Rotary vane pumps for LPG and NH3 service

Rotary vane pumps, also known as "sliding vane pumps" are designed for transferring propane/butane and other liquids at a constant flow and are commonly used for bobtail and transport trucks, bulk plants, high capacity LPG fueling and vapouriser feeding.

Product description

The positive displacement rotary vane pumps are specifically designed for high pressure applications. The pumps are used to force low-viscous liquids or LPG into the pipelines or equipment at a constant flow, by cyclical isolation from the inlet. The volume of each cycle in the pump remains constant at a set RPM regardless of the pressure of the discharge. 

icon 3 squares in front of eachother symbolising material


Pump casing and heads: Ductile iron
Cam and side plates: Grey iron
Rotor & flanges: Ductile iron
Seal seat: Silicone carbide
O-rings: Buna-N 
Blades: Advanced polymers

icon a gear with lines going up down left and right symbolising specifications


Gas types: LPG (Propane, Butane), NH3 (Ammonia, Anhydrous ammonia), CO2, natural gas liquids, refrigerants
Connections: Thread, flange, weld
Type: NPT, ANSI #300, neck
Working pressure: Max. 24.1 bar (350 psi)
Flow rate: Up to 1,475 lpm (385 gpm)
Temperature: -32˚C to +115˚C (-25˚F to +240˚F)
Diff. pressure: Max. 13.1 bar (190 psi)
Sizes and range: 1" to 4" (NPT), 3" to 4" (ANSI), 1½" to 4" (weld)
Series available: Z2000, Z3200, Z3500, Z4200, Z4500, 521, 1021, LG1, LGL1.25, LGL1.5, LGLD2, LGLD3, LGLD4, TLGLF3, TLGLF4, LGL3021 and LGLH2
Standards: UL listed, ATEX

*Materials and specifications are subject to generalisation. Our experienced people are ready to help you find the correct fit for your application. 

icon a magnifying glass over a gear symbolising features


  • Original ten blade design with no blade drivers
  • Mechanical seal and ball bearing for ultimate reliability
  • O-ring construction throughout the pump and no gaskets
  • Non-adjustable factory pre-set internal relief-valve
  • Foot mounted, single shaft design only for stationary applications
  • Noise and vibrations reducing cavitation suppression design liner
  • Easy to maintain with low life-cycle costs
  • Durable and trouble-free performance
  • Long life
  • Even loading assurance by symmetrical bearing support
  • Self-priming and dry-run capable
  • High suction lift and line stripping

Did you know?

MAKEEN gas Equpment can provide a complete pump skid, fully assembled with motor, coupling, guard and baseplate

Some models have double-ended drive shaft arrangement, popular for bobtail service

Alternative products

  • Blue side channel pump

    Side channel pumps

    For long-distance transfers of LPG through narrow pipes, side channel pumps are highly suitable. Multi-stage configuration allows for higher differential pressure.

    See our Side channel pumps

Get in touch!

Whether you already know what you need, or you would like the opinion of an expert, we are always ready to help you out.