What is the function of a pressure relief valve in a feedwater system?

The function of a pressure relief valve in a feedwater system is crucial for ensuring the safety and integrity of the system. Specifically, the pressure relief valve serves to prevent overpressure conditions that could result in catastrophic failures, such as pipe ruptures or equipment damage. This protective device allows excess pressure to be safely released, thereby maintaining system pressure within the desired operational limits.

By operating automatically when a preset pressure threshold is exceeded, the pressure relief valve protects the feedwater system and its components, including the boiler and associated piping. This safety mechanism is essential to prevent not only physical damage to the equipment but also to safeguard the safety of personnel working with the system.

In contrast, enhancing water flow into the boiler, regulating the temperature of the water, and filtering impurities are functions served by other components within the feedwater system. These functions do not address the critical need for pressure management, which is the primary role of the pressure relief valve.