Heavy-Duty, Three-Piece Piston Seal

Series 232: Heavy-Duty, Three-Piece Piston Seal

The 232 Series is a robust three-piece piston seal that consists of a profiled H-NBR seal ring and two active anti-extrusion backup rings. It is designed for double-acting cylinders in heavy-duty applications subject to severe pressure spikes coupled with high running clearance.



Long service life under the harshest conditions

Compatible with water-base fluids (H-PU)

Optimized for high running clearance

Easy installation


The 232 Serie heavy-duty, three-piece piston seal is ideal in heavy duty sealing applications where pressure spiking can occur.

Typical applications include:

  • Mining
  • Heavy duty clamp cylinders
  • Specialty high-pressure cylinders
  • Hydraulic rams
  • Various advancing and secondary cylinders

The 232 Series heavy-duty,  three-piece piston seal features a robust profiled seal ring available in abrasion resistant H-NBR and two backup rings in high-strength thermoplastic.

Material Code
Polyurethane H-NBR / POM MN03
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 1380 bar (20000 psi)

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