All of Corken’s regenerative turbine pumps are known as a Coro-Flo®. The C-model  turbine pump is a close-coupled design that mounts directly to a Corken supplied C-Face motor so no coupling or special alignment procedures are required. With a close coupled design, installation is quick and easy. C-model turbine pumps are designed for low capacity, medium head pumping applications involving liquefied gases such as LPG (propane & butane), CO2, and refrigerant gases. Since the compact,close coupled design is ideal for tight spaces, the C-model Coro-Flo is the pump of choice for dispensing applications like propane cylinder filling stations. Available with NPT or ANSI flange connections.

Operating Specifications

  • Flow rates up to 40 gpm (151.4 l/min)
  • Working pressures up to 400 psi (28.6)
  • Differential pressures up to 125 psi (8.6 bar)
  • Temperature range: -25 to 225 °F (-32 to 107 °C)
  • Viscosities up to 400 SSU (88 cSt)


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  • Available in five pump models
  • Single-stage pump
  • Close-coupled design is compatible with a 1, 2 or 3 hp motor
  • Available with a motor mounted or wall mounted starter
  • Mechanically sealed with standard sealing options only
  • Available with NPT or ANSI flange connections
  • Approved by Underwriters’ Laboratories (UL) for LPG and agricultural ammonia service only


  • Pump case and cover: Ductile iron
  • Impeller: Bronze only
  • Shaft: Steel only
  • Seal seat: Cast iron only
  • Seal sleeve and follower: Aluminum only
  • Seal rotor: Carbon only
  • Seal metal parts: Steel only
  • Seal housing: Cadmium plated steel only
  • O-rings: Buna-N only


  • Ideal for low capacity applications that require medium head
  • Free-floating has no metal-to-metal contact and minimizes wear between the pump casing, impeller and cover
  • The balanced mechancial seal and sleeve enhance the sealing performance
  • No vibration or pulsation – delivers years of quiet trouble-free service
  • Compact, close coupled design eliminates alignment issues and makes installation easy
  • Does not require a coupling and coupling guard so installation costs are minimized
  • By simply removing the pump cover, you can easily replace the internals without disturbing the piping
  • All close coupled motors for a C model pump are equipped with a condensate drain. This feature allows the motor to drain automatically
  • Pump nozzles can be rotated into four 90 degree increments
  • Bypass and pressure gauge connections are provided on the outlet nozzle
  • Continuous-duty service


  • Agricultural ammonia
  • Butane
  • Propane
  • Many more liquefied gases


  • Propane cylinder filling
  • Liquefied gas transfer