A rupture isk 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, 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.