Polypac High Temperature Piston Seal — Durable PTFE & Custom Solutions

Polypac high temperature piston seals provide durable, low-friction performance in extreme heat. Made with advanced PTFE compounds and custom options, backed by precision factory testing and material expertise.

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Product Information

Product Overview

Polypac High Temperature Piston Seal is designed for demanding hydraulic and pneumatic systems that operate under extreme heat and pressure. Built from advanced PTFE-filled compounds and optimized elastomers, this seal delivers reliable performance, minimal wear, and long service life.

Why choose Polypac?

Polypac combines over a decade of seal expertise with modern production and testing facilities. Our factory spans more than 10,000 m2 and uses industry-leading equipment to ensure consistent quality. We also work closely with universities and research institutes to develop better sealing materials and tailored solutions for special working conditions.

Key Features & Benefits

High temperature resistance: PTFE and specialty fillers maintain integrity at elevated temperatures, preventing extrusion and degradation.
Low friction and smooth operation: Engineered compounds reduce friction for smoother piston movement and improved energy efficiency.
Long service life: Strong wear resistance means fewer replacements and lower maintenance costs.
Customizable: Available in multiple sizes, profiles, and material blends including bronze-filled, carbon-filled, graphite, MoS2, and glass-filled PTFE.
Wide material range: We also supply compatible O-rings and rubber parts in NBR, FKM, silicone, EPDM, and FFKM for full system compatibility.

Applications

Ideal for high-temperature hydraulic cylinders, industrial presses, injection molding machines, and other equipment where heat, pressure, and chemical exposure challenge sealing performance.

Quality Assurance & Custom Service

Each Polypac seal undergoes strict inspection and testing to meet performance standards. Our R&D team provides material selection and design advice to match your operating conditions. For unique demands, we offer custom molding and precision machining to ensure optimal fit and function.

Choose Polypac High Temperature Piston Seal for dependable sealing under harsh conditions. Contact us to discuss specifications, request samples, or get a custom quotation tailored to your application.

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Q&A

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.

How can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

About other questions pls contact me directily.

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