Maximum Maximum Normal Time Motor Size

Assembled Pump Units Standard
at Differential Pressures Differential Working To Fill LP Gas Cylinders For Mounting on
Motor2
Pump and Pump Speeds Shown1 Pressure Pressure3 in Minutes Standard Base2
and
Motor
Speed 50 PSI 100 PSI
Factory rpm (3.45 Bar) (6.89 Bar) 20 lb. 100 lb.
Minimum Maximum
Model Relief Valve psi Bar psi Bar (9 kg) (45 kg) hp
Frame Size Frame Size
Setting Cylinder Cylinder
gpm L/min gpm L/min

105 psi
LGF1 1,750 8.0 30.3 6.0 22.7 125 8.62 350 24.13 3
⁄4 3 1 56C 184C4
(7.24 bar)

105 psi 3
LGB1-DM 1,750 8.0 30.3 6.0 22.7 125 8.62 350 24.13 ⁄4 3 1 56 184
(7.24 Bar)

120 psi
LGF1P 1,750 13.0 49.2 10.0 37.9 125 8.62 350 24.13 1
⁄2 2 11⁄ 2 56C 184C4
(8.27 Bar)

120 psi 1
LGB1P-DM 1,750 13.0 49.2 10.0 37.9 125 8.62 350 24.13 ⁄2 2 11⁄ 2 56 184
(8.27 Bar)
1 Check the pump’s delivery and brake horsepower requirements in the performance curves below. See footnote with the curves which explains the factors that can cause delivery to vary.
2 Motors may be specified from Electric Motor Price List No. 10-MTRG-01 (explosion-proof manual start switch for 1 & 1-1/2 horsepower single-phase motors also available).
3 Maximum rated working pressure is 350 psi (24.13 Bar) for LPG and NH3 (limited by U.L. and N.F.P.A. 58).
4 Motor adaptors are available for NEMA C-face or IEC flanged-face motors. Pump flange will not accept 182TC/184TC frames.

Performance Curves LGF1/LGB1

LGF1/LGB1
LGF1P/LGB1P
LGF1P/LGB1P
60 60 RPMRPM
U.S. GAL / MIN.

60 60 RPMRPM 15 15
U.S. GAL / MIN.

U.S. GAL / MIN.

15 15
LITERS / MIN.

These curves are based on approximate

U.S. GAL / MIN.
LITERS / MIN.

LITERS / MIN.
LITERS / MIN.

40 40 10 10 40 40 10 10
delivery rates when handling propane 17501750
20 20 5 5 20 20 5 5 14501450
or anhydrous ammonia at 80°F (26.7°C). 17501750
14501450 0 0 0 0
0 0 0 0
Line restrictions such as excess flow 2.0 2.0 2.0 2.0
valves, elbows, etc. will adversely affect
deliveries. For propane at 32°F (0°C), actual 17501750
1.5 1.5 1.5 1.5
BRAKE HP REQUIRED

14501450
BRAKE HP REQUIRED

BRAKE HP REQUIRED

delivery will be further reduced to about

BRAKE HP REQUIRED

80% of nominal. Delivery of butane at

1.0 1.0 17501750 1.0 1.0
80°F (26.7°C) will be 60% to 70% of these
values, and may run as low as 35% to 45% 14501450
at 32°F (0°C). This loss of delivery is not .5 .5 .5 .5

a pump characteristic but is caused by

natural thermodynamic phenomena of 0 00 0 00
0 20 20 40 40 60 60 80 80100100120120 0 20 20 40 40 60 60 80 80100100120120
DIFFERENTIAL PRESSURE
PSI PSI
liquefied gases. DIFFERENTIAL
DIFFERENTIAL PRESSURE
PRESSURE PSI PSI DIFFERENTIAL PRESSURE

0 0 2 2 4 4 6 6 8 8 0 0 2 2 4 4 6 6 8 8
BARBAR BARBAR

5
 LGL Series Pumps
With Cavitation Suppression Liners
1.25-inch through 4-inch LGL pumps feature noise suppression liners.
This patented technology reduces noise at its source by reducing the
amount of cavitation in the pump. Reducing the cavitation level also
reduces vibration and wear.

The sudden collapse of vapor bubbles inside the pump is known

as cavitation. By allowing a controlled amount of fluid at discharge
pressure to bleed back toward the suction of the pump, the vapor
bubbles are collapsed over a longer period time. The net result is less
noise, less vibration and less wear.

As shown in the chart, the reduction in noise level can be quite dramatic.
Similar noise reductions have been measured in all the LGL pump sizes.

Patent number: 6,030,191

LGRL1.25, LGL1.25 & LGL1.5 Pumps

Motor Speed Pumps for Motor Fueling and Multi-Cylinder Filling
These durable motor speed pumps offer capacities from 9 to 35 U.S. gpm (34-132
L/min), and are ideal for motor fueling, multiple-station cylinder filling and a variety
of small transfer jobs. The LGL models are designed for foot mounting to a common
base-plate. The LGLF models are fitted with an integral bracket and coupling for direct
flange mounting to a NEMA C-face motor. This bracket also allows the pump body to
be rotated to simplify hookup to piping systems.
Available with 1.25 or 1.5-inch NPT tapped ports, all models are equipped with an
internal relief valve, and a replaceable casing liner and end discs for easy rebuilding of
the pumping chamber if ever necessary. The LGRLF 1.25-inch model features a special
liner, which offers lower flow rates than the LGL 1.25-inch pump. In addition, these
pumps feature cavitation suppression liners to reduce noise, vibration and wear.

Standard construction materials for these models include Buna-N mechanical

seals and Duravanes for handling both LP gas and anhydrous ammonia. Maximum
differential pressure is 150 psi (10.34 Bar) for all models.
LGL1.25/LGL1.5
Assembled Pump Units

LGL1.25/LGL1.5

LGF Drive Style DM Drive Style

LGRLF1.25/LGLF1.25 Flange Mounting - Direct Motor Drive Foot Mounting - Direct Motor Drive
Standard LGRLF1.25, LGLF1.25, and LGL1.25-DM and LGL1.5-DM base-
LGLF1.5 models are supplied with an mounted units are available, complete
integral bracket and a flexible shaft with pump, coupling and coupling guard,
coupling, ready to accept a NEMA C-face mounted on a common base, ready
or IEC flanged-face motors. All LGF units to accept a standard NEMA motor. All
are available with or without electric DM units are available with or without
motors. electric motors.

