Freudenberg aims to replace the O-ring with a T-ring

ERJ staff report (DS)

Weinheim, Germany -- Freudenberg has developed a new seal for pneumatic cylinders called the T-ring, which could replace the O-ring seal.

The company said it has applied for a patent on the Simrit T-ring as a piston seal. The seal, it said, optimises load-bearing capacities in terms of friction, wear, mounting reliability, sealing effect, and the bridging of tolerances.

The single-piece, symmetrical piston seal, which will be presented for the first time at the 2011 Hanover Trade Fair, has both a radial and an axial component (see above.) The dynamic sealing function is assumed by a sealing area with a large radius. The radial force required for this is built up by the geometric interference alone. By decoupling the dynamic (1) and static (2) sealing functions, Freudenberg said the new design eliminates the radial compression of the seal cross section, thereby creating ideal preconditions for the minimisation of friction and wear and the elimination of stick-slip effects.

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Press release from Freudenberg