Reinforced Symmetrical Rod Seal U-Cup

Series 133: Reinforced Symmetrical Rod Seal U-Cup

The 133 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 pressure spikes and large extrusion gaps common in mining applications.



Symmetrical design for optimal sealing performance

Internal O-Ring works more efficiently at varying pressures

Double-lip design increases efficiency and performance

Highly extrusion resistant in large gap conditions

Easy to install


The 133 Series rod seal is typically used in heavy-duty applications, where pressure spikes and large extrusion gaps exist.

Typical applications include:

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

The 133 Series rod seal features high-grade polyurethane. Standard materials are MP03 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 MP62
Polyurethane TPU MP63
Temperature MP03

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)