PTFE Seal

Freudenberg-NOK introduces its friction-optimized seal featuring a combination of elastomer and polytetrafluoroethylene.

May 9, 2013

Freudenberg Sealing Technologies - NOK

Fruedenbergnok Pfteseal 10939626

Freudenberg-NOK Sealing Technologies Simrit has developed the PTFE seal, a friction optimized seal made from a combination of elastomer/polytetrafluoroethylene (PTFE).

Fits in existing standard sealing grooves
Provides more consistent performance
PTFE system offers low breakaway force, improved durability and temperature resistance for dry running piston type systems such as air brakes or pneumatics
Coefficient of friction is around 0.1 to 0.2 in seal's natural state
Reduces overall friction by two times at zero pressure and three times at 10 bar
Provides very low initial breakaway torque and friction, as well as high-temperature consistency
Features comparable installation to that of an o-ring, including direction independence, “twist-safe” performance and gap extrusion resistance
Offers increased design freedom, as a variance of geometries and diameters are available to minimize friction differences even when utilizing all production tolerances
PTFE layer is bonded to an elastomer, which then can be bonded to a solid carrier if required, minimizing friction and improving overall comfort at gear changing in automatic transmissions
Eliminates stick-slip, the effects of rubber aging, the influence of temperature and the effect of hysteresis

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