Material :
FKM
Size :
Various sizes or customized
Color :
Black, green,browm..etc
Function :
Sealing
Technology :
mould pressing
Hardness :
25A~95A
详情
FKM O-Ring and seal performance cost benefit
makes it the second most popular sealing material. Fluoroelastomer
(FKM) offers a wide range of resistance to chemicals, oil and heat,
with situational service life above 200°C. The outstanding heat
stability and excellent resistances are due to the high ratio of
fluorine to hydrogen, the strength of the carbon-fluorine bond, and
the absence of unsaturation. FKM compounds are widely used in
chemical, automotive, aerospace and industrial applications.
Fluoroelastomers are referred to generically as FKM polymers per
the nomenclature noted in ASTM
D1418. Features Of FKM
O-Rings:
Situational service life above
200°C
Excellent resistance to acids, fuels, mineral
and vegetable oils and greases, aliphatic, aromatic and chlorinated
hydrocarbons, non-flammable hydraulic fluids (HFD) and many organic
solvents and chemicals.
Excellent resistance to aging and
ozone.
Low
gas permeability, low compression
set.
Limitations of FKM
O-Rings:
Ketones (MEK,and Acetone) and Skydrol
fluids.
Amines
and Anhydrous Ammonia.
Low
molecular weight esters and ethers. Hot hydrofluoric or
chlorosulfonic acids and low molecular weight organic acids (formic
and acetic acids).