Fluorocarbon (FKM) o-rings offer excellent resistance to chemicals, oil, ozone and sunlight with a higher temperature range than nitrile, AFLAS, EPDM and some of the common industrial materials with an operating range up to 400° F. Can be used in petroleum oils and fuel, non flammable hydraulic fuels, acids, aircraft engine applications, synthetic hydraulic fluids, organic solvents, mineral and vegetable oil and grease, aliphatic hydrocarbons (butane, propane, natural gas), hard vacuum applications, silicone oils and greases, solvents and water or steam (up to 400°F). It cannot be used in amines, glycol based brake fluids, methanol, ammonia gas, amines, alkalis, hydrocarbons, ketones, low molecular weight esters and ethers, fireproof hydraulic fluids, formic and acetic acids.
Fluorocarbon (FKM) o-rings is generally composed of vinylidene fluoride (VF2), hexafluoropropylene (HFP), containing 66% - 70% fluorine. And other components are added to improve different properties, like tetrafluoroethylene, which offers better chemical resistance and perfluoromethylvinyl ether (PMVE) which improves FKM's low temperature properties.
What's The Difference Between Fluorocarbon (FKM) & Perfluorocarbon (FFKM) O-Rings?
While some characteristics can be common in FKM and FFKM materials, there are significant differences in chemistry and use of the materials. Fluorocarbon material (FKM) in general is used in higher temperature applications up to 400° F or when compatibility with chemicals and fluids are concerned. Incompatible material usage can lead to premature, or in some cases, catastrophic failure. Refer to published compatibility tables for proper material selection.
Perfluoranted materials (FFKM) are significantly more costly than standard FKM material and are used in extreme cases and environments. Temperature ranges can reach 625° F and offer wide chemical and harsh environment capability. Contact Engineered Seal Products for more information on Perfluoronated materials.
Engineered Seal Products has the expertise and inventory for your fluorocarbon (FKM) o-ring applications. For over 50 years, ESP has been the leading engineering, quality, and supply chain choice for both standard and custom sealing applications. A seal, no matter the application, has to do just that.
Also Know As:
Viton®, Dai-el®, Fluorel®, Tecnoflon®