Pressure relief valves are designed to provide protection from over-pressure in steam, gas, air, and liquid lines. Relief valves and back pressure regulators are the same device, only differing in ...

Bolt Flange The valve has a bolt flange(s) for inlet or outlet connection. Clamp Flange The valve has a clamp flange(s) for inlet or outlet connection. Union The valve has a union connection for inlet ...

To distinguish between the two, think of a pressure-relief valve as a safety device that — when the pressure starts to build — opens and allows the water to escape through a designated outside channel ...

Sometimes, leaks can occur due to excessive pressure buildup inside the tank. Check the temperature and pressure settings on ...