6
 Performance Curves

LGRLF1.25
LGRLF1.25
LGRLF1.25 LGLF1.25LGLF1.25
/ LGL1.25
LGLF1.25
/ LGL1.25
/ LGL1.25 LGL1.5 LGL1.5 LGL1.5
120 RPM RPM120 RPM RPM140 RPM
U.S. GAL / MIN.

U.S. GAL / MIN.

U.S. GAL / MIN.

12030 12030 RPM 12030 12030 RPM 14035 14035 RPM RPM
U.S. GAL / MIN.

U.S. GAL / MIN.

U.S. GAL / MIN.

U.S. GAL / MIN.

U.S. GAL / MIN.

U.S. GAL / MIN.

LITERS / MIN.

LITERS / MIN.

LITERS / MIN.
30 30 35
LITERS / MIN.

LITERS / MIN.

LITERS / MIN.

LITERS / MIN.

LITERS / MIN.

LITERS / MIN.
80 8020 8020 80 8020 8020 100 10025 10025 1750
20 20 1750 25 1750 1750
1750 1750 1750 40 1750 1750 1450
1450 1450 1450
40 4010 4010 10 1450 1450 1450 4010 4010 10 1150 1450 1450 60 6015 6015 15 1150
1150 1150 1150 1150
0 0 0 0 20 5
0 00 0 0 00 0 20 20 5 5
5 5 5 5 5 5 5 5 5 1750 1750 1750

4 4 4 4 4 4 4 4 4 1450 1450 1450

BRAKE HP REQUIRED

BRAKE HP REQUIRED

BRAKE HP REQUIRED
1750
BRAKE HP REQUIRED

BRAKE HP REQUIRED

BRAKE HP REQUIRED

BRAKE HP REQUIRED

BRAKE HP REQUIRED

BRAKE HP REQUIRED
1750 1750 1150
3 3 3 1150 1150
3 3 1750 3 3 1450 1450 1450 3 3
1750 1750
1450 1450 1450 1150 1150 1150
2 2 2 2 2 2 2 2 2

1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 0 0 0
0 20
0 40
200 604020 80
6040 100
8060 12080 140
100 120
100 140
120 140 0 20
0 40
200 604020 80
6040 100
8060 12080 140
100 120
100 140
120 140 0 20
0 40
200 604020 80
6040 100
8060 12080 140
100 120
100 140
120 140
DIFFERENTIAL PRESSURE
DIFFERENTIAL PSI PRESSURE
DIFFERENTIAL
PRESSURE PSI PSI DIFFERENTIAL PRESSURE
DIFFERENTIAL PSI PRESSURE
DIFFERENTIAL
PRESSURE PSI PSI DIFFERENTIAL PRESSURE
DIFFERENTIAL PSI PRESSURE
DIFFERENTIAL
PRESSURE PSI PSI
0 02 024 246 468 6 8 10 8 10 10 0 02 024 246 468 6 8 10 8 10 10 0 02 024 246 468 6 8 10 8 10 10
BAR BAR BAR BAR BAR BAR BAR BAR BAR

These curves are based on approximate delivery rates when handling propane or anhydrous ammonia at 80°F (26.7°C). Line restrictions such as excess flow valves, elbows, etc. will adversely affect deliveries. For propane at 32°F (0°C), actual delivery will be further reduced to
about 80% of nominal. Delivery of butane at 80°F (26.7°C) will be 60% to 70% of these values and may run as low as 35% to 45% at 32°F (0°C). This loss of delivery is not a pump characteristic but is caused by natural thermodynamic phenomena of liquefied gases.

Selection Data
When selecting a standard pump or assembled unit from the table below, check the pump’s delivery and brake horsepower
requirements in the performance curves. These pumps are rated for continuous duty, although such applications may accelerate pump
wear rates, particularly if vaporization occurs in the pump intake line. Pumps used on vaporizers should be mounted with inlet up,
and sized for a capacity of at least 150% of the normal peak load to prevent system failure due to sudden pressure drop on startup.
Additional system requirements can be achieved by series or parallel staging.

Approximate Delivery of Propane at Differential Maximum Maximum Motor Size For Mounting
Assembled Pump Units
Pump Pressures and Pump Speeds Shown1 Differential Pressure Working Pressure2 on Standard Base3
and
Motor 50 psi 100 psi
Factory Speed (3.45 Bar) (6.89 Bar) Minimum Maximum
Model Relief Valve rpm psi Bar psi Bar
Frame Size Frame Size
Settings
gpm L/min gpm L/min

150 psi
LGRLF1.25 1,750 16.0 60.6 14.0 53.0 150 10.34 350 24.13 56C 215C4
(10.34 Bar)

150 psi 1,750 21.0 79.5 18.0 68.1 150 10.34 350 24.13 56C 215C4
LGLF1.25
(10.34 Bar) 1,150 13.0 49.2 10.0 37.9 150 10.34 350 24.13 56C 215C4

150 psi 1,750 33.0 124.9 29.0 109.8 150 10.34 350 24.13 56C 215C
LGLF1.5
(10.34 Bar) 1,150 20.0 75.7 17.0 64.4 150 10.34 350 24.13 56C 215C

150 psi 1,750 21.0 79.5 18.0 68.1 150 10.34 350 24.13 56 215T
LGL1.25-DM
(10.34 Bar) 1,150 13.0 49.2 10.0 37.9 150 10.34 350 24.13 56 215T

150 psi 1,750 33.0 124.9 29.0 109.8 150 10.34 350 24.13 56 215T
LGL1.5-DM
(10.34 Bar) 1,150 20.0 75.7 17.0 64.4 150 10.34 350 24.13 56 215T

1 Check the pump’s delivery and brake horsepower requirements in the performance curves. See footnote with the curves which explains the factors that can cause delivery to vary.
2 Maximum rated working pressure is 350 psi (24.13 Bar) for LPG and NH3 (limited by U.L. and N.F.P.A. 58).
3 Motors may be specified from Electric Motor Price List No. 10-MTRG-01 (explosion-proof manual start switch for 1 & 1-1/2 horsepower single-phase motors also available).
4 Motor adaptors are available for NEMA C-face or IEC flanged-face motors. Pump flange will not accept 213TC/215TC frames.

Note: Refer to back cover for external bypass valve information.

