A turbine valve designed to prevent the turbine from overheating during a turbine trip or shutdown by discharging hot, trapped steam to a low-pressure area is called which valve?

A turbine valve designed to prevent the turbine from overheating during a turbine trip or shutdown by discharging hot, trapped steam to a low-pressure area is called which valve?

• A. Relief Valve
• B. Stop Valve
• C. Ventilator Valve
• D. Gate Valve

Answer: (C)

When a turbine trips or is shut down, steam that remains in the turbine casing can overheat the blades and components. A ventilator valve provides a controlled path for that hot, trapped steam to escape to a low-pressure area (such as the condenser or a vent header). This keeps temperatures in check and protects the turbine from damage during shutdown. Relief valves are for general overpressure protection and vent to a lower pressure, but they aren’t specifically the device used to relieve trapped turbine steam to prevent overheating. Stop valves and gate valves are used to stop or isolate flow, not to vent steam to a lower-pressure region.

When a turbine trips or is shut down, steam that remains in the turbine casing can overheat the blades and components. A ventilator valve provides a controlled path for that hot, trapped steam to escape to a low-pressure area (such as the condenser or a vent header). This keeps temperatures in check and protects the turbine from damage during shutdown.

Relief valves are for general overpressure protection and vent to a lower pressure, but they aren’t specifically the device used to relieve trapped turbine steam to prevent overheating. Stop valves and gate valves are used to stop or isolate flow, not to vent steam to a lower-pressure region.