Registration E-CATALOG Contact Sign into newsletter Brochures


Product group: Rod seal
Design: NI asymmetrical u-ring with inner main sealing lip
Profile no.: 72
Specification: E suitable for one-sided pressure load
Model: STI inner back-up ring
Seal material: TPU
Back-up ring: POM

Operational application limits
Pressure (MPa): ≤ 40
Temperature (°C): -30 to +100
Running speed (m/s): ≤ 0.5

Hydraulic oils acc. to DIN 51524 Part 1 – 3, lubricating oils, mineral oil based lubricating greases, highly non-flammable hydraulic fluids HFA, HFB, HFC acc. to VDMA 24317

The S72 u-ring consists of a TPU seal body and a POM back-up ring. The S72 u-ring is a single-acting rod seal with an asymmetrical design. The semi-active back-up ring on the inner diameter prevents gap extrusion on the side facing away from the pressure.

U-rings can be installed in both solid and split housings. Please note that for a solid housing application a minimum width is necessary and suitable installation tools may be required.

The S72 is used in combination with other piston rod seals. Seals made of TPU are very robust and are exceptionally well-suited for applications in mobile hydraulics and earth moving equipment.