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

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Polypac High Temperature Piston Seal — Reliable Performance in Extreme Heat

Polypac high temperature piston seals offer durable, low-friction sealing for hydraulic systems working in extreme heat. Advanced materials, rigorous testing, and custom sizes ensure long service life and reliable operation.

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Product Description

Product Overview

The Polypac High Temperature Piston Seal is engineered to provide reliable sealing performance in hydraulic cylinders operating under elevated temperatures. Built from advanced filled PTFE compounds and compatible elastomers, this seal minimizes wear and leakage while maintaining smooth piston movement.

Materials and Performance

Polypac uses proven materials such as bronze-filled PTFE, carbon-filled PTFE, and high-temperature elastomers to deliver excellent heat resistance, low friction, and chemical compatibility. The result is a seal that resists extrusion, reduces energy loss, and extends service intervals.

Factory & Quality Assurance

Polypac is a scientific and technical hydraulic seal manufacturer with a custom rubber ring and O-ring factory covering over 10,000 m². Our 8,000 m² production area houses advanced manufacturing and testing equipment. Since 2008, we have developed sealed materials and products in close collaboration with universities and research institutes to ensure consistent quality and performance.

Practical Benefits

- Long service life in high-temperature environments
- Low friction for smoother piston response
- Strong chemical compatibility with hydraulic fluids
- Reduced downtime through durable construction
- Available in standard sizes and custom designs

Applications

Ideal for hydraulic systems in industries such as oil & gas, metallurgy, foundry, power generation, and heavy machinery where heat and harsh conditions are common. The seal is suitable for both new equipment and retrofits.

Why Choose Polypac

Choosing Polypac means choosing a partner that values performance and service. We offer fast customization, clear technical support, and strict quality checks. Our history of PTFE development and a broad range of O-ring materials (NBR, FKM, silicone, EPDM, FFKM) allows tailored solutions for special working conditions.

Ordering & Support

Contact Polypac for sample evaluation, custom dimensions, and material selection. We prioritize responsive communication and ensure your sealing solution matches the application's operating temperature and fluid environment.

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FAQ

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.

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.

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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