Safety valve
Overview
Valve
A valve is a device that regulates, directs or controls the flow of a fluid by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but are usually discussed as a separate category...
mechanism for the automatic release of a substance from a boiler
Boiler
A boiler is a closed vessel in which water or other fluid is heated. The heated or vaporized fluid exits the boiler for use in various processes or heating applications.-Materials:...
, pressure vessel
Pressure vessel
A pressure vessel is a closed container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.The pressure differential is dangerous and many fatal accidents have occurred in the history of their development and operation. Consequently, their design,...
, or other system
System
System is a set of interacting or interdependent components forming an integrated whole....
when the pressure or temperature exceeds preset limits.
It is part of a bigger set of pressure safety valves (PSV) or pressure relief valves (PRV). The other parts of the set are relief valve
Relief valve
The relief valve is a type of valve used to control or limit the pressure in a system or vessel which can build up by a process upset, instrument or equipment failure, or fire....
s, safety relief valves, pilot-operated relief valve
Pilot-operated relief valve
Like other pressure relief valves , pilot operated relief valves are used for emergency relief during overpressure events . The distinction between PORV and conventional PRV is that pilot valves use system pressure to seal the valve...
s, low pressure safety valves, and vacuum pressure safety valves.
Safety valves were first used on steam boilers during the industrial revolution.
Discussions
