What is the function of a pressure relief valve?

[VanMarley]

The function of installing a pressure relief valve is to automatically open or close when the system reaches the upper limit of safe working pressure, thereby reducing the working pressure and ensuring system safety. A pressure relief valve, also known as a safety valve, is a device that can automatically open or close based on the system's working pressure. It is generally installed on equipment or pipelines of a closed system to protect system safety. A pressure relief valve consists of components such as a needle valve, pressure gauge, main valve, pilot valve, and connecting pipes. The main valve is divided into upper and lower parts by a diaphragm, with the lower chamber serving as the water flow channel and the upper chamber as the control room, which regulates the opening and closing of the main valve disc.