A rupture disc, also known as a bursting disc, is a non-reclosing safety device that protects against either over pressure or vacuum conditions. Once a rupture disc has split then it has to be replaced. They can be used on their own but are more commonly used in conjunction with a Safety valve either as a secondary backup device or to iscolate the safety valve from the process medium when the medium is particularly hostile.
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Rupture Disc / Bursting Disc
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