Z-Model Sliding Vane Pump Overview

The Z-Series Coro-Vane® pumps, the newest line of sliding vane pumps offered by Corken, are designed with our patented needle roller thrust bearing rated for 4,000 lbs. The needle roller thrust bearings protects the pump against dynamic impact loads imposed on the pump by the drive system. Premature failures due to axial thrust loads are minimized on truck applications. They have O-ring construction throughout and are rated for 400 psi (28.6 bar) working pressure. Since the Z-models sliding vane pumps are used primarily in LPG (propane & butane) and agricultural ammonia applications, the non-adjustable internal relief valve is pre-set at the factory.

When the application requirements are suitable, Z-model pumps are a great option for many other liquefied gases with high vapor pressures such as natural gas liquids (NGLs), refrigerants, CO2, and many more. Applications include bulk pump transfer, propane delivery truck and transport. Available in 2”, 2.5”, 3” and 4” sizes.

Operating Specifications

  • Flow rates up to 385 gpm (1,457 l/min)
  • Working pressures up to 400 psi (27.6 bar)
  • Differential pressures up to 125 psi (8.6 bar)
  • Temperature range: -25 to 225 °F (-32 to 107 °C)
  • Viscosities up to 20,000 SSU (4,250 cSt)


  • Available in five pump sizes
  • Designed for high pressure applications with a maximum working pressure of 400 psi (28.6 bar)
  • Available in foot and truck mounted designs
  • O-ring construction
  • Six vanes/blades design with vane drivers
  • Mechanically sealed pump with two sealing options
  • Depending on the model, available with NPT or ANSI flanges
  • Approved by Underwriters’ Laboratories (UL) for LPG and agricultural ammonia service
  • Hydraulic drive option available


  • Pump casing and heads: Ductile iron
  • Cam and sideplates: Gray iron
  • Rotor and flanges: Ductile iron
  • Seal seat: Gray iron or Ni-resist
  • O-rings: Buna-N, PTFE, Viton®, Neoprene®. Registered trademark of DuPont
  • Blades: Advanced polymers


  • Self-adjusting sliding vanes maximizes performance
  • Cam and sideplates can be replaced. Sideplates are reversible
  • Maintenance is simple and cost effective: By simply removing the pump head, you can easily replace the internals without disturbing the piping
  • Can handle small amounts of vapor
  • Excellent suction lift is great for clearing suction and discharge lines
  • Internal relief valve is pre-set at the factory and is not adjustable
  • Agricultural ammonia
  • Butane
  • Propane
  • Many more liqueifed gases
  • Terminal
  • Bulk plant
  • Truck and Transport
  • Mobile (trailers & portable skid units)