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What is the shelf life of magnetic and spring-loaded seals?

April 26, 2017life MAGNETIC seals shelf spring-loaded

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What is the shelf life of magnetic and spring-loaded seals?

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The shelf life for either the MAGSEAL or the MACHSEAL is theoretically unlimited. However, we recommend that any MAGSEAL or MACHSEAL that is over five (5) years old should have the carbon seal ring surface flatness verified to be within our requirement of two (2) helium light bands, .0000232 in. [0.000589 mm] prior to use. If this surface flatness is beyond our requirement, then it should be returned to Magnetic Seal Corp to be relapped to the required flatness.