7
 LGL150 Series Motor Speed
High Differential Pressure Pumps
Designed for the toughest LPG applications:

Applications Features
• Single and dual hose fuel dispensers • D
 esigned for high differential
pressure of 13.7 bar (200 psi)
• Aerosol filling
• Sliding vane, positive displacement
• Vaporizer feed
design for consistent performance
• Underground tank applications
• M
 otor speed operation at 1,450 rpm
• Aboveground tank applications (50Hz) or 1,750 rpm (60Hz) operation

• Other high differential pressure • LGL158 suction lift up to 13 feet

liquefied gas applications (4 meters) – smaller pumps have less
lift capability
• UL listed for use on propane,
butane, butane/propane mixes and • LGL156 model designed to allow use
anhydrous ammonia of single phase motors

• Cavitation suppression liner

LGL 150 Series with 4-bolt flanges • Replaceable liner and discs

• Ductile iron construction

• Flanged inlet and outlet connections

• Factory ISO-9001 certified

See Spec Sheet 501-004 for more information.

LGL 150 Series with ANSI flanges and motor

Pump Specifications
Maximum
Pump Maximum Recommended Maximum Working
GPM (L/min) HP (kW) Differential Relief Valve Setting
Model Speed Bypass Valve Setting Pressure
Pressure
LGL156 1,750 21 (79.5) 4.9 (3.6) 160 PSI (11.0 bar) 160 PSI (11.0 bar) 225 PSI (15.5 bar) 425 PSI (29.3 bar)
LGL158 1,750 32.3 (122) 6.5 (4.8) 200 PSI (13.8 bar) 200 PSI (13.8 bar) 225 PSI (15.5 bar) 425 PSI (29.3 bar)

DM Drive Style
Direct Motor Drive
Base mounted units are available, complete with pump, coupling and coupling guard, mounting on a common base, ready to accept a
standard NEMA C-face or IEC flanged-face motor. DM units are available with and without electric motors.

8
 LGLD2, LGLD3 & LGLD4 Pumps
Multi-Purpose Pumps for Bulk Plants, Terminals and Truck Systems
These rugged pumps are ideal for bulk plant service, multiple cylinder filling applications,
vaporizers, bobtails and transports.

Single- or double-ended drive shaft models are offered in 2-, 3- and 4-inch port sizes with
capacities ranging from 30 to 350 U.S. gpm (114 – 1,325 L/min). The LGLD2 and LGLD3
models have long been popular for bobtail service because of their double-ended
drive shaft arrangement, which allows the pump to be easily positioned for clockwise or
counter-clockwise shaft rotation.

All models have an internal relief valve, and a replaceable casing liner and end discs for
easy rebuilding of the pumping chamber if ever necessary. In addition, these pumps
feature cavitation suppression liners to reduce noise, vibration and wear.

Standard construction materials include Buna-N mechanical seals and Duravanes for
handling both LP-gas and anhydrous ammonia.

Maximum differential pressure for the 2- and 3-inch models is 150 psi (10.34 Bar), and
125 psi (8.62 Bar) for the 4-inch models. Ports are offered with NPT tapped companion
flanges or weld flanges.
LGLD4 cutaway

Truck Mounted Drive

Blackmer LGLD2 pumps are often mounted to the chassis of a bobtail, or to a steel pad
that is welded to the tank.

The 3- and 4-inch models can be mounted to a transport in a number of different ways,
generally near or between the tank landing gear brackets.

Truck mounted pumps are normally driven through a P.T.O. or hydraulic drive system.
Refer to Blackmer’s Liquefied Gas Handbook-Bulletin 500-001 for various types of
bobtail and transport pump systems.

Assembled Pump Units

VB Drive Style HR Drive Style
V-Belt Drive Helical Gear Reduction Drive

Standard base-mounted VB units are available, complete with Standard base-mounted HR units are available, complete with
pump, hubs, sheaves, high-torque V-belts and belt guard, pump, Blackmer Helical Gear Reducer, mounting brackets,
mounted on a common base, ready to accept a standard NEMA couplings and coupling guards, mounted on a common base,
motor. All VB units are available with or without motors. ready to accept a standard NEMA motor. All HR units are available
with or without motors.

9
 Performance Curves
LGLD2 LGLD3 LGLD4
RPM RPM RPM

U.S. GAL / MIN.

U.S. GAL / MIN.

U.S. GAL / MIN.

120 240 400

LITERS / MIN.
980
LITERS / MIN.

LITERS / MIN.
400 800 870 1200 800
80 780 160 300 640
780 800
640 640 200 520
200 40 520 400 80 420
520 400 100
420 420 350
0 0 350 0 0 350 0 0
10 870
640 20 40 800
980 780 780
36
8 32

BRAKE HP REQUIRED
520 16 640
640
BRAKE HP REQUIRED

28

BRAKE HP REQUIRED
6 420 520
24 520
12
350 420 20 420
4 16 350
8 350
12
2 8
4
4
0 0
0 20 40 60 80 100 120 140 0 0 20 40 60 80 100 120
DIFFERENTIAL PRESSURE PSI 0 20 40 60 80 100 120 140 DIFFERENTIAL PRESSURE PSI
DIFFERENTIAL PRESSURE PSI
0 2 4 6 8 10 0 2 4 6 8
BAR 0 2 4 6 8 10 BAR
BAR

These curves are based on approximate delivery rates when handling propane or anhydrous ammonia at 80°F (26.7°C). Line restrictions such as excess flow valves, elbows, etc. will adversely affect deliveries. For propane at 32°F (0°C), actual delivery will be further reduced to
about 80% of nominal. Delivery of butane at 80°F (26.7°C) will be 60% to 70% of these values, and may run as low as 35% to 45% at 32°F (0°C). This loss of delivery is not a pump characteristic but is caused by natural thermodynamic phenomena of liquefied gases.

