Series AP01: Piston U-Cup Seal

The AP01 Series Piston U seal is used in a variety of standard-duty applications. Its asymmetrical design ensures that the seal lip forces are optimized for every cross section and diameter.

AP01 Piston U seal includes models UNP, ODI, 606, OUIS, PUA, etc.


The AP01 Series Piston U Seal is one of the most versatile seals typically used in moderate to high-pressure applications.  Standard materials are machined H-PU, available up to 2100 mm in diameter, and injection-molded TPU.

To suit a variety of applications, AP01 is also available in NBR, H-NBR, EPDM and high temperature-resistant FPM or Viton.

Typical applications include:

  • Mobile Hydraulics

  • Hydraulic Cylinder Rebuild

  • Agricultural Hydraulics

  • Construction Equipment

  • Hydraulic Presses

  • Injection Molding Machines


High pressure capability and wide temperature range

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

Exceptional abrasion resistance

Highly extrusion resistant

Available in diameters up to 2000mm