U-Cup Seal Kit — Polypac Hydraulic Sealing Solutions

U-Cup Seal Kit — Reliable Hydraulic Sealing by Polypac

Polypac designs and manufactures High Quality U-Cup Seal Kits for hydraulic cylinders and reciprocating applications. Our kits combine low friction, excellent extrusion resistance and long service life. Built from advanced PTFE-filled materials and high-performance elastomers, the U-Cup Seal Kit supports demanding pressures, wide temperature ranges and varied media.

Applications & Performance

The U-Cup Seal Kit is ideal for hydraulic pistons and rods across construction, mobile hydraulics, industrial presses and marine equipment. With optimized lip geometry, the kit minimizes leakage, reduces stick-slip and maintains sealing integrity under high pressure and frequent cycling.

Materials & Manufacturing Excellence

Polypac produces U-Cup Seal Kits using bronze-, carbon-, MoS₂- and glass-filled PTFE as well as NBR, FKM, EPDM, silicone and FFKM elastomers. Our factory spans over 10,000 m² with 8,000 m² of production space and advanced molding and testing equipment, ensuring consistent tolerances and material traceability for every U-Cup Seal Kit.

Customization & Special Conditions

Every U-Cup Seal Kit can be tailored for temperature extremes, aggressive fluids or space-constrained designs. We collaborate with universities and research institutes to develop compound formulations and custom housings—delivering bespoke kits for unique operating conditions.

Quality Assurance & Testing

Polypac implements rigorous dimensional inspection, material analysis and functional testing for each U-Cup Seal Kit. Our in-house labs validate wear, extrusion resistance and friction coefficients so that you receive reliable kits ready for OEM production or aftermarket replacement.

Benefits of Choosing Polypac

Choosing a Polypac U-Cup Seal Kit means predictable performance, scalable production and responsive technical support. Our deep expertise in filled PTFE and elastomer seals ensures extended service life, reduced maintenance costs and improved system efficiency.

Ordering & Support

Polypac offers flexible MOQ, fast lead times and comprehensive technical documentation for each U-Cup Seal Kit. Contact our engineering team for material selection, dimensional drawings or rapid prototyping to integrate the optimal seal kit into your application.