Selection Data Approximate Delivery Maximum Maximum Motor Size

Assembled Pump Units Pump of Propane at Differential Differential Working Drive Rating (Maximum For Mounting on
When selecting a pump for truck Pressures and Pump Speeds 3
Speed Pressure Pressure2 Horsepower Drive Will Transmit) Standard Base4
Shown1
or transport systems, use the rpm
(Using 50 psi 100 psi
performance curves on this page. For Factory 1,750 rpm (3.45 Bar) (6.89 Bar) 0-3 Hour 3-4 Hour 8-24 Hour Minimum Maximum
Model Relief Valve Motor) psi (Bar) psi (Bar) Frame Frame
a standard pump or assembled unit, Duty Duty Duty Size
Setting gpm L/min gpm L/min Size
use the table shown. The table shows 660 67 254 57 216 9.2 9.2 7.8 184T 213T
brake horsepower limitations for the LGLD2-VB
150 psi 520 50 189 41 155 150 350 6.4 6.4 5.4 182T 184T
(10.34 Bar) 420 40 151 30 114 (10.34 Bar) (24.13 Bar) 4.8 4.8 4.0 182T 184T
unit’s drive and base. Check these limits
330 30 114 23 87 3.1 3.1 2.6 182T 182T
against the pump brake horsepower 640 65 246 55 208 8.9 7.1 5.7 182T 215T
requirements, as shown in the curves. LGLD2-HRA
150 psi 520 50 189 41 155 150 350 7.0 5.6 4.5 182T 215T
(10.34 Bar) 420 40 151 30 114 (10.34 Bar) (24.13 Bar) 5.4 4.3 3.4 182T 215T
For continuous duty applications, it is 350 32 121 24 91 4.1 3.3 2.6 182T 215T
generally advisable to use pump speeds 640 133 503 112 424 12.1 12.1 10.2 215T 254T
of 400 rpm or less. Peak shaving plant 150 psi 520 108 409 84 318 150 350 8.9 8.9 7.5 213T 215T
LGLD3-VB
(10.34 Bar) 420 80 303 60 227 (10.34 Bar) (24.13 Bar) 7.3 7.3 6.1 213T 215T
systems, for example, involve continuous 340 59 223 42 159 5.4 5.4 4.5 184T 184T
pump duty. Moreover, pumps used in 640 133 503 112 424 25.0 25.0 20.0 182T 256T
150 psi 520 108 409 84 318 150 350 24.3 19.4 15.5 182T 256T
peak shaving plant systems should LGLD3-HRA
(10.34 Bar) 420 80 303 60 227 (10.34 Bar) (24.13 Bar) 17.8 14.3 11.4 182T 256T
be sized for a capacity of at least 350 63 238 45 170 14.4 11.5 9.2 182T 256T
150% of the normal peak load to 640 270 1,022 220 833 26.9 26.9 22.8 254T 284T
150 psi 520 220 833 180 681 125 350 19.6 19.6 16.6 254T 256T
prevent system failure due to abnormal LGLD4-VB
(10.34 Bar) 420 170 644 130 492 (8.62 Bar) (24.13 Bar) 15.8 15.8 13.4 215T 256T
vaporization in the intake line. 340 130 492 90 341 11.4 11.4 9.8 213T 215T
640 270 1,022 220 833 30.0 30.0 26.9 182T 286T
150 psi 125 350
LGLD4-HRB 500 210 795 170 644 30.0 30.0 24.0 182T 286T
(10.34 Bar) (8.62 Bar) (24.13 Bar)
400 160 606 120 454 30.0 24.1 19.3 182T 286T
1 Check the pump’s delivery and brake horsepower requirements in the performance curves on opposite page. See footnote with the curves which explains the factors that can
cause delivery to vary.
2 Maximum rated working pressure is 350 psi (24.13 Bar) for LPG and NH3 (limited by U.L. and N.F.P.A. 58).
3 Maximum horsepower that standard drive (V-belt/gearbox and base) will transmit.
4 Motors may be specified from Electric Motor Price List No. 10-MTRG-01

Note: Refer to back cover for external bypass valve information.

Companion Flanges
Pump Model Standard or Intake Discharge
Optional
Standard 2” NPT 2” NPT
LGLD2
Optional 2” Weld 2” Weld
Standard 3” NPT 3” NPT
LGLD3
Optional 3” Weld 3” Weld
Standard 4” Weld 3” Weld
LGLD4
Optional 4” Weld 4” Weld

10
 LGL 3021 Series
Multi-Purpose LPG Pump for Bulk Plants & Terminals

Based on Blackmer’s industry standard LGLD3 transfer pump, the LGL3021 replaces competitive pumps without changing piping
connections or motor drives. Whether filling an LPG bobtail or transport – the LGL3021 can do it faster and more efficiently than
competitive models.
Applications Features
• Bulk plant service • Designed for high differential
pressure of 150 psi (10.34 bar)
• Multiple Cylinder filling
• Sliding vane, positive
• Vaporizers
displacement design for
• Bobtail and transport loading consistent performance
& off-loading
• D
 esigned to bolt in place of
• U.L. listed for use on propane, competitive pumps without
butane, butane/propane mixes changing piping or motor drives
and anhydrous ammonia
• Same performance and internal
parts as LGLD3 pumps
• Cavitation suppression liner

• Replaceable liner and discs

• Ductile iron construction

• Factory ISO-9001 certified

How Blackmer’s sliding vane action works

Pump Specifications
Maximum Differential Recommended Maximum Working
Pump Model Maximum Speed GPM (L/min) HP (kW) Relief Valve Setting
Pressure Bypass Valve Setting Pressure
LGL3021 800 rpm 155 (586)* 14.2 (10.6) 150 psi (10.34 bar) 125 psi (8.6 bar) 150 psi (10.34 bar) 350 psi (24.13 bar)
* Approximate delivery of propane at 800 rpm at 100 psi (6.89 bar) differential pressure.

Available Flanges
Model Size
3" NPT Flange, Nodular
LGL3021
4" NPT Flange, Nodular

11
 LGLH2 High Differential Pressure Pump
Applications Features
• High differential pressure bobtail • Designed for high differential
delivery trucks pressure of 165 psi (11.4 bar)

• High capacity LPG fueling • Sliding vane, positive

displacement design for
• Aerosol filling
cosistent performance
• Vaporizer feed
• Dimensionally interchangeable
• Other high differential pressure with the LGLD2
liquefied gas applications
• Up to 980 rpm operation
• U.L. listed for use on propane,
• Patented cavitation suppression
butane and butane/propane
liner
mixes
• Replaceable liner and discs

• Ductile iron construction

• Flanged inlet and outlet

connections

• Factory ISO-9001 certified

LGLH2 Performance
Performance at 145 psid (10 Bar) differential pressure Maximum Maximum
Relief Valve Setting
780 rpm 640 rpm 520 rpm Differential Pressure Working Pressure
61 gpm / 11.7 hp 47 gpm / 9.2 hp 32.6 gpm / 7.1 hp 165 psi 190 psi 390 psi
231 L/min / 8.7 kw 178 L/min / 6.9 kw 123 L/min / 5.3 kw 11.4 Bar 13.1 Bar 26.wr

VB Drive Style
V-Belt Drive
Standard base-mounted VB units are available, complete with pump, hubs, sheaves, high-torque V-belts and belt guard, mounted
on a common base, ready to accept a standard NEMA motor. All VB units are available with our without motors

HR Drive Style
Helical Gear Reduction Drive
Standard base-mounted HR units are available, complete with pump, Blackmer Helical Gear Reducer, mounting brackets, couplings
and coupling guards, mounted on a common base, ready to accept a standard NEMA motor. All HR units are available with our
without motors.

