Engineered for demanding hydraulic applications, our Polyurethane Hydraulic U-Seal delivers reliable, long-service sealing performance in both piston and rod configurations. The U-profile lip geometry creates a self-energizing seal that tightens under system pressure, minimizing bypass and maintaining consistent sealing force across the full pressure range.
Key Benefits
High abrasion resistance — polyurethane compound withstands particulate contamination and side-load wear far better than standard rubber compounds
Wide pressure range — suitable for low-pressure static conditions through high-cycle dynamic hydraulic systems
Low friction profile — reduces stick-slip and heat generation, extending cylinder and rod service life
Excellent extrusion resistance — maintains dimensional stability under pressure spikes without requiring a back-up ring in most standard clearance applications
Chemical compatibility — compatible with petroleum-based hydraulic fluids, water-glycol fluids, and most synthetic hydraulic oils
Typical Applications
Hydraulic cylinders (piston and rod sealing)
Linear actuators
Mobile hydraulic equipment
Industrial presses and clamping systems
Construction and agricultural machinery
Material Properties
Material: Polyurethane (PU)
Hardness: 90–95 Shore A (typical)
Temperature range: -40°F to +212°F (-40°C to +100°C)
Operating pressure: Up to 5,000 PSI (345 bar) depending on clearance and configuration
Available in standard AS568 and metric bore sizes. Custom dimensions available upon request. Contact us for volume pricing and OEM cross-reference matching.
