Crescent Internal Gear

Crescent Internal Pump

The Crescent Internal Gear (CIG) pump utilizes unconventional gear tooth design and journal bearing technology to deliver long life and maintenance free operation in mission critical applications. CIG pumps are typically utilized on turbine driven generator systems up to 50 megawatts is size.

These pumps are available in single stage design for low pressure operation and in multiple stage design for high pressure operation. Case hardening of the internal components enables the pump to operate at on fuels with viscosity as low as 0.8 centistoke with little to no lubricity. The unconventional gear tooth profile eliminates “trapped” high pressure fluid being carried back to the low pressure side of the pump. The benefit here is fluid-borne pulsation levels are typically in the on half of one percent range.

Strengths of the technology:

  • Modular design – single or multiple stage design allows for either low high pressure capability in a compact design
  • Low noise – typically less than 68 db(A). The proprietary gear tooth profile eliminates trapped fluid and backlash in the gear set which in turn eliminates fluid pulsation and dramatically reduced airborne noise levels
  • Wide Application Range – the Crescent Internal Gear pump series can handle viscosities as low as 0.5 cst and pressures up to 5000 psi

Typical power generation applications:

  • Liquid Fuel or Burner Injection
  • Rotor Jacking
  • Bearing Lift
  • Lubrication
Flow Rates up toPressures to up toMax Fluid TemperatureCIRCOR Brand‚ Series & Pump Type
28 m^3/h
125 GPM
345 bar
5‚000 psi
Crescent Internal Gear

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CIRCOR Industrial

(877) 853-7867 (USA and Canada)
1 (704) 291-2040 (International)

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