Safety valve

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.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

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