12
 TLGLF3 & TLGLF4 Pumps
Flange Mounted Pumps for Bobtails and Transports
Blackmer TLGLF3 and TLGLF4 pumps are designed to flange mount
directly to a commercial internal control valve, in combination with the
tank of a bobtail or transport. Direct mounting eliminates the need for
inlet pipes, shut-off valve and external strainer which can restrict flow
and cause vaporization problems. The result is smoother operation
and longer pump life.

Both models are equipped with a double-ended drive shaft for clockwise
or counterclockwise rotation by simply changing position of the pump.
Each model also has an auxiliary intake port which can be used for
emergency unloading of another tank or transport. In addition, these
pumps have an internal relief valve, patented cavitation suppression liners
to reduce noise, vibration and wear.
Standard construction materials for both models include Buna-N
mechanical seals and Duravanes for handling both LP-gas and anhydrous
ammonia. The casing liner and end discs are replaceable for easy
TLGLF3 cutaway rebuilding of the pumping chamber if ever necessary.

The TLGLF3 is widely used on bobtails because of its compact mounting

arrangement, with a 3-inch ANSI intake flange and 2-inch auxiliary intake
and discharge ports. Capacities range from 60 to 129 U.S. gpm (227 to
488 L/min).

The TLGLF4 offers maximum output rates, and fast turnaround time for
transports. It is designed with 4-inch ANSI intake flange, a 3-inch
auxiliary intake port, and twin 2-inch discharge ports which permit the use
of two hoses, if necessary, to reduce pressure loss when unloading into
restrictive receiving systems. Capacities range from 200 to 350 U.S. gpm
(757–1,325 L/min).

Maximum differential pressure for both models is 125 psi (8.62 Bar).

Hydraulic Drive Packages

Blackmer 2-inch through 4-inch pump models are offered with
complete factory engineered hydraulic drive packages. Blackmer highly
recommends the use of hydraulic drive systems to maximize pump
TLGLF4 cutaway
performance and extend equipment life, especially on truck mounted
bobtail and transport pumps.

The Hydrive cooler by Mouvex®, a Dover® Company, forms the heart of

Hydrive Cooler
a hydraulic drive system, and offers up to 26 horsepower (19.4 kW) of
actual heat dissipation. The Hydrive has a compact design with stainless
steel. It protects the system during cold start-up, allows for remote system
on/off control, and provides both system cooling and monitoring of oil
filtration.

A typical hydraulic drive package includes a P.T.O., hydraulic pump, Hydrive

cooler, cargo pump control valve, speed control valve, hydraulic motor,
and mounting hardware. Hydraulic motor adaptor kits are also available
to retrofit existing Blackmer LP gas pumps for hydraulic drive operation.

Hydraulic Pump/P.T.O.
Cargo Pump

13
 Selection Data
Pump delivery and brake horsepower requirements are listed in the table below for various differential
pressures. The same data for all pressures is provided in the performance curves below.

Maximum
Approximate Delivery of Propane at Differential Pressures Maximum
Standard Pump Differential
and Pump Speeds Shown1 Working Pressure2
Pressure
Pump
50 psi (3.45 Bar) 100 psi (6.89 Bar)
Factory Speed rpm
Model Relief Valve Torque Torque psi Bar psi Bar
gpm L/min bhp kw gpm L/min bhp kw
Setting ft-lb kg-m ft-lb kg-m
870 129 488 6.5 4.8 45.9 6.3 119 450 10.9 8.1 72.5 10 125 8.62 350 24.13
800 118 446 5.1 3.8 44.2 6.1 107 405 8.7 6.5 69.7 9.6 125 8.62 350 24.13
150 psi 650 93 352 4.3 3.2 40.4 5.6 83 314 7.9 5.9 63.7 8.8 125 8.62 350 24.13
TLGLF3
(10.34 Bar) 600 85 322 4 3 39.3 5.4 75 284 7.1 5.3 62.2 8.6 125 8.62 350 24.13
500 70 265 3.6 2.7 37.4 5.2 68 257 6 4.5 61.5 8.5 125 8.62 350 24.13
400 52 197 2.8 2.1 36.2 5 40 151 4.8 3.6 60.8 8.4 125 8.62 350 24.13
800 350 1,325 22 16 143 20 306 1,158 34 25 223 31 125 8.62 350 24.13
650 280 1,060 15.5 11.6 125.2 17.3 245 927 25.0 18.6 201.9 27.9 125 8.62 350 24.13
150 PSI
TLGLF4 600 260 984 14.3 10.7 125.1 17.3 220 833 23.0 17.2 201.3 27.8 125 8.62 350 24.13
(10.34 Bar)
500 210 795 11.9 8.9 125.0 17.3 170 644 19.0 14.2 199.5 27.6 125 8.62 350 24.13
400 160 606 9.5 7.1 124.7 17.2 120 454 15.2 11.3 199.5 27.6 125 8.62 350 24.13
1 Check the pump’s delivery and brake horsepower requirements in the performance curves below. See footnote with the curves which explains the factors that can cause delivery to vary.
2 Maximum rated working pressure is 350 psi (24.13 Bar) for LPG and NH3 (limited by U.L. and N.F.P.A. 58).

Note: Refer to back cover for external bypass valve information.

Performance Curves Available Companion Flanges

TLGLF3
TLGLF3 TLGLF4TLGLF4
and Flanged Elbows
160 RPM RPM
U.S. GAL / MIN.

500 400
U.S. GAL / MIN.
LITERS / MIN.

120 870 1200

LITERS / MIN.

