Viton® O-Rings

High-temperature chemical seal ring

FKM (Viton®) O-rings combining high-temperature capability with broad chemical and fuel resistance for demanding static and dynamic duty.

Continuous service to +200°C, peaks higher
Resists fuels, oils, aromatics, ozone and many chemicals
Excellent compression set and ageing resistance
Precision-moulded to AS568 and ISO 3601
FFKM upgrade available for the most aggressive media

Temperature: -20°C to +200°C (+250°C peak)
Pressure: Up to 210 bar (with anti-extrusion back-up)
pH range: 1 – 13

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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.

SealGuard

Technical Datasheet

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

Viton® O-Rings

High-temperature chemical seal ring

01

Material & Construction

Fluoroelastomer (FKM / Viton®); GLT low-temperature and FFKM grades available

02

Service Envelope

Temperature range	-20°C to +200°C (+250°C peak)
Pressure rating	Up to 210 bar (with anti-extrusion back-up)
pH range	1 – 13

03

Media Compatibility

Fuels & aromaticsMineral & synthetic oilsMany acids & solventsOzone & oxygen

04

Dimensions & Sizing

AS568 -001 to -475 · metric BS 1806 / ISO 3601 · cord Ø1.0–10.0 mm

05

Standards & Conformance

AS568B
ISO 3601
BS 1806

06

Certifications

ISO 9001
FDA grade (available)
RoHS / REACH

07

Additional Specifications

Hardness	75 Shore A standard (75–90 range)
Compression set	Very low (excellent recovery)

Density	≈ 1.85 g/cm³
Not suitable for	Ketones, hot water/steam, amines

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

FKM 75 Shore A (general)
FKM 90 Shore A (high pressure)
FKM low-temperature grade (GLT)
FFKM (perfluoroelastomer, severe duty)
FDA-compliant FKM grade

02

Sizes & configurations

AS568 -001 to -475
Metric BS 1806 / ISO 3601
Cord Ø1.0–10.0 mm
Vulcanised endless rings (large bore)
Cord stock by the metre
Custom sizes to drawing

In ServiceUSE

Where it holds the line

When temperature or chemistry exceeds nitrile's limits, FKM (Viton®) takes over. It withstands continuous service to +200°C — and higher for short excursions — while resisting fuels, oils, aromatic hydrocarbons, ozone and many aggressive chemicals that swell or attack other elastomers. SealGuard FKM O-rings are precision-moulded to AS568 and ISO 3601 at a 75 Shore A standard, making them the trusted ring for hot-oil, fuel-system and chemical-process sealing where reliability is non-negotiable.

Typical applications

01Hot-oil and high-temperature systems
02Fuel-system and aromatic-hydrocarbon service
03Chemical-process equipment
04Aerospace and automotive sealing
05Vacuum and semiconductor duty

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Let’s specify it

Specify this seal for your service.

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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