for static applications as an O-ring replacement to avoid drilling in the housing, simple installation and higher extrusion resistance.

category of profile

machined or molded/standard/trade product.


compared with the O-Ring / Back-up Ring combination, the Dualseal offers the following advantages:

  • high resistance to twisting
  • easy assembly
  • long service life
  • high extrusion resistance of the material


the dualseal allows general use in hydraulic cylinders e.g.

  • fork lifts
  • mobile hydraulics
  • industrial hydraulics
  • machine tools
  • injection moulding machines
  • hydraulic presses
  • cartridge valves

operating parameters & materials

material temperature max. surface speed max. pressure 1
PU -30 °C … +110  °C 400 bar (40 MPa)
 HPU -20 °C … +110  °C 400 bar (40 MPa)
LTPU -50 °C … +110  °C 400 bar (40 MPa)
SLPU -20 °C … +110  °C 400 bar (40 MPa)

he stated operation conditions represent general indications. it is recommended not to use all maximum values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap

surface quality

type of load surface roughness

Rtmax (μm)

Rx (μm)

Ra (μm)

radial – static mating surface ≤ 10,0 ≤ 6,3 ≤ 1,6
bottom of groove ≤ 10,0 ≤ 6,3 ≤ 3,2

tolerance recommendation

seal housing tolerances
Ød g6

preferred sealing gap

due to the high extrusion resistance of the seal a radial sealing gap (S) of 0.2 mm can be realised. in case of low temperature applications devia- tions of the gland to the bore and rod shall be avoided.

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see jet seal pars catalog…

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.