FFKM o ring Viton O ring FKM O ring

FFKM /Viton/ FKM Fluorocarbon O-rings should be considered for use in aircraft, automobile and other mechanical devicesrequiring maximum resistance to elevated temperatures and to many fluids. FFKM FKM (FPM, Viton,Fluorel) resist mineral oils and greases, aliphatic, aromatic and also special chlorinated hydrocarbons,petrol, diesel fuels, silicone oils and greases. It is suitable for high vacuum applications. Manyfluorocarbon compounds have a higher than normal mold shrinkage rate, molds for fluorocarbon productsare often different from molds for Nitrile. About Viton / FKMFluorocarbon elastomers have grown to major importance in the seal industry. Due to its wide range ofchemical compatibility, temperature range, low compression set, and excellent aging characteristics,fluorocarbon rubber is the most significant single elastomer developed in recent history. Fluorocarbonelastomers are highly fluorinated carbon-based polymers used in applications to resist harsh chemicaland ozone attack. -The working temperature range is considered to be -26°C to +205°/230°C (-15°F to +400°/440°F). -For short working periods it will take even higher temperatures. -Special compounds having improved chemical resistance are also available with new types alwaysbeing developed. Generally speaking, with increasing fluorine content, resistance to chemical attack is improved while lowtemperature characteristics are diminished. There are, however, specialty grade fluorocarbons that canprovide high fluorine content with low temperature properties. Chemical Resistance  Mineral oil and grease, low swelling in ASTM oil No. 1, and IRM 902 and IRM 903 oilsPhosphate esters  Non-flammable hydraulic fuels in the group HFDEngine oils  Silicone oil and grease  Mineral and vegetable oil and grease  Aliphatic hydrocarbons (fuel, butane, propane, natural gas)  Aromatic hydrocarbons (benzene, toluene)  Chlorinated hydrocarbons (trichlorethylene and carbon tetrachloride)  Fuels, also fuels with methanol content