What is a safety valve?

A safety valve is a pressure-set valve that opens in case of excess pressure and protects the rest of the system. If the pressure in the system rises, the spring of the safety valve is compressed, causing the valve to open and release the excess pressure to remove the risk of explosion and pressure damage.

The design of the valve means that it subsequently closes again to prevent further release of the medium when the pressure ratio has returned to normal. Safety valves must be used where there is pressurized equipment.