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Polypac Long Life Cylinder Seal

Polypac Long Life Cylinder Seal offers extended service life, low friction, and broad chemical and temperature resistance. Custom sizes and materials with advanced testing and factory support for reliable hydraulic performance.

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Product Details

Polypac Long Life Cylinder Seal — Durable, Reliable, Customizable

Polypac Long Life Cylinder Seal is designed for demanding hydraulic applications where durability and consistent performance matter. Built from advanced sealing materials and backed by rigorous testing, this seal minimizes downtime and maintenance costs while delivering smooth operation.

Key Benefits

Extended service life — engineered to resist wear and extrusion under high pressure.
Low friction — reduces energy loss and heat generation for efficient cylinder movement.
Chemical and temperature resistance — suitable for a wide range of hydraulic fluids and operating conditions.
Easy installation — designed for straightforward retrofit and new builds.
Customizable — available in a wide range of sizes and materials to fit special working conditions.

Why Choose Polypac?

Polypac is a scientific and technical manufacturer specializing in seals and sealing materials. Our 10,000+ sqm facility and 8,000 sqm factory house advanced production and testing equipment. Since 2008 we have developed expertise in filled PTFE materials (bronze, carbon, graphite, MoS₂, glass) and expanded to O-rings in NBR, FKM, silicone, EPDM and FFKM.

Applications

Ideal for hydraulic cylinders in construction, agricultural machinery, industrial presses, mobile equipment and other heavy-duty systems where long-lasting sealing and minimal maintenance are essential.

Customization and Quality Assurance

We work closely with customers and research partners to provide tailored sealing solutions for special working conditions. Each Long Life Cylinder Seal undergoes strict inspection and performance testing to ensure reliability. Polypac’s team supports material selection and design adjustments to meet pressure, temperature and chemical exposure requirements.

Get Started

Choose Polypac Long Life Cylinder Seal to reduce downtime and improve system efficiency. Contact our technical team to discuss custom sizes, material options and sample testing for your specific application.

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Q&A

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.

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 does "AS568" mean?

AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.

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 other questions, please write email to us or call us , we will reply you ASAP.

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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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