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Flowserve-IDP-Horizontal - Multistage - Double Case - CSB

Horizontal - Multistage - Double Case - CSB


The CSB is a cost-effective, diffuser-style barrel pump for boiler feed service in combined cycle and start up service in thermal power plants. Multistage, horizontal barrel, diffuser design. Axial thrust balance device with stacked rotor construction.


  • Power

industry sectors

  • Conventional Steam
  • Combined Cycle
  • Concentrated Solar Power (CSP)
  • Flowserve
  • Hydraulic Inst. 
  • ASME Section VIII
Operating Parameters
  • Flows to 1,136 m3/h (5,000 gpm)
  • Heads to 2,438 m (8,000 ft)
  • Pressures up to 310 bar (4500 psi)
  • Temperatures to 250°C (480°F)
Design Range

Size Range:

  • 3" to 10"
  • 5mm to 250mm
Features & Benefits
  • Energy efficiency and operation stability provided by a continuous crossover diffuser that precisely converts velocity to pressure
  • Ease of maintenance resulting from a radially split, inner case sub-assembly that facilitates inspection and maintenance in the field
  • Longer service life due to a high shaft diameter-to-bearing span ratio that results in low shaft deflection to increase bearing, mechanical seal and wear ring life
  • Durability via forged barrel made from homogeneous, high-strength chromium steel for high-pressure performance and erosion-corrosion resistance


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