Backup Rings & High-Performance Seal Solutions by Polypac

Backup Rings — Reliable Support for Critical Sealing Systems

Why Backup Rings Matter

Backup Rings are essential companions to elastomeric seals in high-pressure and extrusion-prone environments. They prevent O-ring extrusion, extend seal life, and preserve system integrity in hydraulic cylinders, valves, pumps, and rotating equipment. Polypac’s Backup Rings are engineered to deliver dimensional stability and low-friction performance under repeated cycling.

Materials & Customization

We manufacture Backup Rings from a wide range of thermoplastics and filled PTFE blends optimized for specific service conditions. Starting with our roots in filled PTFE (bronze, carbon, graphite, MoS₂, glass), Polypac now supplies rings compatible with common elastomers including NBR, FKM, EPDM, silicone and high-performance FFKM. Custom formulations and tight tolerances are available for high-temperature, chemical-exposure, or abrasive media applications.

Manufacturing Capabilities & Quality

Polypac’s custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of factory space and industry-leading production and testing equipment. Established in 2008, we combine advanced machining, molding and inspection systems with R&D partnerships across universities and research institutions. Each Backup Ring undergoes dimensional, hardness and material verification to meet demanding hydraulic specifications.

Applications & Performance Benefits

Polypac Backup Rings are suited for high-pressure hydraulic cylinders, subsea actuators, mobile equipment, and industrial valves. Benefits include improved extrusion resistance, extended seal life, reduced maintenance intervals, and stable performance across wide temperature ranges. Their compatibility with a broad spectrum of elastomers makes them ideal for retrofits and OEM programs.

Why Choose Polypac

As a scientific and technical hydraulic seal manufacturer and oil seal supplier, Polypac combines decades of PTFE expertise with modern elastomer technologies. Our vertically integrated production, rigorous quality control and custom development capabilities ensure that every Backup Ring we deliver supports optimal sealing performance under special working conditions. Partner with Polypac for engineered Backup Rings that protect your seals and your equipment.