Oseco's PCR is a reverse buckling rupture disc designed for high cycling or high vacuum gas and vapor applications. This disc is commonly used in SF6 switchgear applications.
PCR Flyer / PCR Installation Guide
High voltage transformers often utilize a rupture disc to protect the tank on high voltage transformers.
Special high performance rupture discs are used to protect high voltage SF6 gas circuit breakers. The rupture disc design is normally customized for the breaker.