400 800 300 800

300 80 650 640 Pump Discharge Auxiliary Intake Intake
800 200
200 600 520
100 40 500 400 420
400 100 350
0 0
0 0 2” NPT Flanged
870 40 800 2” NPT Flanged Elbow
12
36
800 2” Weld Flanged 2” NPT Flanged Elbow 3”
10 32 Elbow
650
640 300 lb.
BRAKE HP REQUIRED

BRAKE HP REQUIRED

600 28
8 TLGLF3 2” NPT 2” Weld Flanged ANSI
500 24 520
Flanged Mounting
6 20
400 420 2” Weld Flanged Flange
16 350
2” Weld Elbow
4 12 Flanged
2
8 Blanking Flange
4
0 0
0 20 40 60 80 100 120 0 20 40 60 80 100 120 3” NPT Flanged
DIFFERENTIAL PRESSURE PSI DIFFERENTIAL PRESSURE PSI
4”
0 2 4 6 8 0 2 4 6 8 Twin 2” NPT Flanges 3” Weld Flanged 300 lb.
BAR BAR
TLGLF4 ANSI
NOTE: Blackmer Characteristic Curves are based on Brake Horsepower (BHp). To determine Motor Horsepower, drive train inefficiencies must be added to the BHp. Twin 2” Weld Flanges Blanking Flange Mounting
These curves are based on approximate delivery rates when handling propane or anhydrous ammonia at 80ºF (26.7ºC). Line restrictions such as excess flow valves,
elbows, etc., will adversely effect deliveries. For propane at 32ºF (0ºC), actual delivery will be further reduced to about 80% of nominal. Delivery of butane at 80ºF Flange
(26.7ºC) will be 60 to 70% of these values, and may run as low as 35 to 45% at 32ºF (0ºC). This loss of delivery is not a pump characteristic but is caused by natural
thermodynamic phenomena of liquefied gases. 4” Weld Flanged

LPG Pump Warranty – One Year Performance Assurance

Should any Blackmer LPG pump (LGL, TLGL and LG models) This offer is limited to one claim per installation.
or bypass valve fail in the transfer of propane, butane and
PLEASE NOTE: For the One Year Performance Assurance to
propane/butane mixture within one (1) year of the original
be valid, a Blackmer Pump Warranty Registration must be
installation or eighteen (18) months after shipment from the
supplied to Blackmer via web registration or postcard.
factory, regardless of cause (except for intentional or gross
misuse), free replacement components will be provided to For additional information, see Blackmer LPG Pump
return the pump to as new performance. Warranty page #001-004.

14
 LB081, LB161, LB361, LB601 & LB942 Compressors
Oil-Free Gas Compressors for Liquid Transfer and Vapor Recovery
Blackmer oil-free gas compressors deliver high efficiency in Gas compressors for vapor recovery
handling propane, butane, anhydrous ammonia and other When the liquid transfer phase has been completed, a
liquefied gases. They are ideal for rail car unloading and significant amount of product (vapor and liquid) is left in the
vapor recovery applications. The single-stage, reciprocating tank car (often 3% or more of the tank’s capacity). Recovery of
compressors are designed to give maximum performance and product with a compressor is a simple operation, and thus a
reliability under the most severe service conditions. All pressure compressor can quickly pay for itself.
parts are of ductile iron construction for greater resistance to
both thermal and mechanical shock. They are designed for ease How vapor recovery is accomplished
of maintenance, with all components readily accessible. Vapor recovery is accomplished with the use of a four-way
Models are available with capacities from 7 to 125 cfm (11.9 to valve. By rotating the valve handle 90°, gas flow is reversed
212 m3/h) with working pressure up to 350 psia (24.13 Bar). and the vapor pressure within the supply vessel is reduced. At
this point, remaining liquid vaporizes and is quickly recovered.
Gas compressors for liquid transfer As the tank pressure is drawn down further, remaining vapors
Many liquid transfer applications can be handled more are also recovered to an economical level. Recovered vapor is
efficiently with a gas compressor than a liquid pump. They discharged into the liquid area of the receiving tank and then
include unloading of transports and pressure vessels where condensed back into a liquid state.
system piping restricts flow and may cause a pump to cavitate;
unloading of LP gas from rail cars, and other installations that
require an initial lift to the liquid.

How liquid transfer is accomplished

When transferring liquid, a compressor creates a slight pressure
differential between the vessel being unloaded and the receiving
tank. The suction stroke of the compressor piston draws in vapor
and decreases the receiving tank pressure. The discharge stroke
moves a measured volume of vapor at a higher pressure into the
supply tank where it displaces an equal volume of liquid through
a separate line into the receiving tank. Generally, the liquid flow
rate will be 5 to 6 U.S. gpm for each cubic foot (ft3) of piston
displacement (670 - 775 liters per cubic meter [m3]).
Tank car vapor recovery system

Propane Vapor Recovery

The chart and graph illustrate typical volumes of liquid that may be recovered Volume Recovered From 33,000
at various pressures and operating times, based on a 33,000 U.S. water gallon U.S. Gallon Tank (124,915 Liters)
capacity (124,915 liters) tank car – using a Blackmer LB361 gas compressor with
14 200
36 CFM (60.3 m3/h piston displacement).
12 175
For example, when the liquid transfer phase of unloading is completed, the 150
10
TANK PRESSURE BAR

TANK PRESSURE PSI

vapor pressure reads 150 psig (10.34 Bar gauge). At this condition, there would 125
8 1,1
be approximately 1,315 100 53
84 (43
Beginning Tank Total Product 1 Economically U.S. gallons (4,978 6 5( .65
31
Pressure (In Vapor Form) Recoverable Product 2 75 580 .99 )
(21 )
PSIG Bar U.S. Gals. Liters U.S. Gals. Liters liters) of LP gas in 4
50 .90
)
419
200 13.79 1,650 6,246 1,153 4,365 vapor form remaining 2
(15.8
25 6)
175 12.07 1,485 5,621 969 3,668
150 10.34 1,315 4,978 845 3,199 in the tank car. Of 0 0
0 1 2 3 4 5
125 8.62 1,137 4,304 713 2,699 this amount, 845 U.S. HOURS
100 6.89 953 3,607 580 2,196
75 5.17 760 2,877 441 1,669
gallons (3,199 liters)
Overall efficiency of plant piping may improve or detrimentally affect compressor performance.
50 3.45 561 2,124 419 1,586 can be economically All figures are approximate and rounded off for easy reading.
1 Physical properties are based on N.F.P.A. 58 data for commercial propane. Vapor pressure 205 psig (14.13 Bar) Additional information for liquefied gases other than propane is available: consult your
@ 100ºF (37.8ºC). recovered in less than Blackmer representative.
2 Economically recoverable product is based on reduction of tank pressure to 25% of original value. Residual
liquid not included.
three hours.
Note: A different size tank will have a proportional relationship to the values shown above. For example, a 10,000
U.S. gallon (27,850 liters) tank would represent 30.3% of the values given.

