Turbine Bypass & Desuperheating Systems

Protecting Your Equipment

Turbine bypass control valves are installed to bypass flow from the steam turbine (high, medium and low pressure) to the main condenser. These valves must control pressure and de-superheat the steam during transient conditions such as start-up, low load and load rejection.

GE bypass valves are designed to withstand temperature shocks on the valve body generated by the sudden impact of the superheated steam. They are equipped with downstream spray-nozzles. In addition, the valves are designed to allow quick removal of seats and cages to reduce maintenance time.

Features & Benefits

Design
  • Thermal stress resistant body design
  • Low-noise design by multi-stage, multi-path trim (VECO type) and/or outlet diffusers
  • Fast opening and closing
  • Long term tight shut-off capability (class V ANSI B 16.104)
  • Broad operating range of valve and water spry nozzles
  • Quick change of seat and cage
  • Cast or forged valve body
  • Globe or angle body type
  • ANSI rating: class 150 to 2,500
  • Size: 4 to 32 inches (10 to 81 cm)
  • CE-PED certification
Experience
  • GE steam turbines: Santee Cooper and Poletti (United States)
  • Third-party turbine: Trino Vercellese (Italy)
  • Nuovo Pignone turbine: Cagliari (Italy)

Control Valves

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