anti extrusion ring
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Back Up Ring
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. Back up ring including BRT, N4W. Hydraulic cylinder seals prevent the leakage of working medium (internal and external leakage) and prevent foreign objects (such as air, dust and water) from entering the hydraulic components and hydraulic system.
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