GSG diffuser style barrel pump for feedwater applications

The competitive choice for feedwater applications

The GSG is a BB5 type pump designed for feedwater applications in fossil and industrial power plants but also large biomass fired plants. The horizontal pump is ready to use without pre-warming and is able to absorb high forces and moments thanks to its centerline mounting.

GSG Diffuser Style Barrel Pump for Feedwater Applications
Main benefits
  • Price competitive multistage barrel pump
  • Centerline mounting absorbs high forces and moments
  • No pre-warming required
  • Hydrodynamic bearings for higher energy services
  • Self equalized tilting pad thrust bearing Kingsbury type to accomodate thrust variations in transient conditions
Main applications
  • Feedwater
Main design features
  • High head per stage and balanced radial loads
  • Diffuser type allows replacement of individual stage pieces 
  • Stacked rotor with staggered keyways to transmit torque
  • Dynamically balanced rotor for smooth operation
  • Design of balance drum and axial thrust bearing for extreme conditions
Performance range
Process Chart of GSG Diffuser Style Barrel Pump for Feedwater Application
Performance range 50 Hz
Related links
  • GSG diffuser style barrel pump
    The GSG pump is the least costly form of ISO 13709 / API 610 Type BB5 high-pressure barrel pumps. The GSG back-to-back rotor stack is supplied on low- density services where rotor stability is critical.

  • Radial split pumps
    Sulzer offers various models of radial split pumps: the GSG and CP are for high-temperature hydrocarbon processes, oil production and offshore crude oil services; the HPcp and HPcpV for water injection to 1000 bars and offshore high energy services; and the HPT for electric utility boiler feed duties.
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