Polypac Hydraulic Cylinder Seals — Reliable, Low-Friction Solutions

Polypac Hydraulic Cylinder Seals deliver durable, low-friction sealing for demanding hydraulic systems. Custom materials, advanced testing, and precise manufacturing ensure leak-free performance across temperatures and chemicals.

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Product Description

Polypac Hydraulic Cylinder Seals — Built for Performance

Polypac offers high-quality hydraulic cylinder seals designed to prevent leakage, reduce friction, and extend service life. Backed by a 10,000 m² facility and advanced production equipment, our seals combine decades of material expertise with a focus on real-world reliability.

Why Choose Polypac Seals?

Durable and low-friction: Filled PTFE options (bronze, carbon, graphite, MoS₂, glass) minimize wear and energy loss.
Wide material range: O-rings and seals available in NBR, FKM, silicone, EPDM, FFKM to match fluids and temperatures.
Custom solutions: Tailored designs for special working conditions to meet your exact specifications.
Advanced testing: Industry-leading production and inspection tools ensure consistent quality and tight tolerances.
Trusted expertise: Since 2008, Polypac has partnered with top universities and research centers for continuous improvement.

Ideal for Demanding Applications

Whether for mobile hydraulics, industrial presses, or offshore equipment, Polypac seals maintain reliable performance under high pressure, wide temperature ranges, and aggressive fluids. Our seals help reduce downtime and maintenance costs while improving overall system efficiency.

Fast Customization and Reliable Supply

With an 8,000 m² production area and streamlined processes, we deliver custom rubber rings, O-rings, and PTFE seals quickly and accurately. Our manufacturing capability supports both small runs and large-volume orders with consistent quality control.

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Choose Polypac Hydraulic Cylinder Seals for proven durability, precise fit, and tailored sealing solutions. Contact us to discuss material options, custom sizes, and sample requests to ensure the best seal for your application.

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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.

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.

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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