Heavy Duty Loaded Rod U-Cup Seal With Active Backup Ring

Series 163: Heavy Duty Loaded Rod U-Cup Seal With Active Backup Ring

The 163 series is a heavy duty polyurethane seal with multiple features that include a double-lipped U-cup design, an internal O-Ring energizer and a reinforced backup ring on the heel. This seal is ideal for applications where high-pressure spikes are like to be encountered. This seal also features additional sealing contact points in the groove.



High-pressure capability and wide temperature range

Excellent fluid compatibility including water-based fluids (H-PU)

Exceptional abrasion resistance


The 163 series rod seal is typically used in heavy-duty applications, where pressure spike and large extrusion gaps exist.

Typical applications include:

  • Mining
  • Mobile Hydraulics
  • Hydraulic Cylinder Rebuild
  • Agricultural Hydraulics
  • Construction Equipment

The 163 series rod seal features high-grade polyurethane. Standard materials are MP03 machined H-PU, NBR O-ring and polyacetal backup ring. To suit a variety of applications, the series is also available in NBR, H-NBR, EPDM and high temperature-resistant FPM.

Material Code
Polyurethane H-PU / NBR / POM MP62
Polyurethane TPU / NBR / Polyamide MP63

hydraulic oil -20…+115 -5…+240
water oil emulsions (HFA) +5…+55 +40…+130
water-glycol fl uids (HFC) -20…+55 -5….+130
polyol esters (HFD) - -
water +5…+55 +40…+130
Speed 0.5 m/s (1.6 ft/sec)
Pressure 690 bar (10000 psi)

Note: for other materials or fluids please contact our engineering department.