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Polypac With Anti-Extrusion Rings — Reliable Hydraulic Seals

Polypac anti-extrusion rings protect hydraulic seals from extrusion and leakage. Custom materials, advanced production, and rigorous testing ensure long-lasting performance in demanding environments.

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Product Description

Product Overview

Polypac With Anti-Extrusion Rings are engineered backup components designed to prevent seal extrusion and improve the life of hydraulic O-rings and rubber rings. Built for high-pressure and dynamic applications, these rings fit seamlessly into standard seal grooves and work with materials like NBR, FKM, EPDM, silicone and FFKM.

What makes them special?

Anti-extrusion rings offer a simple but effective way to stop soft seals from being forced into gaps under pressure. Our design focuses on a tight fit, low friction and strong support — so seals last longer, leak less and reduce maintenance downtime.

Key Advantages

Enhanced extrusion resistance: protects seals in high-pressure systems.
Material flexibility: compatible with PTFE-filled options and common elastomers.
Custom solutions: available in various sizes, shapes and compounds to meet special working conditions.
Industry-grade production: made in our 10,000+ m² facility with advanced testing equipment.
Proven quality: long-term collaborations with universities and research institutes ensure reliable performance.

Applications

Ideal for hydraulic cylinders, valves, pumps and any equipment where seals face high pressure, shock loads or gap extrusion. Common industries include construction machinery, oil & gas, automotive and industrial hydraulics.

Why Choose Polypac?

Founded in 2008, Polypac combines decades of seal expertise with modern manufacturing. From our early work on filled PTFE to our wide range of O-ring materials, we offer tailored anti-extrusion rings that balance cost and performance. Our large factory, skilled R&D team and strict quality control mean you get durable parts fast and with consistent quality.

Choose Polypac With Anti-Extrusion Rings to reduce leaks, extend seal life and lower maintenance costs. Contact us for samples or custom designs for your specific operating conditions.

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FAQ

What is the difference between a static seal and a dynamic seal?

A Static Seal is used between two surfaces that do not move relative to each other (e.g., pipe flanges, end caps). O-rings and gaskets are common static seals. A Dynamic Seal is used between surfaces that do move (e.g., piston and cylinder, rotating shaft). Rod seals, piston seals, and rotary shaft seals are designed for this purpose.

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 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.

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.

If you have any questions about our goods or services, 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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