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PTFE O-Rings — Polypac High-Performance Sealing Solutions

PTFE O-Rings — Polypac High-Performance Sealing Solutions

Overview of PTFE O-Rings

Polypac PTFE O-Rings deliver exceptional chemical compatibility, low friction and broad temperature capability for demanding sealing applications. Engineered for both static and dynamic service, our PTFE O-rings resist aggressive media, minimize extrusion and ensure long service life where conventional elastomers fail.

Superior Material Options & Filled PTFE

We offer virgin PTFE and a range of filled PTFE compounds—including bronze-filled, carbon-filled, graphite PTFE, MoS₂-filled and glass-filled PTFE—to tailor wear resistance, thermal stability and conductivity. These options optimize sealing performance for pressure, speed and surface-compatibility requirements.

Precision Manufacturing & Quality Control

Polypac’s custom rubber ring and O-ring factory covers over 10,000 m² with 8,000 m² of production space and industry-leading equipment. Our advanced production lines and rigorous testing protocols, developed in collaboration with domestic and international universities and research institutes, guarantee dimensional accuracy, material traceability and repeatable quality for every batch.

Performance & Typical Applications

PTFE O-Rings from Polypac excel in hydraulic systems, chemical processing, oil & gas, food and pharmaceutical equipment, and aerospace components. Key benefits include outstanding chemical resistance, wide temperature range, low permeability and superior frictional properties—critical for valves, pumps, high-pressure cylinders and rotating shafts.

Customization & Complementary Materials

We specialize in custom-sized PTFE O-Rings and compound formulations to meet special working conditions. In addition to PTFE, Polypac supplies O-rings in NBR, FKM, silicone, EPDM and FFKM, enabling you to select the ideal material for compatibility, cost and performance trade-offs.

Why Choose Polypac

Founded in 2008, Polypac combines decades of seal development experience with large-scale manufacturing capacity and responsive technical support. For engineered PTFE O-Rings that perform under extreme conditions, contact Polypac for consultation, rapid prototyping and volume production.

PTFE O-Rings Display

FAQ:

What does "AS568" mean?

AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.

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.

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.

Table of Contents

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PTFE O-Rings — Polypac High-Performance Sealing Solutions
Overview of PTFE O-Rings
Superior Material Options & Filled PTFE
Precision Manufacturing & Quality Control
Performance & Typical Applications
Customization & Complementary Materials
Why Choose Polypac
PTFE O-Rings Display

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