What is the Function of an Automotive Pressure Relief Valve?

[MacGeorge]

Pressure relief valves, also known as safety valves, can automatically open and close based on the system's working pressure, primarily installed on equipment or pipelines of closed systems to provide certain protection for system safety. When the pressure reaches the upper limit, the pressure relief valve can automatically open to reduce pressure and ensure safety. Below is the working principle of an automotive pressure relief valve: When the pressure in the pipeline exceeds the set pressure of the relief valve, the oil will flow out from the relief valve, thereby controlling the pressure in the pipeline not to exceed a certain limit. Needle-type pressure relief valves adjust the tightening force by changing the length of the spring force in the valve. When the pressure in the pipeline is higher than the set value, the spring is compressed in reverse, causing the sealing needle to open and allowing the oil to leak out, thus protecting the equipment and regulating the system pressure.