BBS and CD Between Bearings Single Stage Pumps

The BBS and CD models are API 610 (ISO 13709) Type BB2, single stage, radially split pumps. They offer the widest range of hydraulic performance in the industry.


The double suction impeller provides reduced NPSH3 for tough services in refineries and other critical applications. The CD can be custom engineered for high pressure, special hydraulics and special nozzle locations.

Main benefits

  • Centerline support for reduced thermally induced misalignment
  • Double suction impeller for low NPSH3
  • First critical speed is well above operating speed range for smooth operation
  • Casing designed for 2 times API 610 nozzle loads for freedom from piping distortions
  • Grouted or Ungrouted, 1x or 2x nozzle load baseplates for reduced installation cost

Main applications

  • Low pressure unit charge
  • Atmospheric or Vacuum Bottoms
  • Fractionator Bottoms
  • High temperature Oil Sands processing with abrasive resistant coatings
  • Boiler Feed booster

Main design features

  • Centerline supported casing with top / top nozzles; side / side nozzles optional
  • Thermal expansion features
  • Staggered vane double suction impeller on larger sizes
  • Proven Coke Crusher option
  • SUME coatings for abrasion resistance

Key characteristics


Up to 7,000 m3/h / 30,000 USgpm


Up to 800m / 2,600 ft


Up to 50 bar / 740 psi


Up to 425 °C / 800 °F

Discharge sizes

From 150 to 600 mm / 6 to 24 inches

Maximum speed of rotation

Up to 5,500 rpm

Performance range

Performance range 50 Hz

BBS and CD performance range 50hzClick to zoom

Performance range 60 Hz

 BBS and CD performance range 60hzClick to zoom


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