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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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General Industrial

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Blackmer LGL 600 LGLF125 600

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

As part of the Cavitation Line of sliding vane pumps, Blackmer® LGRL and LGL pumps are ideal for various fluid 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 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. In addition, these pumps feature cavitation suppression liners to reduce noise, vibration and wear. These pumps are ideal for motor fueling, multiple-station cylinder filling and a variety of small transfer jobs.

These pumps are also available with a flanged mounting. Standard LGRLF1.25, LGLF1.25, and LGLF1.5 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 LGF units are available with or without electric motors. 

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)
  • 150 psi (10.3 bar)
  • 350 psi (24.1 bar)
  • 0.2 - 10 cP
  • -25°F to 240°F (-32°C to 115°C)
  • LGRL1.25 & LGRLF1.25: 1,450 - 1,750
  • LGL1.25 & LGLF1.25: 1,150 - 1,750
  • LGL1.5 & LGLF1.5: 1,150 - 1,750
  • Ductile Iron
  • Side Inlet | Side Outlet
  • Duravane
  • Hydrostatic Test
  • Performance Test
  • NPSH Test
  • Material (actual or typical)
  • Dimensional (pump only or unit)


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)