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

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Polypac Rod Seal Supplier — Custom Hydraulic Rod Seals

Polypac specializes in custom rod seals and O-rings for hydraulic systems, offering filled PTFE and multiple elastomers. With advanced facilities, R&D partnerships, and strict testing, Polypac delivers durable, tailored sealing solutions for demanding conditions.

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Product Information

Polypac Rod Seals — Reliable sealing for hydraulic systems

Polypac is a leading rod seal supplier providing high-performance rod seals and O-rings designed for long life and stable operation in hydraulic cylinders. Founded in 2008, we combine advanced production equipment, rigorous testing, and close collaboration with universities and research institutes to deliver reliable sealing solutions for a wide range of industries.

Why choose Polypac rod seals?

Custom design: We tailor seals for special working conditions—high pressure, extreme temperature, abrasion or chemical exposure.
Proven materials: We manufacture filled PTFE (bronze, carbon, graphite, MoS₂, glass) and a broad range of elastomers (NBR, FKM, FFKM, silicone, EPDM).
Manufacturing scale: Our custom rubber ring and O-ring factory covers over 10,000 m² with 8,000 m² production space and advanced testing equipment.

Materials & customization

Polypac started with filled PTFE technology and expanded to a full portfolio of sealing materials. For demanding rod seal applications, we select the optimal compound—low friction PTFE for smooth motion, carbon- or bronze-filled for wear resistance, and specialty elastomers for chemical and temperature resistance. We provide rapid prototyping and performance tuning to match your specifications.

Quality & service

Every seal goes through strict inspection and performance tests to ensure dimensional accuracy, material integrity and long-term reliability. As one of China’s largest dedicated seal manufacturers, we maintain long-term partnerships with research institutions to continuously improve product performance. Our global supply capability and responsive technical support make Polypac a trusted partner.

Applications & ordering

Polypac rod seals are ideal for construction machinery, industrial hydraulics, mobile equipment, and special-purpose machinery. Contact us for consultation, material recommendations, samples, and customized quoting. Choose Polypac for durable rod seals that reduce downtime and improve system efficiency.

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Frequently Asked Questions

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.

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.

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.

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.

Get in Touch

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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