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

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Polypac Custom Rod Seals Manufacturer — Reliable Sealing Solutions

Polypac manufactures high-performance custom rod seals for hydraulic systems. With advanced materials (PTFE variants, NBR, FKM, silicone, EPDM, FFKM), strict testing, and customized designs, Polypac offers trusted, long-lasting sealing solutions backed by an experienced R&D team.

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Product Details

Polypac Custom Rod Seals Manufacturer

Polypac designs and produces custom rod seals for hydraulic applications that require durable, leak-free performance. Founded in 2008, Polypac combines advanced materials, modern production equipment, and close collaboration with research institutes to deliver reliable seals for varied working conditions.

Why Choose Polypac Rod Seals

Our rod seals are engineered for stable operation, long service life, and easy installation. We focus on practical solutions that reduce downtime and maintenance cost. Whether you need seals for high pressure, wide temperature ranges, or abrasive environments, Polypac provides tailored products that perform.

Materials and Options

We offer rod seals in a wide range of materials to suit different environments:

Filled PTFE (bronze, carbon, graphite, MoS₂, glass) for low friction and wear resistance
Elastomers: NBR, FKM, EPDM, silicone for flexibility and sealing elasticity
FFKM for extreme chemical and temperature resistance

Custom Design and Manufacturing

Polypac's 10,000+ m² facility (8,000 m² production area) is equipped with advanced molding and testing systems. We provide customized seal profiles, sizes, and compound formulations to meet your specific rod diameter, pressure, and motion type. Rapid prototyping and small-batch production are available for testing and pilot runs.

Quality Control and Testing

Every seal undergoes strict dimensional checks, material verification, and performance testing. Our lab and equipment are among the most advanced in the industry, and we maintain long-term partnerships with universities and research centers to ensure state-of-the-art solutions and continuous improvement.

Applications

Polypac rod seals are widely used in hydraulic cylinders, construction machinery, agricultural equipment, mining, marine systems, and industrial presses. They are designed to handle axial movement, high pressure, and contamination challenges commonly found in field applications.

Trusted Partner Since 2008

As one of China’s largest seal manufacturers, Polypac combines decades of material expertise with practical manufacturing experience. Choose Polypac for dependable custom rod seals that protect your equipment and keep operations running smoothly.

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Question you may concern

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.

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.

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 as soon as possible.

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