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

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Polypac Double Lip Rod Seal

Polypac Double Lip Rod Seal offers low friction, long life and reliable hydraulic sealing. Made with advanced materials and strict testing, it delivers dependable performance in demanding conditions.

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Product Details

Product Overview

The Polypac Double Lip Rod Seal is designed for hydraulic cylinders that demand reliable sealing, low friction and long service life. Its double-lip geometry provides primary sealing and a secondary barrier against contamination and leakage, making it ideal for medium- to high-pressure applications.

Key Features

Reliable Seal Performance

The double-lip design gives two-stage protection: the primary lip seals fluid while the secondary lip keeps out dirt and moisture. This reduces wear and extends the seal life.

Low Friction and Smooth Operation

Optimized profile and material selection minimize friction and stick-slip, improving cylinder response and lowering energy loss.

Material Options

Polypac offers the Double Lip Rod Seal in a variety of materials to match working conditions: PTFE blends for low friction and wear resistance, NBR for general use, FKM for high-temperature and chemical resistance, and special compounds for extreme environments.

Applications

Suitable for hydraulic cylinders in construction machinery, agricultural equipment, industrial presses and marine systems. The seal works well in both mobile and stationary equipment where contamination control and long life are required.

Why Choose Polypac

Polypac is a technical seal manufacturer founded in 2008. Our factory spans over 10,000 square meters, with 8,000 square meters of production space and advanced production and testing equipment. We started with filled PTFE seals and now supply a wide range of O-rings and seals in NBR, FKM, silicone, EPDM and FFKM. Long-term partnerships with universities and research institutes ensure continual product improvement.

Customization and Quality

We provide custom sizes, material blends and tolerances to meet specific working conditions. Every seal undergoes strict quality checks and performance testing to ensure it meets industry standards and your expectations.

Installation and Maintenance Tips

Install with clean tools and correct groove dimensions. Avoid sharp edges on the rod and cylinder bore. Regular inspection and appropriate lubrication will further extend seal life.

Conclusion

Polypac Double Lip Rod Seal combines proven design, material expertise and rigorous manufacturing to deliver dependable hydraulic sealing. For customized solutions or technical advice, contact Polypac’s engineering team.

Detailed display

Frequently Asked Questions

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

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.

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.

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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