Polypac Large Clearance Rod Seal

Polypac Large Clearance Rod Seal provides reliable hydraulic rod sealing for heavy-duty and high-clearance cylinders. Engineered with advanced materials and strict testing, it delivers long service life and stable performance in harsh conditions.
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Product Description

Product Overview

The Polypac Large Clearance Rod Seal is designed for hydraulic cylinders with larger rod-to-bore clearances. It provides dependable sealing against fluid leakage, contamination and wear in demanding environments. Built with Polypac’s decades of sealing expertise, this rod seal balances easy installation, strong retention and long-term performance.

Key Features

High Clearance Compensation

Specifically shaped to handle increased rod-to-bore clearance, the seal maintains contact and sealing force even where standard seals would fail.

Durable Materials

Available in advanced PTFE compounds and elastomers, the seal resists extrusion, friction and chemical attack. Polypac’s material options include filled PTFE variants and common rubber types such as NBR, FKM, EPDM and silicone to match fluid and temperature needs.

Easy Installation

Designed with user-friendly profiles that simplify assembly and reduce installation time, helping maintenance crews get machines back into service faster.

Materials & Manufacturing

Polypac began with filled PTFE technologies and continues to develop high-performance sealing materials. Our factory spans over 10,000 square meters, with 8,000 square meters of production space and advanced testing equipment. Every Large Clearance Rod Seal is manufactured and inspected to ensure consistent dimensions and material integrity.

Applications

Ideal for construction machinery, agricultural equipment, mining, and industrial hydraulic systems where rods may have wear, misalignment or larger clearances. The product suits both new builds and retrofit repairs.

Quality and Reliability

Strict Testing

Polypac performs rigorous tests to verify performance under pressure, temperature changes and abrasive conditions. Collaboration with universities and research centers keeps our products aligned with the latest sealing science.

Why Choose Polypac

With over a decade of specialized experience, advanced facilities, and a broad material portfolio, Polypac delivers Large Clearance Rod Seals that are trustworthy and long-lasting. Our seals are supported by custom solutions and responsive technical service to meet unique working conditions.

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  • FSXL-O Rotary Seals

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.
Can I reuse a seal?
We strongly recommend never reusing seals. Once compressed and used, a seal takes a "set" and its elastic properties are degraded. Reusing it almost always results in a leak. Always install a new seal during any maintenance or repair.
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.
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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Polypac Industrial Technology Co.,Ltd
No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.
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Tags
Heavy Duty Seal System
Heavy Duty Seal System
Pneumatic Cylinder Repair
Pneumatic Cylinder Repair
guide ring for hydraulic seals
guide ring for hydraulic seals
Robust Dust Seal
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Whether you need product details, technical support, or a custom solution, we’re here to assist.

Your privacy matters to us. We handle your data securely, in compliance with international quality and safety certifications.

With over 10 years of sealing expertise, we are ready to provide you with reliable solutions.

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How Can We Help You?

Whether you need product details, technical support, or a custom solution, we’re here to assist.

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Your privacy matters to us. We handle your data securely, in compliance with international quality and safety certifications.

With over 10 years of sealing expertise, we are ready to provide you with reliable solutions.

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