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

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Polypac Piston Rod Seal Manufacturer — Reliable Custom Hydraulic Seals

Polypac offers high-quality piston rod seals and custom hydraulic sealing solutions. With advanced production, extensive material options (PTFE, NBR, FKM, silicone, EPDM, FFKM) and strong R&D partnerships, we deliver durable, tested seals for demanding conditions.

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Product Information

Overview — Trusted Piston Rod Seal Manufacturer

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier focused on piston rod seals and custom sealing solutions. Founded in 2008, our factory covers over 10,000 m² with 8,000 m² of production space and advanced testing equipment. We combine experienced manufacturing with long-term cooperation with universities and research institutions to ensure reliable, high-performance seals.

What We Offer

Piston rod seals and hydraulic seals for mobile and industrial equipment
Custom rubber rings and O-rings in NBR, FKM, silicone, EPDM, FFKM
Filled PTFE options: bronze, carbon, graphite, MoS₂, glass-filled PTFE
Oil seal and custom solutions for special working conditions

Key Advantages

Durable performance: Materials and designs selected to resist abrasion, pressure, and temperature.
Precision manufacturing: Modern production lines and rigorous quality testing reduce failure rates.
Wide material range: From classic NBR to high-end FFKM and filled PTFE for extreme environments.
Customization: Fast prototyping and tailored seals to fit unique piston rod dimensions and working conditions.

Applications

Polypac piston rod seals are ideal for hydraulics in construction machinery, agricultural equipment, industrial presses, and oil & gas systems. Our seals perform well in dusty, wet, high-temperature, and high-pressure environments.

Why Choose Polypac

As one of China’s largest seal developers, Polypac combines scale and expertise. Our R&D ties with universities and research institutes keep our products up-to-date and reliable. Customers benefit from competitive lead times, strict quality control, and a wide selection of sealing materials and designs.

Ready to improve equipment uptime and reduce leakage? Contact Polypac for samples, material guidance, and custom piston rod seal solutions. Our team will recommend the right hydraulic seals for your application.

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Frequently Asked Questions

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 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.

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.

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