High-Temperature Valves for Thermal & Combined-Cycle Plants
From supercritical boiler isolation to HRSG bypass and condenser control — GLB delivers chrome-moly and stainless steel valves engineered for sustained service at temperatures up to 600°C in the world's most demanding power stations.
Valve Solutions Across Power Generation
Purpose-engineered valve solutions for thermal, combined-cycle, and nuclear conventional-side applications — from boiler room to turbine hall.
Thermal Power Plants
Steam isolation, feedwater control, and boiler blowdown valves for coal-fired, gas-fired, and biomass power stations. Chrome-moly body materials (F22, F91, F92) withstand sustained high-temperature, high-pressure steam in superheater and reheater circuits.
Combined-Cycle Plants (CCGT)
Turbine bypass valves, heat recovery steam generator (HRSG) isolation, and attemperator control valves for gas and steam turbine combined-cycle installations. Designed for rapid start-up cycling and frequent load changes.
Nuclear — Conventional Side
Secondary-loop isolation, feedwater, and condenser system valves for the conventional (non-nuclear) side of pressurised water reactor (PWR) and boiling water reactor (BWR) plants. Full traceability and EN 10204 3.2 certification.
Engineered for Extreme Steam Conditions
Power generation applications impose sustained high temperatures, thermal cycling, and zero-leakage demands. Our valves are engineered to meet every challenge.
High-Temperature Steam Service
Superheater and reheater steam lines operate at temperatures exceeding 565°C and pressures above 250 bar. Our valve designs use chrome-moly steels (F91, F92) with controlled heat treatment to maintain creep strength over decades of service.
Thermal Cycling Resistance
Combined-cycle plants undergo daily start-stop and load-following cycles that impose severe thermal stress on valve bodies and bonnets. GLB valves feature flexible wedge gate and pressure-seal bonnet designs that accommodate thermal expansion without seat leakage.
Chrome-Moly Material Expertise
F22 (2.25Cr-1Mo), F91 (9Cr-1Mo-V), and F92 (9Cr-2W) forgings require precise post-weld heat treatment and hardness control. All GLB power-generation valves are supplied with verified PWHT records and hardness surveys per ASME B16.34.
Tight Shut-Off Requirements
Boiler isolation and turbine bypass applications demand zero-leakage performance. Stellite-hard-faced seats, lapped-in sealing surfaces, and metal-to-metal seat designs achieve ASME B16.34 Category A or API 598 zero-leakage test rates.
Relevant Certifications
Every valve supplied for power generation service meets the applicable industry standards and certification requirements.
Valves for Power Generation
Gate Valves
Flexible wedge & parallel slide, 2” to 60”, Class 150–2500. Pressure-seal and bolted bonnet for high-energy steam lines.
View Product RangeGlobe Valves
Precision throttling & isolation, 1/2” to 24”, Class 150–2500. Stellite-seated for feedwater and desuperheater control.
View Product RangeCheck Valves
Swing, piston & tilting disc, 2” to 60”. Reliable backflow prevention for boiler feedwater and condensate lines.
View Product RangeButterfly Valves
Double & triple offset, 3” to 80”. Lightweight isolation for cooling water, condenser, and low-pressure steam service.
View Product RangeDiscuss Your Power Generation Requirements
Share your project specifications and our engineering team will respond with a competitive quote within 24 hours. Chrome-moly, pressure-seal, and high-temperature trim options available.