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Seal Sheet |
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| Fluorine plastic Plate |
| This is a class of synthetic rubber designed for very high temperature operation. FKM provide extraordinary levels of resistance to chemicals, heat and oil, while providing useful service life above 200°C. FKM are not a single entity but a family of fluoropolymer rubbers. Fluoroelastomers or FKM can be classified by their fluorine content, 66%, 68%, & 70% respectively. This means that FKM rubber having higher fluorine content have increasing fluids resistance derived from increasing fluorine levels. |
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Properties of Fluoroelastomers (FKM)
- They have excellent resistance to chemical attack by oxidation, by acids and by fuels.
- They have good oil resistance.
- They have limited resistance to steam, hot water, methanol, and other highly polar fluids.
- The outstanding heat stability and excellent oil resistance are due to the high ratio of fluorine to hydrogen, the strength of the carbon-fluorine bond, and the absence of unsaturation.
- The latest FKM polymers have a much broader fluids resistance profile than standard fluoroelastomers.
- They are able to withstand strong bases and ketones as well as aromatic hydrocarbons, oils, acids, and steam.
- Peroxide cured fluoroelastomers have inherently better water, steam, and acid resistance.
Application
FKM provides premium, long-term reliability even in harsh environments. A list of its applications is given below:
- Aerospace
- O-ring seals in fuels, lubricants
- Valve stem seals
- Fuel hoses
- Fuel Injector O-rings
- In tank and quick connect
- Flue duct exp. Joints
- Valve liners
- Roll covers
- Sheet stock/cut gaskets
- Automotive
- Shaft seals
- Check valve balls
- Diaphragms
- Military flare binders
- Electrical connectors
- Tire valve stem seals
- Clips for jet engines
- Lathe cut gaskets
- Industrial
- Hydraulic o-ring seals and hydraulic systems
- Manifold gaskets
- Fuel tank bladders
- Firewall seals
- Engine lube siphon hose fuel system seals
Gaskets (valve & manifold)
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