O-ring seal RDA series

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The Hunger RDA rotary seal can be used as a sealing element for rotating machine parts. It is mainly used in rotary feed units for separation of oil or other fluids at different pressures and can be subjected to pressure on both sides. Since the seal requires only a small installation space, the external dimensions of rotary feed units can be kept to a minimum. The RDA is suitable for relatively high pressures with low peripheral speeds. The seal consists of 4 parts, an elastic element held by L-rings on which the sealing thrust ring lies. The L-rings on both sides protect the entire seal against movement in the seal groove. With working pressures above 300 bar and a surface sliding speed above 0.1 m/second, the working temperature must not exceed 70°C (158°F). Due to its greater static contact surface, the RDI seal is preferred to the RDA. Depending on the specifications and operating conditions it is recommended to have the running surface hardened to approx. 56 HRC or hard chromium plated.