A pressure valve operates based on a simple mechanism. It comprises:

A valve body: This houses the main components.

An inlet: This is where the pressurized fluid (liquid or gas) enters.

A disc: This is held against the valve seat, under normal conditions, by a spring.

A spring: Adjusts to set the desired maximum pressure limit.

When the pressure in the system surpasses the set limit, the force exerted on the disc overcomes the spring’s tension, causing the valve to open. This allows excess pressure to be vented or diverted, thus safeguarding the system.