PTFE Encapsulated O-Rings

Universal-resistance elastic-core ring

An elastic silicone or FKM core sheathed in seamless FEP or PFA, combining near-universal chemical resistance with O-ring springiness.

Near-universal chemical resistance from FEP/PFA jacket
Resilient silicone or FKM core for O-ring spring-back
Seamless, non-contaminating encapsulation
Very wide -60°C to +260°C temperature range
Low friction and non-stick surface

Temperature: -60°C to +260°C
Pressure: Up to 80 bar (static)
pH range: 0 – 14

Translucent PTFE-encapsulated O-rings showing the coloured elastic core — O-RingsREF · ptfe-encapsulated-oring

Technical DatasheetSPEC

The numbers, on the record

Every figure below is the specification we hold ourselves to — material, service envelope, media compatibility and conformance. Download it as a standalone document for your dossier.

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Technical Datasheet

Doc No.: DS-PTFE-ENCAPSULATED-ORING
Revision: Rev. A
Issue: 2026-Q3
Class: O-Rings

PTFE Encapsulated O-Rings

Universal-resistance elastic-core ring

01

Material & Construction

Seamless FEP or PFA jacket over a silicone or FKM elastomer core

02

Service Envelope

Temperature range	-60°C to +260°C
Pressure rating	Up to 80 bar (static)
pH range	0 – 14

03

Media Compatibility

Strong acidsCausticsSolventsOxidisersHigh-purity media

04

Dimensions & Sizing

AS568 -010 to -475 · metric ISO 3601 · cord Ø1.8–12.0 mm

05

Standards & Conformance

AS568B
ISO 3601

06

Certifications

ISO 9001
FDA 21 CFR 177.1550
USP Class VI

07

Additional Specifications

Jacket	FEP (to +205°C) / PFA (to +260°C)
Jacket thickness	0.3–0.6 mm seamless

Core	Silicone (elastic) or FKM (resilient)
Service	Static / slow dynamic

Specify & QuoteORDER

Build your line item

Choose the material grade and size that match your duty, set a quantity, and add a fully-specified line to your quote. No prices, no obligation — our engineers confirm specification and lead time on every enquiry.

01

Material grades

FEP-encapsulated silicone core
FEP-encapsulated FKM core
PFA-encapsulated silicone core (higher temp)
PFA-encapsulated FKM core
FDA-compliant encapsulated grade

02

Sizes & configurations

AS568 -010 to -475
Metric ISO 3601 sizes
Cord Ø1.8–12.0 mm
Welded large-diameter rings
Silicone vs FKM core selection
Custom sizes to drawing

In ServiceUSE

Where it holds the line

The PTFE-encapsulated O-ring solves the hardest sealing problem: a medium that attacks every elastomer but a groove that still needs spring-back. A resilient silicone or FKM core provides the elastic memory, while a seamless FEP or PFA jacket gives the ring the near-universal chemical resistance and low friction of fluoropolymer. The result is a single ring that seals aggressive acids, caustics, solvents and high-purity media across a very wide temperature range — where neither a plain elastomer nor a solid PTFE ring could cope.

Typical applications

01Aggressive acid, caustic and solvent service
02Glass-lined reactors and valves
03High-purity pharmaceutical and semiconductor duty
04Chlorine and oxidiser systems
05Mixed-chemistry process equipment

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Let’s specify it

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Send us the media, temperature, pressure and motion for your duty and our engineers will confirm the right material grade, size and standard for your application.

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