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Blackmer® is the leading global provider of innovative, high-quality sliding vane, centrifugal, screw and regenerative turbine pump, and reciprocating gas compressor technologies for the safe transfer of liquids and gases.

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Sliding Vane Pumps

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Blackmer Markets

Providing Innovative Product-Transfer Solutions for a Variety of Markets and Applications

Blackmer provides innovative product transfer solutions for many markets and applications, including in the chemical process, energy, transport, military & marine; general industrial, and oil & gas industries.

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Blackmer LGL 600 Sliding Vane Pump Blackmer LGLF125 600 Sliding Vane Pump

LGRL1.25, LGL1.25, LGL1.5 Sliding Vane Pumps Ductile-Iron Motor Speed Propane Pumps for Motor Fueling and Multi-Cylinder Filling

As part of the Cavitation Line of sliding vane pumps, Blackmer® LGRL and LGL propane pumps are ideal for various liquid propane applications, including motor fueling, multiple-station cylinder filling and a variety of small transfer jobs. Available with 1.25- or 1.5-in NPT tapped ports, all of these lpg pump models feature an internal relief valve and a cavitation suppression liner that reduces noise, vibration and wear. These propane transfer pumps can be easily rebuilt to like new conditions, with its replaceable end disc, vanes, and cavitation suppression liner. These rotary vane pumps are ideal for motor fueling, multiple-station cylinder filling and a variety of small transfer jobs for all propane, lpg, butane, and anhydrous ammonia applications and are UL-Listed.

These sliding vane propane pumps are also available with a flanged mounting. Standard LGRLF1.25, LGLF1.25, and LGLF1.5 propane pump models are supplied with an integral bracket and a flexible shaft coupling, ready to accept a NEMA C-face or IEC flanged-face motors. All LGLF sliding vane pumps are available with or without electric motors. 

Blackmer fully Integrated Unit Assemblies are the pre-engineered and pre-designed drop-in pumping solution. These unit assemblies, include motor, gearbox, baseplate, coupling safety covers, and a LGL 1.5-inch Sliding Vane Pump. No alignment required with these pre-configured fully Integrated Unit Assemblies as they are ready for immediate drop-in installation.

Features and Benefits

  • Pumps are listed by Underwriters Laboratory for both LPG and anhydrous ammonia service
  • Cavitation suppression liner design for reducing the noise, vibration, and wear normally caused by entrained vapors
  • Replaceable casing, liners and end discs allow easy rebuilding of the pumping chamber to like-new condition
  • Ductile-iron construction provides greater resistance to both thermal and mechanical shock
  • Durable design provides fast and quiet operation with sustained performance and trouble free operation
  • Latest 6-vane design contributes to reduced noise levels in the pumps
  • All models have 1.25- or 1.5-in sized NPT tapped ports
  • Accepts standard C-face mounted motors
  • Internal relief valve protects pump against excessive pressures
  • Blackmer mechanical seals are specifically developed for non-lubricating liquids
  • Symmetrical bearing support assures even loading and wear for long life
  • Internal relief valve protects pump against excessive pressure buildup
  • External ball bearings are isolated from pumpage by mechanical seals to maximize bearing life and minimize contamination risk
  • Advantages of sliding vane technology:
    • Unique sliding-vane pump design self-adjusts for wear to maintain flow rates
    • Excellent self-priming and dry-run capabilities
    • Sliding vane design provides sustained performance and trouble-free operation
    • Easy maintenance: vanes can be easily replaced without removing the pump from the piping system
    • High suction lift and line-stripping capabilities
    • Low maintenance and low life-cycle costs


  • LPG & anhydrous ammonia
  • Motor fueling
  • Multiple-station cylinder filling
  • Small transfer
UL-LISTED for use in Propane, Butane, and Anhydrous Ammonia

Performance and Specifications

  • Long Coupled: LGRL1.25, LGL1.25, LGL1.5
  • Flanged Motor: LGRLF1.25, LGLF1.25, LGLF1.5
  • LGRL1.25 & LGRLF1.25: 10 - 16 gpm (38 - 60 L/min)
  • LGL1.25 & LGLF1.25: 10 - 21 gpm (38 - 80 L/min)
  • LGL1.5 & LGLF1.5: 15 - 33 gpm (57 - 125 L/min)
  • LGRL1.25 & LGRLF1.25: 1,450 - 1,750
  • LGL1.25 & LGLF1.25: 1,150 - 1,750
  • LGL1.5 & LGLF1.5: 1,150 - 1,750
  • 0.2 - 10 cP
  • Duravane
  • 350 psi (24.1 bar)
  • Side Inlet | Side Outlet
  • 150 psi (10.3 bar)
  • Ductile Iron
  • -25°F to 240°F (-32°C to 115°C)
  • Hydrostatic Test
  • Performance Test
  • NPSH Test
  • Material (actual or typical)
  • Dimensional (pump only or unit)

LGL 1.25-1.5 Nominal Flow Rate Range

LGL 1.25-1.5 Nominal Flow Rate
Pump Model L W H Approx. Wt.
LGL1.25, LGL1.5, LGRL1.25, LGRL1.5 in 9-1/3 9-1/16 9-1/5 30 lbs
mm 236.5 230.2 233.4 13.6 kg
LGLF1.25, LGLF1.5, LGRLF1.25, LGRLF1.5 in 13 9-1/8 8 39 lbs
mm 330.2 230.2 203.2 17.7 kg

Materials of Construction

Casing, Heads, Relief Valve Cover Ductile Iron: ASTM 536
Liner, Discs, Bearing Covers Cast Iron: ASTM A48
Bearing Locknut and Lockwasher Steel
Relief Valve Cast Iron: ASTM A48
Relief Valve Cap Steel
Relief Valve Spring Plated Steel

Pump Options

Options  Details
ORIENTATION OPTIONS Right Hand: INLET is to the right, when looking from driven side
Left Hand: INLET is to the left, when looking from driven side
PORTING OPTIONS Side Outlet: 180° inline porting
Unit: Pump, Motor, Baseplate, Couplings, Guards
SEALING OPTIONS Blackmer single mechanical seal

Vane Options

Material Temperature Limits Viscosity
Duravane -25°F to 240°F (-32°C to 115°C) 0.2 - 10 cP

Elastomer Options

Material Temperature Limits
Buna-N -25°F to 240°F (-31°C to 115°C)

Maintenance Kits

Model(s) Description Part Number
LGRL1.25, LGRLF1.25A, LGL1.25 Kit - Maintenance [8 Vane] 898976
LGRL1.25, LGRLF1.25A Kit - Rebuild [8 Vane] 899076
LGL1.25, LGLF1.25A Kit - Rebuild [8 Vane] 899077
LGL1.5, LGLF1.5A Kit - Rebuild [8 Vane] 899078

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Installation Operation Manuals (IOMs)

LGRL1.25, LGRLF1.25A, LGL1.25, LGLF1.25A, LGL1.5, LGLF1.5A
LGRL1.25, LGRLF1.25A, LGL1.25, LGLF1.25A, LGL1.5, LGLF1.5A

Parts Lists

LGRL1.25, LGL1.25, LGL1.5, LGRLF1.25A, LGLF1.25A, LGLF1.5A

Materials of Construction

LGRLF1.25A, LGRL1.25, LGLF1.25A, LGL1.25, LGLF1.5A, LGL1.5