The VBSE is a high-performance turbine bypass valve engineered for steam throttling and desuperheating in ultra-supercritical power plants. It manages steam start-up and load rejection by bypassing steam to reheat lines until the temperature matches turbine requirements. With a forged body, modular trim, and spring-loaded spray water injection, the VBSE delivers reliable control under extreme conditions. It is available with hydraulic, electric, or pneumatic actuation and features a pressurised seal bonnet for high-pressure integrity. Easy access to internals, a reduced component count, and a choice of plug designs support long service life, low maintenance, and exceptional flow control accuracy.

Key features

Designed for supercritical power plants

Forged angle body, flow-to-close

Pilot-operated welded trim

Spray water injection with spring-loaded nozzles

Temperature: up to 630°C

Inlet pressure: up to 350 bar

Seat leakage: EN 12266-1 Cl. B / MSS-SP61 / ANSI FCI 70.2 Cl. V

Hydraulic, electric, or pneumatic actuator

Noise-reducing drilled bonnet cage

Certified to PED 2014/68/EU