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The Double-Disc Opti-Gard pressure-relief assembly was designed to prevent environmental contamination in severe process conditions. It comprises primary and secondary bursting discs, plus a pressure gauge or switch to monitor the space between the discs. In the event of chemicalattack causing pinholing of the primary disc, the back-up prevents pollution of the environment, while the intermediate pressure sensor warns maintenance teams of the need to repair the compromised primary disc. The assembly negates the risk of separate holders being incorrectlyinstalled.
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