Watson McDaniel Company Safety Relief Valve WSVI-19S-20S-M

The WSVI Safety Valves are used for over-pressure protection on unfired pressure vessels in saturated steam systems. As safety valves open on a non-compressible fluid application, the disc lifts directly proportional to the increase in system pressure over the valve set point. Safety valves not only provide over pressure protection resulting from thermal expansion of liquids, but will respond with a rapid full opening “pop” action on systems which contain or generate steam, air or gas.