Caleffi 1/2" 3 Bar Safety Relief Valve f x f 

The Altecnic series 311 and 312 safety relief valves are used in domestic

hot water systems to protect the hot water cylinder and in heating

systems to protect boiler and other components.

The valve is selected for the required set pressure. As the pressure rises,

when the discharge pressure is reached the valve opens and discharges

to atmosphere, preventing the pressure within the system reaching levels

which would be dangerous for the boiler, hot water storage cylinder and

any personnel in the adjacent vicinity.