PTFE Seal

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