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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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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 LGLD2-4 Sliding Vane Pump_1 Blackmer LGL2 Sliding Vane Pump_3 Blackmer LGL2 Sliding Vane Pump_2 Blackmer LGL2 Sliding Vane Pump_4 Blackmer LGLD2E Sliding Vane Pump

LGLD2-4 Sliding Vane Pumps Ductile-Iron Multi-Purpose Propane Pumps for Bulk Plants, Terminals and Truck Systems

As part of the Cavitation Line of sliding vane pumps, these LGLD propane pumps are ideal for propane, LPG, butane and anhydrous ammonia applications including bulk plant service, multiple cylinder filling applications, vaporizers, bobtails and transports. All LGLD propane pump 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.

Blackmer® LGLD2 propane 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-in rotary vane pump models can be mounted to a transport in a number of different ways, generally near or between the tank landing gear brackets.

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 Sliding Vane Pump (2, 3 & 4-inch size). 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 (NH3) 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 with internal relief valve
  • Durable pumps for fast and quiet operation, providing sustained performance and trouble-free operation
  • LGLD2 and LGLD3 models have double-ended drive shaft arrangement, popular for bobtail service
  • Blackmer mechanical seal and ball bearing construction provide maximum reliability
  • Symmetrical bearing support assures even loading and wear for long life
  • Capable of being mounted to a truck or chassis of a bobtail, or to a steel pad welded to the tank.
  • Internal relief valve protects pump against excessive pressures
  • 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
  • Butane
  • Anhydrous ammonia
  • Bulk plant service
  • Multiple cylinder filling applications
  • Vaporizers
  • Bobtail trucks
  • Transport trucks
UL-LISTED for use in Propane, Butane, and Anhydrous Ammonia

Performance and Specifications

  • LGLD2
  • LGLD3
  • LGLD4
  • LGLD2: 30 - 105 gpm (114 - 397 L/min)
  • LGLD3: 60 - 201 gpm (227 - 761 L/min)
  • LGLD4: 150 - 370 gpm (568 - 1,400 L/min)
  • LGLD2: 350 - 980
  • LGLD3: 350 - 980
  • LGLD4: 350 - 800
  • 0.2 - 10 cP
  • Duravane
  • 350 psi (24.1 bar)
  • Side Inlet | Top 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)

LGLD 2-4 inch Nominal Flow Rate Range

LGLD 2-4 inch Nominal Flow Rate Range


Pump Model L W H Approx. Wt.
LGLD2 in 13-4/9 9-11/16 10 85 lb
mm 341.3 246.1 254 38.6 kg
LGLD3 in 20-3/8 13-1/4 13-3/8 160 lb
mm 517.5 336.6 339.7 72.6 kg
LGLD4 in 16-3/8 16-15/16 15-4/9 205 lb
mm 415.9 430.2 392.2 93 kg

Materials of Construction

Casing, Heads, Relief Valve Cover Ductile Iron: ASTM 536
Discs, Liner Cast Iron: ASTM A48
Bearing Covers Steel
Bearing Locknut and Lockwasher Steel
Rotor Ductile Iron: ASTM 536
Shaft High Strength Steel
Relief Valve Cast Iron: ASTM A48
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 OPTION Top Outlet: Outlet 90º offset from inlet 
Gearbox Unit: Pump, Gearbox, Motor, Baseplate, Couplings, Guards
Belt Unit: Pump, V-Belt Drive, 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
LGLD2E, LGL2E Kit - Maintenance – NH3 or Dual Service (QA) 898979
LGLD2E Kit - Rebuild – NH3 or Dual Service (QA) 899079
LGLD3F, LGL3F Kit - Maintenance – NH3 or Dual Service (QA) 898981
LGLD3F Kit - Rebuild – NH3 or Dual Service (QA) 899081
LGLD4B, LGL4B Kit - Maintenance 898922
LGLD4B Kit - Rebuild (LGLD4B) 899022

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