safety valve
Sign in to savevalve that acts as a fail-safe
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Encyclopedic overview
An oxygen safety relief valve DN250-safety valves
A safety valve is a valve that acts as a fail-safe. An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance from a boiler, pressure vessel, or other system, when the pressure or temperature exceeds preset limits. Pilot-operated relief valves are a specialized type of pressure safety valve. A leak tight, lower cost, single emergency use option would be a rupture disk.
Excerpted from Wikipedia’s “safety valve” article, available under the CC BY-SA 4.0 licence.