All of Corken’s regenerative turbine pumps are known as a Coro-Flo®. The DL-/DLD-/DLF-model regenerative turbine pump is a direct mount made for a standard, two pole C-Face motor with a 8.5″ rabett diameter. A 8.5″ rabett diameter fits 182TC, 184TC, 213TC and 215TC motor frames. The direct mount supports both the pump and motor so they can be directly coupled. Since the it is designed to exact tolerances of the pump and motor, simple assembly will result in proper alignment of the pump and motor shaft. The advantage of a direct mount is no coupling guard, baseplate, or special alignment procedures are required for installation.

The DL-model comes with the standard NPT connections. The DLD-model has DIN flange connections while DLF-model has ANSI flange connections. All of these pumps are designed for liquefied gases such as LPG (propane & butane) agricultural ammonia, natural gas liquids (NGLs), CO2, SO2, refrigerant gases, and many other many more.

Operating Specifications

  • Flow rates up to 50 gpm (189.3 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 nine pump models
  • Single-stage pump
  • A direct mount design utilizes a special bracket that accepts a standard two-pole motor with a 8.5″ rabbet diameter
  • Mounting bracket supports both the pump and motor so they can be coupled directly
  • The DL mount (DL-Model) is a larger version of the DS mount (DS-Model) and allows you to use larger  horsepower motors
  • Direct mount accepts 3 to 10 hp motors
  • Fits 182TC, 184TC, 213TC and 215TC motor frames
  • Mechanically sealed with multiple sealing options
  • Available with NPT or ANSI flange connections
  • Approved by Underwriters’ Laboratories (UL) for LPG and anhydrous agricultural ammonia service


  • Pump case and cover: Ductile iron
  • Impeller: Bronze, ductile iron, steel or stainless steel
  • Shaft: Steel or stainless steel
  • Seal seat: Cast iron, N-Resist, ceramic or tungsten carbide
  • Seal sleeve and follower: Aluminum or stainless steel
  • Seal rotor: Carbon only
  • Seal metal parts: Steel only
  • Seal housing: Cadmium plated steel or stainless steel
  • O-rings: Buna-N, PTFE, Neoprene®, Viton®, ethylene-propylene or Kalrez®. Registered trademarks of DuPont


  • Ideal for low capacity applications that require medium to high head
  • Free-floating has no metal-to-metal contact and minimizes wear between the pump casing, impeller and cover
  • The balanced mechanical seal and sleeve enhance the sealing performance
  • No vibration or pulsation – delivers years of quiet trouble-free service
  • By simply removing the pump cover, you can easily replace the internals without disturbing the piping
  • Pump nozzles can be rotated into four 90 degree increments
  • Most models have bypass and pressure gauge connections on the outlet nozzle
  • Continuous duty service


  • Agricultural ammonia
  • Butane
  • Carbon dioxide
  • Foaming blowing agents
  • Gasoline
  • Light oils
  • Pentane
  • Propane
  • Propylene
  • Refrigerant gases
  • Sulfur dioxide
  • Solvents
  • Many more light liquids


  • Aerosol propellant/filling
  • Liquefied gas transfer
  • Boiler feed (up to 225°F)
  • Vaporizer feed
  • Foam blowing
  • Reflux pump for gas liquids