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Product group: Piston seal
Design: TPU seal with an o-ring energising element
Profile no.: 70
Specification: Z suitable for two-sided pressure load
Seal material: TPU 95
O-Ring material: NBR 70

Operational application limits
Pressure (MPa): ≤25
Temperature (°C): -30 to +100
Running speed (m/s): ≤0,5

Hydraulic oils in accordance with DIN 51524 (Part 1 – 3), flame resistant hydraulic fluids (HFA, HFB, HFC), lubricating oils and greases based on petroleum oils

The double-acting K70 is composed of an extrusion-resistant sealing element made of blue TPU 95, which is prestressed by an O-ring made of NBR 70. This results in an exceptionally good sealing function with heavy loads and good static sealing performance is significantly better due to the TPU material than with comparable PTFE seals.

This seal can generally be installed in cut grooves without calibration which makes the K70 design very easy to install.

The K70 design combines the robustness of TPU with the advantage of very small, installation friendly housings. For special applications, the hardness of the o-ring or the material can be changed. The seal is used particularly in agricultural machines, mobile hydraulic platforms, ground conveyors and standard cylinders.