Polypac POM Backup Rings — Reliable High-Pressure Seal Support

Overview

Polypac POM Backup Rings are engineered to protect elastomer seals from extrusion and deformation under high pressure and severe conditions. Made from high-performance POM (acetal) material, these backup rings offer excellent stiffness, low friction and long-term dimensional stability—ideal for hydraulic cylinders, valves, pumps and heavy machinery.

Key Benefits

Superior Extrusion Resistance

POM backup rings act as a rigid barrier behind O-rings and other soft seals to prevent extrusion when systems run at high pressure. This reduces seal failure and extends service life.

Low Friction & Smooth Operation

The low coefficient of friction of POM helps reduce wear on mating surfaces and supports smoother movement in dynamic assemblies, improving efficiency and reducing maintenance.

Dimensional Stability & Chemical Resistance

POM retains shape and performance across a wide temperature range and resists common hydraulic fluids. It maintains tight tolerances to ensure reliable sealing under repeated cycles.

Applications

Common uses include hydraulic cylinders, directional valves, pumps, actuators, automotive components and industrial equipment. Polypac POM backup rings are suitable for both static and dynamic sealing scenarios, particularly where elastomer extrusion is a risk.

Why Choose Polypac

Polypac is a scientific and technical hydraulic seal manufacturer with a custom rubber ring and O-ring factory spanning over 10,000 m². Founded in 2008, we began with filled PTFE seals and expanded to a wide range of elastomers. Our advanced production and testing equipment, plus long-term partnerships with universities and research institutes, ensure consistent quality and rapid customization.

Custom Options & Quality Assurance

We offer custom sizes, tight tolerances and quick-turn prototypes. All products undergo strict inspection and performance testing to meet demanding working conditions. Whether you need a standard backup ring or a tailored solution, Polypac delivers durable, cost-effective sealing support.

Contact Polypac to find the right POM backup ring for your application and reduce seal downtime with reliable, precision-engineered components.