Guarding valves upstream of the turbine throttle valves are installed for what purpose?

• A. To permit stopping steam flow if throttle valves leak or damaged.
• B. To prevent corrosion.
• C. To regulate steam temperature.
• D. To bypass the turbine.

Answer: (A)

Guarding valves upstream of the turbine throttle valves are there to provide a quick, reliable way to stop steam flow if the throttle valves leak or are damaged. By closing these upstream valves, you can isolate the steam supply and protect the turbine and piping from uncontrolled flow, making it safer to perform maintenance and preventing further damage. They aren’t for preventing corrosion, regulating temperature, or bypassing the turbine.