dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

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Polypac PTFE Backup Rings — Durable Low-Friction Seal Solution

Polypac PTFE Backup Rings provide reliable sealing support for hydraulic and static applications. Made from high-performance PTFE compounds, they reduce extrusion, resist chemicals and wear, and can be custom-sized for special conditions.

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Product Description

Product Overview

Polypac PTFE Backup Rings are engineered to protect O-rings and seal faces in demanding hydraulic and static applications. Made from high-quality PTFE and filled PTFE blends, these backup rings prevent extrusion, lower friction, and extend seal life—especially under high pressure and challenging environments.

Key Features

High wear and extrusion resistance to protect primary seals
Low friction surface for smooth operation and reduced heat
Chemical and temperature resistance suitable for a wide range of fluids
Available in virgin PTFE and filled PTFE varieties (bronze, carbon, graphite, MoS₂, glass)
Precision dimensions for reliable fit and repeatable performance

Benefits

Using Polypac PTFE Backup Rings means fewer seal failures, less downtime, and lower maintenance costs. Their low-friction nature improves efficiency, while excellent chemical compatibility ensures long-term stability in oils, fuels, and aggressive media. Custom sizes and tight tolerances make them ideal for retrofit and OEM projects.

Why Choose Polypac

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier with a 10,000+ m² facility and 8,000 m² production space. Since 2008, we have specialized in filled PTFE seals and expanded to O-rings in NBR, FKM, silicone, EPDM, and FFKM. Our advanced production and testing equipment, plus partnerships with universities and research institutes, ensure reliable products and continuous innovation.

Applications & Materials

Ideal for hydraulic cylinders, valves, pumps, and static sealing faces. Choose from virgin PTFE for excellent chemical resistance or filled PTFE for improved wear and load-bearing capacity. We recommend matching backup rings to your O-ring material for optimal performance.

Ordering & Customization

Polypac offers quick quotes, custom sizes, and small-to-large production runs. Contact our technical team with working conditions and dimensions—we’ll recommend the best PTFE blend and tolerances for your application.

Contact Polypac today for high-performance PTFE Backup Rings that reduce extrusion, extend seal life, and keep your systems running reliably.

Detailed display

Question you may concern

When should I use a spring-energized seal instead of a standard elastomeric seal?

Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.

Why did my O-ring fail prematurely?

Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.

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.

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.

If you have another questions, please feel free to contact us.

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PRODUCTS

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

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