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Product group: Piston seal
Design: NA asymmetrical u-ring with outer main sealing lip
Profile no.: 44
Specification: E suitable for one-sided pressure load
Seal material: PTFE 00 9808
Spring material: Stainless steel 1.4310 (DIN EN 10088-1)

Operational application limits
Pressure (MPa): ≤ 35
Temperature (°C): -150 to +250
Running speed (m/s): ≤ 15

Hydraulic oils of all types, hot air, water steam. PTFE is resistant to most chemicals.

The u-ring KNA44 is a single-acting PTFE seal in the form of an outer sealing u-ring. The steel V-spring activates the sealing lip permanently so that even in a non-pressurized state, good sealing performance is guaranteed.

We recommend axially accessible installation housings. For a limited size range, semi-open installation housings are also possible.

Due to the asymmetrical sealing lip, the sealing is optimised, the friction behaviour is improved and the service life considerably lengthened. The standard KNA 44 is provided in the adjoining material combination. For special applications, additional PTFE compounds and V-springs made of Elgiloy® are available.

Housing: Click here