Polypac Custom Hydraulic Rod Seals Manufacturer

Polypac offers reliable custom hydraulic rod seals and O-rings made from advanced materials and precision manufacturing. With extensive testing, large-scale production, and collaboration with research institutes, we deliver durable sealing solutions for demanding hydraulic systems.

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Product Information

About Polypac

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier focused on seal production, sealing material development, and customized solutions for special working conditions. Founded in 2008, our factory covers over 10,000 m² with 8,000 m² of production space and advanced manufacturing and testing equipment.

Custom Hydraulic Rod Seals

Polypac specializes in custom hydraulic rod seals designed to keep hydraulic systems leak-free and running smoothly. Our seals are tailored to your application — whether high pressure, extreme temperature, abrasive environments, or long service life requirements. We design and produce seals that fit precisely and perform consistently.

Materials We Use

We started with filled PTFE products (bronze, carbon, graphite, MoS₂, glass) and now offer a wide range of elastomers and high-performance materials, including NBR, FKM (Viton), silicone, EPDM, and FFKM. This variety lets us match material properties to your operating conditions for optimal performance.

Performance Features

Low friction and wear resistance
High pressure and temperature tolerance
Excellent chemical compatibility
Stable sealing under dynamic movement

Quality & Testing

Our production and testing equipment are among the most advanced in the industry. We conduct rigorous dimensional checks, material testing, and performance trials. Long-term collaboration with universities and research institutions helps us innovate and maintain high quality standards.

Why Choose Polypac

Choosing Polypac means reliable sealing solutions backed by decades of experience. We combine large-scale manufacturing capacity with deep material knowledge and custom design services. Customers get seals that reduce downtime, extend component life, and lower maintenance costs.

Ordering & Customization

We offer custom design, rapid prototyping, and volume production. Provide your working conditions or drawings, and our engineers will recommend material and geometry choices to meet your needs. Contact Polypac for a quote or technical consultation.

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Q&A

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.

What is the purpose of the metal spring in a rotary shaft seal?

The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.

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.

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