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Allows O-Rings to be utilized in higher pressure applications, where larger extrusion gaps are required and where there are reciprocating or rotating movements
Compatible with virtually all media and gases
Wide range of geometries to meet the needs of all applications
Sizes to meet all standards
Non-standard sizes also available
Back-up Rings are protective and supporting elements with no sealing function. Made from extrusion-resistant materials such as Turcon®, Zurcon®, Hi-Mod® or PEEK they usually have a rectangular cross section and are installed in a groove with an elastomer O-Ring. Due to their tight fit in the housing, Back-up Rings prevent extrusion of the pressurized elastomer sealing element into the clearance or extrusion gap.
Using Back-up Rings allows O-Rings to be utilized in higher pressure applications, where larger extrusion gaps are required and where there are reciprocating or rotating movements. They also compensate for large temperature fluctuations.