PRESSURE RELIEF VALVE

A pressure Relief Valve is otherwise called as a safety device which protect a pressurized system or vessel during an over pressure occasion.

An over pressure occasion means any condition which can cause pressure in a system or vessel to increase outside the maximum allowable working pressure or specified design pressure.

The main purpose of a Pressure Relief Valve is safety of property and life by emitting fluid from over pressurized system.

Many pneumatic, hydraulic and electronic systems to control fluid system variables, such as temperature, pressure and flow. These system needs compressed air or electricity to operate but a pressure Relief Valve should be capable of operating at all the times, particularly during power failure when system controls are nonfunctional. The source of power for pressure Relief Valve is the process fluid.