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PTFE Piston Seal Solutions by Polypac

PTFE Piston Seal Solutions by Polypac

Overview — Precision Sealing for Demanding Applications

Polypac specializes in PTFE Piston Seal development and manufacturing for hydraulic and high-performance systems. Since 2008, we have focused on filled PTFE formulations and tailored sealing strategies that ensure low friction, long service life and excellent chemical compatibility. Whether you need standard sizes or precision custom seals, our PTFE piston seal solutions deliver consistent performance in harsh environments.

Materials & Performance — Filled PTFE for Enhanced Durability

Our PTFE piston seals are available in a range of filled compounds—bronze-filled PTFE, carbon-filled PTFE, graphite PTFE, MoS2-filled PTFE and glass-filled PTFE—each optimized for wear resistance, thermal stability and reduced creep. PTFE Piston Seal designs offer exceptional low friction, wide temperature range and resistance to aggressive media, making them ideal for hydraulic cylinders, high-speed actuators and chemically aggressive systems.

Manufacturing & Customization — Advanced Facility and Testing

Polypac's custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space and industry-leading equipment for precision molding, machining and testing. Our experienced engineers collaborate with universities and research institutes to develop new sealing materials and production processes. We provide molded and machined PTFE piston seals, rapid prototyping, strict dimensional control and full quality inspection to meet ISO-level expectations.

Applications & Why Choose Polypac

PTFE piston seals from Polypac are designed for hydraulics, mobile equipment, oil & gas, chemical processing and special working conditions where performance and longevity matter. In addition to PTFE seals, we produce O-rings in NBR, FKM, silicone, EPDM and FFKM to support integrated sealing systems. Choose Polypac for proven material expertise, scalable production capacity and tailored sealing solutions that reduce downtime and total cost of ownership. Contact us to specify a PTFE piston seal engineered for your application.

PTFE Piston Seal Display

FAQ:

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.

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.

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.

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.

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.

Table of Contents

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PTFE Piston Seal Solutions by Polypac
Overview — Precision Sealing for Demanding Applications
Materials & Performance — Filled PTFE for Enhanced Durability
Manufacturing & Customization — Advanced Facility and Testing
Applications & Why Choose Polypac
PTFE Piston Seal Display

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