Is FKM and Viton the same?
These rubber compounds give exceptional heat resistance with compatibility across many fluids or chemical exposures. The most commonly known name for these compounds is “Viton,”™ which has become the generic name for all FKM polymers and rubber compounds.
What is FKM made of?
Type-4 FKMs are composed of propylene, TFE, and VDF. While base resistance is increased in type-4 FKMs, their swelling properties, especially in hydrocarbons, are worsened. Typically, they have a fluorine content of about 67 weight percent. Type-5 FKMs are composed of VDF, HFP, TFE, PMVE, and ethylene.
Is FKM a nitrile?
NBR seal. NBR is also called Nitrile or Nitrile rubber and stands for Nitrile Butadiene Rubber. If it is hydrogenated, it becomes HNBR (Hydrogenated Nitrile Butadiene Rubber). FKM and NBR are two commonly used elastomers for high-end sealing applications, and not without reason.
Is Viton low outgassing?
Fluorocarbons (Viton) perform relatively well, while Nitrile (Buna-N) has one of the higher outgassing rates. Typical initial degassing rates for Viton are reported to be close to 1 x 10-6 Torr-liter/cm2-s.
What FKM stand for?
Fluro-Elastomer
To set the record straight, here’s a rundown of what they are: FKM is the American standard ASTM short form name for Fluro-Elastomer. It is the designation for around 80% of Fluoro-Elastomers defined by ASTM D1418.
Is FKM FDA approved?
Fluorozone FDA Performance FKM is formulated for food and lab applications where FDA compliance is required. Made from FDA-approved ingredients per 21CFR 177.2600 including 100% virgin domestic-made premium Fluoroelastomer FKM polymer.
How can you tell the difference between nitrile and Viton?
The key difference between nitrile and Viton is that nitrile rubber compounds have comparatively a low density while Viton has comparatively a large density. However, by looking at the material, we can identify Viton by its appearance of green-brown colour where nitrile rubber has a yellow colour.
Is Viton good for hot water?
FKM Viton® rubber is attacked by amines, strong alkalis and many Freon’s. It also has limited resistance to steam, hot water, methanol, ketones, low molecular weight esters and nitro containing compounds like Skydrol, synthetic hydraulic fluids, certain esters and ethers.
Is FKM a Teflon?
Fluoroelastomer (FKM) rubber is a thermoset elastomer while Polytetrafluoroethylene (PTFE) is a thermoplastic. Both are fluorinated materials comprising of carbon atoms surrounded by fluorine atoms, which gives them incredible chemical resistance.
