ST08 Back-Up Ring

Housing Details

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Description

back-up rings have no intended sealing function. instead, as their name indicates, they are protective and supporting elements made from extrusion-resistant materials which generally have a rectangular cross section. they are installed in a groove together with an elastomeric sealing element preferably with a corresponding o-ring in static applications. due to the tight fit of the back-up ring in the housing, they prevent extrusion of the pressurised elastomeric sealing element into the sealing gap common inactive backup ring, mainly used with o-ring to avoid gap extrusion.