GP Ring Section Type Pump

Horizontal, multi-stage, ring section type pump

The GP type is a horizontal, between bearings, multi-stage, radially split, single case, ring section type centrifugal pump designed to meet the API 610 latest edition (BB4 type) specification. It is engineered to be the most reliable and exceptional pumping solution for the most demanding high-pressure and high-temperature applications across industries.

Operation Limits

Capacity up to 900 m³/hr (4000 gpm)
Head up to 4,000 m (13,120 ft)
Maximum Pressure up to 416 bar (6000 psi)
Temperature up to 205 °C (400 °F)
Discharge flanges sizes 2'' to 8''
Applications High-pressure and high-temperature applications like: Boiler feed, Water injection, Desalination, Refining, Hydraulic decoking, Reverse osmosis.


Ruhrpumpen's GP pump features a compact design, together with high efficiency hydraulics. It is engineered to provide superior performance and exceptional reliability combined with easy maintenance and minimal operating costs.

The GP pump is available in API 610 11th edition (ISO 13709) and non-API builds. Moreover, it was designed to meet requirements of ATEX (Explosion Protection Directive 94/9/EC ) Category 2 G and 3 (for use in Zone 1 and Zone 2).

  • Horizontal, multi stage, radially split centrifugal pump
  • Single suction impeller
  • Ring-section type
  • Between bearings
  • Centerline mounted
  • API 610 11th edition compliant (BB4 type)
  • Designed for dual pressure ratings
  • CCW rotation

Heavy-duty design according to API 610 requirements

  • Modular design for small and large number of stages
  • “Blind” stages for future upgrades available
  • Single and double mechanicals seals available
  • Stiff shaft design
  • Thrust balancing by balance disk or balance drum
  • Low NPSH first stage design is available
  • Intermediate stage (‘IM’) to accommodate inter- stage take off
  • ‘A’ and ‘B’ Series stage hydraulics available to match different head/flow requirements with maximum efficiency


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