15
 Design Features

High efficiency valves

move more gas volume Ductile iron pistons
Heavy-duty ductile iron pistons are
The heart of any compressor
connected with a single positive locking
is its valve assembly and Blackmer
nut which eliminates potential problems
valves are specifically designed for
associated with more complex designs.
non-lubricated gas applications.
With precisely engineered clearances,
spring tension, and a special finish,
these valves seat more positively so
more gas is moved with each piston
stroke. Blackmer valves offer greater
strength, quiet operation, and long life.

Self-adjusting piston rod

O-Ring seals - seals
head and cylinder Crankcase oil contamination and
The head and cylinder are sealed with cylinder blow-by is prevented with
O-rings to ensure positive sealing loaded glass-filled PTFE seals which
under all operating conditions. maintain a constant sealing pressure
around the piston rods.

Ductile iron
construction
All pressure parts are
of ductile iron for
greater resistance
Pressure assisted piston to both thermal and
rings for positive seating mechanical shock.
Constructed of self-lubricating
PTFE, Blackmer’s special ring design
provides maximum sealing efficiency
with minimal friction wear. The result:
peak performance and extended
compressor service life. LB361 cutaway

Wear-resistant crosshead
Heavy-duty crankshaft assemblies
Designed for maximum lubrication
The ductile iron crankshaft is precision
and wear resistance.
ground with integral counterweights
for smooth, quiet operation.
Pressure lubricated bearings Multiple seal options
Rifle drilling ensures positive oil A rotary oil pump provides positive oil For applications that require maximum
distribution to the wrist pin and distribution to all running gear components leakage control, double and triple piston
connecting rod bearings. for long life and minimal wear. rod seals with distance piece chambers
are available.

16
 Compressor Selection Data

Engineering Specifications
To select a compressor that
Compressor Model
best fits your application LB161 LB361 LB601 LB942
LB081
requirements, use the charts LB162 LB362 LB602 LB943
shown. The data provided is Bore - Inches (mm)
3.0 1 3.0 2 4.0 2 4.625 2 4.625 3
(76.2) (76.2) (101.6) (117.4) (117.4)
based on approximate delivery 2.5 2.5 3.0 4.0 4.0
Stroke - Inches (mm)
rates when handling propane (63.5) (63.5) (76.2) (101.6) (101.6)
Piston Displacement CFM (m3/h) 1.0 2.0 4.3 7.7 14.9
or anhydrous ammonia. Actual @ 100 rpm (1.7) (3.4) (7.3) (13.1) (25.38)
capacities will depend upon
line restrictions, size and @ 825 rpm 8.2 16.5 35.5 63.5 123
length of piping. Horsepower (14.0) (28.0) (60.3) (107.9) (209)
Compressor Speed
requirements for both liquid Minimum rpm 350 350 350 350 350
transfer and vapor recovery Maximum rpm 825 825 825 825 825
Maximum Working 350 350 350 350 350
applications are based on Pressure - psia (Bar) (24.13) (24.13) (24.13) (24.13) (24.13)
moderate climatic conditions. Maximum Brake 5 7.5 15 40 50
Horsepower (kw) (4) (6) (11) (30) (37)
Max. Discharge 350 350 350 350 350
Temperature ºF (ºC) (177) (177) (177) (177) (177)
Max. Compression Ratio4
Continuous Duty 5 5 5 5 5 5
Intermittent Duty 5 9 9 9 9 9
1 One single-acting cylinder
2 Two single-acting cylinders
3 Two double-acting cylinders
4 Compression Ratio defined as absolute discharge pressure divided by absolute inlet pressure.
5 Compression Ratios are limited by discharge temperature. High compression ratios can create excessive heat,
i.e., over 350°F (177°C). The duty cycle must provide for adequate cooling time between periods of operation to
prevent excessive operating temperature.

LB601
LB361LU

Compressor Selection Data: Propane and Anhydrous Ammonia

Approximate Liquid Pipe Diameter3
Speed Piston Displacement Driver Size2
Model Transfer Delivery1 Vapor Liquid
RPM U.S. GPM L/min CFM M3/H HP KW in. mm in. mm
425 25 93 4.2 7.2 1.5 1.1
0.75 19
560 32 123 5.6 9.5 3 2
LB081 715 41 157 7.2 12.2 3 2 1.5 38
780 45 171 7.8 13.3 5 4
810 46 174 8.1 13.8 5 4 1 25
425 49 186 8.5 14.4 3 2
560 65 246 11.2 19.0 5 4
LB161
715 83 314 14.3 24.3 5 4 2 50
LB162
780 90 341 15.6 26.5 7.5 6
810 92 348 16.2 27.5 7.5 6 1⁄ 1
4 32
495 123 466 21.3 36.2 7.5 6
21⁄2 65
540 134 507 23.2 39.5 10 7
LB361
650 161 609 28.0 47.5 10 7
LB362
780 194 734 33.5 57.0 15 11 11⁄2 - 2 38-50 3 80
810 201 761 34.8 59.1 15 11
545 242 916 42.0 72.0 15 11
LB601 655 288 1,090 50.6 85.9 20 15
2 - 21⁄2 50-65 4 100
LB602 755 335 1,268 58.7 99.8 25 19
800 355 1,344 62.2 105.7 30 22
470 400 1,514 70 119 25 19
LB942 565 480 1,817 84 143 30 22
3-4 76-102 6 152
LB943 750 640 2,422 112 190 40 30
800 680 2,575 119 202 50 37
1 Delivery will depend on proper system design, pipe sizing and valve capacity.
2 Horsepower is for liquid transfer and vapor recovery in moderate climates. For liquid transfer without vapor recovery, horsepower will be lower. For severe climates, contact your Blackmer representative for horsepower required.
3 Use next larger pipe size if piping exceeds 100 feet (30 meters).

17
 Standard Compressor Packages HD Series Compressors
Blackmer offers a variety of factory assembled compressor Blackmer also offers a line of single and two-stage industrial gas
packages to fit most application requirements. Standard base compressors with double or triple piston rod seals and air or
mounted units are available in the following styles: water cooling. Consult your Blackmer representative for more
information and specifications.
CO - COMPRESSOR ONLY Includes basic compressor
with flywheel.
Optional Accessories
B - BASE MOUNTED UNIT Includes compressor, pressure Motors: Standard voltage and sizes in stock.
gauges, formed steel base, V-belt drive with belt guard, and
adjustable motor base, less motor. Motor slide rails: Offer easy adjustment for standard motor
frame sizes.
E - EXTENDED SHAFT Includes compressor with flywheel and
extended crankshaft. Engines: Diesel, propane or gasoline fueled engines available.

