PTFE Encapsulated O Rings

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Product Details:

Material PTFE encapsulation over FKM (Viton), Silicone, or EPDM core
Natural Rubber Not applicable; does not contain natural rubber
Color White, transparent, or as per encapsulation material
Part Type O-Ring
Flame Resistance Level PTFE is inherently flame resistant
Style Circular, encapsulated
Components PTFE jacket/encapsulation, elastomeric core
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PTFE Encapsulated O Rings Price And Quantity

Minimum Order Quantity 10 Number

PTFE Encapsulated O Rings Product Specifications

Product Type PTFE Encapsulated O-Ring
Compression Ratio Typical compression set <25% depending on core material
Components PTFE jacket/encapsulation, elastomeric core
Style Circular, encapsulated
Flame Resistance Level PTFE is inherently flame resistant
Part Type O-Ring
Natural Rubber Not applicable; does not contain natural rubber
Color White, transparent, or as per encapsulation material
Material PTFE encapsulation over FKM (Viton), Silicone, or EPDM core
Diameter Custom and standard internal diameters available
Width Customizable, standard cross sections available from 1.78 mm to 25.4 mm
Temperature Resistance -60C to +260C (FEP encapsulation) or up to +300C (PFA encapsulation)
Tensile Strength 12-17 MPa (typical for FEP encapsulation)
Resistance level Excellent chemical and temperature resistance
Surface Finish Smooth, non-porous, low friction
Size Standard and custom sizes available as per DIN, AS568, ISO specifications
Water Absorption <0.01% (PTFE material)
Usage & Applications Used for sealing in chemical processing, food and pharmaceutical industries, and high-purity applications requiring strong chemical and temperature resistance.
Thermal Conductivity 0.25 W/mK (approximate for PTFE)
Length Continuous rings based on diameter specification
Thickness Cross section thickness as per standard O-Ring sizes
Feature Chemical resistance, low friction, non-stick, high temperature resistance, non-contaminating
Density 2.19 Gram per cubic centimeter(g/cm3)
Tolerance Standard O-Ring tolerances, typically 0.08 mm
Rubber Type FKM, Silicone, or EPDM (core material)
Hardness PTFE encapsulation: 55-62 Shore D
Weight Varies per size and material, typically lightweight

PTFE Encapsulated O Rings Trade Information

FOB Port Vadodara
Payment Terms Cheque, Cash in Advance (CID)
Supply Ability 1000 Number Per Day
Delivery Time 3 Days
Sample Available Yes
Sample Policy Free samples are available
Packaging Details carton
Main Export Market(s) Australia, North America, Asia, Western Europe, Central America, South America, Eastern Europe, Africa, Middle East
Main Domestic Market All India
Certifications ISO 9001 : 2015

Product Description

PTFE encapsulated O-Rings are designed to combine the sealing properties of the rubber O-ring with the chemical resistance of Teflon PTFE. They are generally manufactured from Viton or silicone rubber and are coated in a thin moulded layer of Teflon FEP or PFA.

Exceptional Chemical and Thermal Resistance

The PTFE encapsulated O-rings withstand exposure to nearly all chemicals except molten alkali metals and elemental fluorine. They also maintain their sealing integrity under extreme temperatures from -60C up to +260C (+300C for PFA encapsulation), supporting a prolonged service life even in demanding environments.

Versatile Applications and Standards Compliance

These O-rings are ideal for high-purity and hygienic environments, including chemical processing, food manufacturing, and pharmaceutical production. Certified to FDA and USP Class VI standards, they meet stringent industry regulations. Their excellent permeation resistance further enhances suitability for critical utility systems.

Customizable Sizes for Diverse Needs

Whether you need standard DIN, ISO, or AS568 sizes or require a custom dimension, PTFE encapsulated O-rings are available in a wide range of diameters and cross sections. This flexibility ensures precise fitment for various sealing configurations and operational requirements.

FAQs of PTFE Encapsulated O Rings:

Q: How are PTFE encapsulated O-rings installed in existing systems?

A: PTFE encapsulated O-rings are constructed for easy installation within standard O-ring grooves. Their smooth, non-porous surface and flexibility enable quick placement during system setup or maintenance, streamlining the sealing process without the need for specialized tools.

Q: What benefits do PTFE encapsulated O-rings offer for food and pharmaceutical applications?

A: These O-rings are compliant with FDA and USP Class VI standards, ensuring non-contaminating performance. Their chemical inertness, non-stick surface, and resistance to permeation make them ideal for environments requiring sterility and strong chemical and temperature resistance.

Q: When should I choose between a solid or hollow elastomeric core for these O-rings?

A: Solid cores are preferred for applications requiring higher pressure ratings and improved mechanical robustness. Hollow cores are suitable when enhanced flexibility and lower compression forces are needed, especially in dynamic sealing scenarios.

Q: Where are PTFE encapsulated O-rings most commonly used?

A: These O-rings are predominantly utilized in chemical processing, medical device manufacturing, food production, and any applications demanding reliable, inert seals in aggressive conditions or high-purity environments.

Q: What is the typical process for customizing the dimensions of an encapsulated O-ring?

A: Customization involves specifying the required internal diameter, cross-section thickness, and encapsulation material. Manufacturers can provide rings tailored to DIN, AS568, ISO, or special specifications, supported by certificates upon request.

Q: How does FEP or PFA encapsulation affect service life and temperature resistance?

A: FEP encapsulation delivers excellent performance up to +260C, while PFA extends capability to +300C. Both materials grant superior resistance to chemical attack and permeation, thus ensuring long operational lifespans in harsh environments.

Q: What usage advantages do PTFE encapsulated O-rings have over standard rubber O-rings?

A: Compared to standard rubber O-rings, the PTFE encapsulated variant offers superior chemical resistance, lower friction, higher temperature endurance, and non-stick properties. This renders them maintenance-friendly and less prone to failure in demanding settings.

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