Rupture disc

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A rupture disk or bursting disc is a pressure relief device that protects a vessel or system from overpressurization. Rupture discs have a one-time-use membrane that fails at a fixed pressure, either positive or vacuum. The membrane is usually a thin metal foil, ^[1] but nearly any material can be used to suit a particular application. Rupture discs provide fast response to an increase in system pressure but once the membrane has failed it will not reseal.

Rupture discs are commonly used in aerospace, aviation, defense, nuclear and oilfield applications. They are often used as a backup device for a conventional safety valve; if the pressure increases and the safety valves fails to operate (or can't relieve enough pressure fast enough), the rupture disk will operate.

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