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PTFE Coated O-Rings — High-Performance Sealing Solutions by Polypac

PTFE Coated O-Rings — Precision Sealing for Demanding Conditions

Why Choose PTFE Coated O-Rings

PTFE Coated O-Rings provide the chemical resistance of PTFE with the elasticity of an elastomer core, delivering low friction, anti-stick performance, and exceptional wear life. Ideal for aggressive chemicals, high temperatures, and dynamic reciprocating motion, these O-rings minimize maintenance and downtime while extending service intervals.

Materials & Construction

Polypac's PTFE Coated O-Rings combine a filled PTFE outer layer (bronze, carbon, graphite, MoS₂ or glass-filled options) with cores in NBR, FKM, silicone, EPDM or FFKM. Our formulations optimize sealing performance across pressures, temperatures, and media, offering tailored solutions for oil, hydraulic, and process industries.

Custom Manufacturing & Capacities

Founded in 2008, Polypac operates a custom rubber ring and O-ring factory covering over 10,000 m² with 8,000 m² of production space. With industry-leading equipment and close collaboration with universities and research institutes, we deliver scalable production, tight tolerances, and rapid prototyping to meet bespoke requirements.

Quality, Testing & Reliability

Our production lines and testing facilities adhere to strict quality protocols. Each PTFE Coated O-Ring undergoes dimensional inspection, material analysis, and performance validation under simulated working conditions to ensure leak-free sealing and long-term reliability in field applications.

Applications & Industry Use Cases

Commonly used in hydraulic cylinders, valves, pumps, and rotating or reciprocating shafts, PTFE Coated O-Rings excel where low friction and chemical compatibility are critical. They are particularly valuable in oil & gas, chemical processing, food processing, and high-temperature systems.

Service & Technical Support

Polypac offers material selection guidance, design optimization, and on-site testing support. Our engineering team assists with joint development for special working conditions, ensuring each PTFE Coated O-Ring meets performance targets and regulatory needs.

Get Started with Polypac

For reliable, low-friction sealing that reduces wear and extends equipment life, choose Polypac’s PTFE Coated O-Rings. Contact us for samples, drawings, and custom sealing solutions tailored to your application.

PTFE Coated O-Rings Display

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.

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.

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.

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.

Table of Contents

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PTFE Coated O-Rings — Precision Sealing for Demanding Conditions
Why Choose PTFE Coated O-Rings
Materials & Construction
Custom Manufacturing & Capacities
Quality, Testing & Reliability
Applications & Industry Use Cases
Service & Technical Support
Get Started with Polypac
PTFE Coated O-Rings Display

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