Polypac Backup Rings — Reliable Anti-Extrusion Seal Support

Polypac Backup Rings – Strong Support for Seals

Polypac Backup Rings are designed to prevent O-ring and seal extrusion in high-pressure and high-temperature applications. Built from advanced PTFE compounds and specialty materials, our backup rings deliver consistent performance, longer service life, and reliable sealing under tough working conditions.

Why Choose Polypac Backup Rings?

• Anti-extrusion protection: Stops seal material from being forced into gaps under pressure.
• Durable materials: Available in filled PTFE variants (bronze, carbon, graphite, MoS2, glass) and engineered polymers for varied environments.
• Wide compatibility: Works with NBR, FKM, silicone, EPDM, FFKM O-rings and custom rubber seals.
• Custom solutions: Tailored designs for unique housings and special working conditions.

Applications

Commonly used in hydraulic cylinders, valves, pumps, compressors, and high-pressure fittings, Polypac Backup Rings are ideal where seal extrusion, wear, or chemical exposure is a concern. They perform well in oil, hydraulic fluids, and many industrial media.

Our Manufacturing Strength and Quality

Polypac is a scientific and technical hydraulic seal manufacturer with over a decade of experience. Our custom rubber ring and O-ring factory covers more than 10,000 square meters, including 8,000 square meters of production space. We use advanced production and testing equipment and work closely with universities and research institutions to develop reliable sealing materials and designs.

Trusted Materials and Testing

Starting in 2008 with filled PTFE seals, Polypac now offers a full range of backup ring materials and O-rings in NBR, FKM, silicone, EPDM, and FFKM. Every backup ring undergoes strict dimensional and material testing to ensure consistent performance and long-term reliability.

Buy with Confidence

Choosing Polypac Backup Rings means choosing tested materials, precise manufacturing, and customized support for your seals. Whether you need standard sizes or custom parts for special equipment, our team can help specify the right solution to extend seal life and reduce maintenance costs.