Freudenberg develops low-energy seal design

ERJ staff report (DS)

Weinheim, Germany — Freudenberg claims to have developed a new style of reciprocating seal, which delivers effective sealing with minimal energy loss, and significantly reduced stick-slip response. The seal combines an elastomer element with a surface coating of PTFE foil.

The design came after a comprehensive benchmarking of existing seal designs. Simrit compared the various different types of piston seal on the market: bonded piston seals, O-rings, D-rings, a combination of O-ring and PTFE sliding ring, and channel gaskets. Criteria for the benchmark…

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