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Polypac O-Ring Backup Rings — Reliable High-Performance Sealing

O-Ring Backup Rings by Polypac — Engineered for Enduring Seals

High Quality Materials & Compatibility

Polypac O-Ring Backup Rings are produced from specially selected materials—including filled PTFE variants and elastomers such as NBR, FKM, silicone, EPDM and FFKM—designed to complement O-rings and prevent extrusion under pressure. Whether the application demands chemical resistance, wide temperature range, or low friction, our backup rings are matched to the O-Ring compound to extend seal life and maintain system integrity.

Precision Manufacturing & Capacity

Manufactured in our 10,000+ m² facility with 8,000 m² of dedicated factory space, Polypac uses advanced production and testing equipment to deliver tight tolerances and consistent geometry. Each backup ring undergoes dimensional and performance checks so your seals fit precisely, minimize installation errors, and reduce downtime in hydraulic and rotary systems.

Custom Solutions for Special Conditions

Polypac specializes in customized O-Ring Backup Rings for unique working conditions—high pressure, pulsation, elevated temperatures, aggressive media, or limited gland space. Our engineers optimize ring profile, material blend, and surface finish to meet application-specific requirements, including unconventional sizes and compound formulations.

Applications Across Industries

Our O-Ring Backup Rings are widely used in hydraulic cylinders, pumps, valves, subsea equipment, automotive actuators, oil & gas systems, and industrial machinery. Designed to resist extrusion, reduce wear on mating parts, and maintain sealing performance under dynamic cycles, Polypac backup rings help systems run cleaner and longer.

Quality Assurance & Research-Driven Development

Founded in 2008 and continually expanding our material and process expertise, Polypac collaborates with universities and research institutions to innovate sealing solutions. Rigorous testing protocols and material science research ensure each O-Ring Backup Ring meets industry expectations for durability, chemical compatibility, and operational safety.

Why Choose Polypac

Choose Polypac for award-winning seal design, fast customization, and reliable supply. Our combination of advanced materials, production scale, and R&D partnerships delivers backup rings that protect O-rings and safeguard your equipment. Contact Polypac to specify O-Ring Backup Rings tailored to your most demanding applications.

O-Ring Backup Rings Display

FAQ:

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

What is the purpose of the metal spring in a rotary shaft seal?

The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.

What is the difference between NBR and FKM materials?

NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.

How can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

Table of Contents

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O-Ring Backup Rings by Polypac — Engineered for Enduring Seals
High Quality Materials & Compatibility
Precision Manufacturing & Capacity
Custom Solutions for Special Conditions
Applications Across Industries
Quality Assurance & Research-Driven Development
Why Choose Polypac
O-Ring Backup Rings Display

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