A pressure relief valve is a device mounted on a hot water heater or boiler and is designed to release any high steam pressure in the tank and thus prevent tank explosions. These specialty valves are used for systems that contain gases and liquids in a variety of pneumatic, hydraulic, and cryogenic applications to provide protection from over-pressure in steam, gas, air and liquid lines. The working involves letting off the steam when safe pressure level is exceeded and then closing of the valve after the pressure level drops to the preset level; Back pressure regulating valve helps to maintain upstream pressure at the desired level by allowing excess upstream pressure to flow downstream. These self-operating valves are installed to prevent over pressurization of the system.

Application of Pressure Relief Valve