Metric Viton®/FKM O-rings are high heat and chemical resistance. Commonly used in fuel and petroleum oil applications. FKM or Fluorocarbon elastomers have excellent resistance to high temperature and low compression. They resistant to ozone, high temperatures, oxygen, mineral oil, synthetic hydraulic fluids, fuels, aromatics and many organic solvents over a temperature range of -25°F to +400°F.
Generally speaking, with increasing fluorine content, resistance to chemical attack is improved while low temperature characteristics are diminished. There are, however, specialty grade fluorocarbons that can provide high fluorine content with low temperature properties.
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