Viton O-Rings

Fluorocarbon (FPM, FKM, Viton®*)

viton-oringsGlobal O-Ring carries a deep and broad inventory of Viton o-rings. See below for our standard AS568 Viton o-rings, visit our Metric o-rings page for metric Viton o-ring sizes, or contact us if you need a special type or size of Viton o-ring you can’t find here.

At Global O-Ring, all of our Standard AS568 Viton o-rings are made from Genuine DuPont Viton®…not a generic FKM. Learn more about the Genuine DuPont Viton® advantage.

Material Description

Viton® is a trade name for the DuPont brand of fluorocarbon, also known as FKM. FKM is a well-known high-performance rubber that has excellent resistance to high temperature, ozone, weather, oxygen, mineral oil, fuels, hydraulic fluids, aromatics and many organic solvents and chemicals.

Viton® Variations

Viton® variations include: Viton® A, Viton® B, Viton® F, Viton® GLT, Viton® GFLT, Viton® Extreme (a.k.a. Viton® ETP)

Viton® general type (A: 66% fluorine), middle fluorine content type (B, GBL: 67 to 68.5% fluorine), high fluorine content type (F, GF: 70% fluorine), improving low temperature flexibility type (GLT, GFLT) and excellent resistance to more chemicals and solvents (Viton® ETP Extreme). We also can supply excellent acid and alkali resistance parts made by Viton® TBR.

For more detailed information on specific types of Viton®, please download the Viton® Selection Guide.

Cure system

Standard FKM compounds are Bisphenol-cured. FKM compounds with peroxide-cured possess better acid solution resistance than the bisphenol-cured and can replace litharge-cured applied in acid solutions. In some lubricants, adding a few organic amide or amine, or choosing peroxide-cured system Viton® will be better than bisphenol curing systems.

Temperature Range

Standard Low Temp: -26°C (-15°F)

Standard High Temp: 232°C (450°F)

* Viton® is a registered trademark of Dupont Dow Elastomers.

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