TU - TRANSFER UNIT Includes compressor, pressure gauges, Liquid traps: Standard liquid traps have a
formed steel base, liquid trap assembly with a mechanical mechanical float to protect the compressor by
float, V-belt drive with belt guard, and adjustable motor base, preventing liquid from entering. These traps may
less motor. be fitted with an electric float switch to sound
an alarm or stop the compressor in the event of
TC or TW - TRANSFER UNIT Includes compressor, pressure high liquid level. Larger traps with ASME code
gauges, steel base, ASME code stamped liquid trap assembly construction and one or two electric float switches
(complete with relief valve and a NEMA 7 electric float are also available.
switch for Propane service), V-belt drive with belt guard, and
adjustable motor slide base. TW units feature welded and Vapor strainer assembly: Features a 30-mesh
flanged piping. replaceable stainless steel screen and ductile
iron body.
LU - LIQUID TRANSFER/VAPOR RECOVERY UNIT
Includes compressor, pressure gauges, formed steel base, Four-way valve: Four-way valves allow easy
liquid trap assembly with a mechanical float, inlet strainer, switching from liquid transfer to vapor recovery
interconnecting piping, 4-way valve, V-belt drive with operation by reversing the system flow direction.
belt guard, and adjustable motor base, less motor. Standard valves are ductile iron with a handle and
easy-to-read flow direction indicator. Valves with
LC or LW - LIQUID TRANSFER/VAPOR RECOVERY UNIT electric or pneumatic actuation are available if
Includes compressor, pressure gauges, steel base, ASME code remote operation is desired.
stamped liquid trap assembly (complete with relief valve and
a NEMA 7 electric float switch for Propane service), inlet Pressure gauges: Standard 1⁄4-inch NPT
strainer, interconnecting piping, 4-way valve, V-belt drive with liquid-filled for head mounting.
belt guard, and adjustable motor base, less motor. LW units Extended crankshaft: For direct drive mounting,
feature welded and flanged piping. or V-belt drive applications.

Base plates: Formed steel or fabricated skid type.

Belt guards: Heavy-duty 14-gauge steel, stainless

All Compressor models are available with or without motors or steelor non-sparking aluminum construction.
accessories. Special engine drives, control panels and custom
emergency evacuation units can be furnished on
a special order basis.

Blackmer compressors can also be mounted on transports with

direct drive or V-belt drive, as shown below.

Direct Drive V-Belt Drive

Custom-engineered
LPG transfer compressor package

18
 Bypass Valves Precise, On-Line Pressure Protection

Maximum flow through valve

Maximum Rated Flow* - gpm (L/min) @
Model 20 psi 50 psi 80 psi 120 psi
(1.38 Bar) (3.45 Bar) (5.52 Bar) (8.27 Bar)
25 40 50 60
BV0.75 / BV1
(95) (151) (189) (227)

60 80 100 125
BV1.25 / BV1.5
(227) (303) (379) (473)

150 180 220 250

BV2
(568) (681) (833) (946)
*Normal maximum bypass flow rates without significantly exceeding the set pressure limit.

In operation, Blackmer valves provide exceptionally close

pressure control, even under widely varying bypass flow
BV2 conditions. The performance curve in Figure 4 below
BV.075 / BV1
shows how a Blackmer valve maintains a virtually constant
pressure of 100 psi (6.89 Bar) even as the volume being
Selection Guide BV2 cutaway
bypassed rises from 10 gpm to 100 gpm (38-378 L/min).
Model BV0.75 (ports are 3⁄4-inch NPT tapped) Although the curve is that of a BV1.5" valve, the precision it
Model BV1 (ports are 1-inch NPT tapped)
demonstrates is typical of any Blackmer valve.
These models are commonly used for cylinder-filling system. Either valve can be used with 1.25 or
1.5-inch Blackmer pump models. Blackmer bypass valves have no small, easily plugged,
Model BV1.25 (ports are 1-1⁄4-inch NPT tapped) sensing passages; and with only two moving parts, their
Model BV1.5 (ports are 1-1⁄2-inch NPT tapped) operation is simple and reliable. They open precisely at the
These models are normally used for bobtail trucks and smaller bulk plant systems. Either valve can preset spring pressure, and they close smoothly and quietly,
be used with 2 or 3-inch Blackmer pump models. Both valves are available with optional springs
for use with the LGL 158 or LGLH2. thanks to the dash-pot design. As shown in Figure 5, a
small chamber in the valve stem fills with liquid when the
Model BV2 (ports have 2-inch NPT companion flanges, 1-1⁄4-inch and 1-1⁄2-inch NPT and WELD
bolt-on flanges are available) valve opens. This liquid then provides a hydraulic cushion
The BV2 model is widely used for transports or larger bulk plant systems. preventing the valve from slamming shut if pressure is
It is recommended for use with 3 and 4-inch Blackmer pump models. The BV2 is factory set
at 125 psi. suddenly released. It also minimizes chatter and valve seat
wear when pressures hover around the crucial limit.
Blackmer differential bypass
valves are designed to protect FIGURE 4. Bypass volume/pressure curve BV1.5 FIGURE 5. Bypass valve
pumps and system components operation
125
from excessive pressure
damage, and no LP gas pump 100
installation is complete without
BYPASS FLOW (GPM)

one. Blackmer offers five 75

different models that provide
full-flow pressure control to 250 U.S. gpm (946 L/min) at 120 50

psid (8.27 Bar). Installation is easy with NPT tapped ports in

sizes from 3⁄4" to 2". All models are suitable for both LP gas and 25

anhydrous ammonia service.

0
90 95 100 105
Technical Assistance DIFFERENTIAL PRESSURE SETTING (PSI)

In some applications, selecting the right pump or compressor Dash-pot chamber cushions
may require more detailed information than can be presented in closing of valve
this bulletin. Your Blackmer representative can help you find the
correct equipment to ensure the best performance possible for The BV0.75 , BV1, BV1.25, and BV1.5 are all UL Listed
your specific application. for 200 PSI differential.

If you have a unique gas or fluid handling problem, please

contact Blackmer at the telephone or fax number listed below.

View maintenance and training videos online at

http://www.youtube.com/BlackmerGlobal/.

19
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PSG® reserves the right to modify the information and illustrations contained in this document without prior notice. This is a non-contractual document. 01/2019

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