U-Seals – Heavy Duty (HRDA / Triple Lip)

Forge Industrial Supplies stocks heavy-duty U-seals, also known as HRDA or triple-lip U-seals, engineered for high-pressure, high-load rod applications. The reinforced profile and multiple sealing lips significantly improve extrusion resistance, stability, and service life in demanding environments.

These seals are intended for applications where standard U-seals are insufficient due to pressure spikes, large clearances, or severe side loading.

Technical Specifications

• Application: Heavy-duty rod sealing

• Pressure (max): up to 400 bar (with correct tolerances and support)

• Temperature range:

  • PU: –40 °C to +135 °C

• Sliding speed (max): up to 1.0 m/s

• Media: Hydraulic oils and mineral-based fluids

Materials

• High-performance Polyurethane (PU)