HSM Multi-Stage Split Case Pump

Horizontal, multi-stage, axially split case pump (BB3)

The HSM pump is a horizontal, multi-stage (2 or 4), axially split case centrifugal pump designed and built acording to the Hydraulic Institute (HI) standard (BB3 type). It is a heavy-duty pump engineered mainly for high pressure applications and is part of the HS/ZW range of split case pumps by Ruhrpumpen which includes the: HSC, HSD, HSL, HSR, and ZW models.

Operation limits

Capacity up to 454 m³/h (2,000 gpm)
Head up to 670 m (2,200 ft)
Maximum Pressure up to 51 bar (740 psi)
Temperature up to 121 °C (250 °F)
Applications High-pressure applications like: boiler feed water, petrochemical, water pipelines, chemical, water cooling and circulating water.


  • Hydraulic Institute (HI) design - BB3 type
  • Two and four stages, axially split case centrifugal pump
  • High efficiency, double volute design
  • Single suction, enclosed impellers
  • Counter clockwise rotation viewed from coupling end
  • Oil lubricated bearings
  • Flanged connections
  • Stuffing box allows for packing or mechanical seal
  • All cast iron
  • Cast iron, bronze fitted
  • Carbon steel, iron fitted
  • Cast iron, 316 SS fitted

Other materials available upon request

Pump Performance Chart

Pump curve for RP's axially split case pumps: HSC, HSD, HSL, HSR, HSM, ZW

Ruhrpumpen axially split case pumps performance chart