Hydraulic Piston Seal Solutions by Polypac

Hydraulic Piston Seal Solutions by Polypac

High Quality piston sealing for demanding hydraulics

Polypac specializes in hydraulic piston seal production and customized sealing solutions. Our hydraulic piston seal range is engineered for pressure stability, low friction and long service life in mobile and industrial hydraulic cylinders. Backed by more than a decade of material science expertise, Polypac delivers reliable sealing performance across a wide range of operating temperatures and pressures.

Materials engineered for performance

We design piston seals using filled PTFE formulations (bronze, carbon, graphite, MoS₂, glass) and high-performance elastomers including NBR, FKM, silicone, EPDM and FFKM. This material diversity lets us optimize wear resistance, extrusion resistance and chemical compatibility for each hydraulic piston seal application, reducing downtime and maintenance costs.

Custom manufacturing and advanced testing

Polypac's custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space and industry-leading equipment. Our in-house testing labs and process controls ensure each hydraulic piston seal meets dimensional tolerances, surface finish and endurance standards. We collaborate with universities and research institutes to continuously refine sealing compounds and manufacturing techniques.

Design flexibility and application fit

Whether you need standard piston seals or bespoke geometries for extreme environments, Polypac offers tailored designs for high-pressure cylinders, servo valves, telescopic booms and subsea systems. Our engineers optimize cross-sections, lip profiles and back-up configurations to maximize sealing life and system efficiency.

Why choose Polypac

As one of China’s leading seal manufacturers since 2008, Polypac combines scientific R&D with large-scale production capacity. We offer quick prototyping, consistent quality, and global supply capabilities. Choosing Polypac means partnering with a supplier focused on material innovation, traceable testing and responsive custom engineering for every hydraulic piston seal requirement.

Get started

Contact Polypac to specify material, size and working-condition requirements for your hydraulic piston seal. Our team will provide technical recommendations, samples and production timelines to help you lower lifecycle cost and improve hydraulic reliability.