What device is used to prevent overpressure in a steam turbine system?

The device used to prevent overpressure in a steam turbine system is a safety valve. Safety valves are critical components designed to protect pressure vessels and piping from excessive pressure that could lead to dangerous situations, such as equipment failure or explosions.

When the pressure in the system exceeds the predetermined safe level, the safety valve automatically opens, allowing steam to escape, thereby reducing the pressure back to a safe range. This mechanism ensures the integrity of the turbine system is maintained and guards against the potential risks associated with overpressure.

Pressure gauges serve to monitor the system's pressure but do not actively intervene to prevent overpressure situations. Flow restrictors are used to control the rate of fluid flow, while strainers filter out debris from the fluid, neither of which are designed to manage pressure levels directly.