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Home > Viton > Permeation Resistance

Viton™ Resistance To Reduce Emissions

Viton Permeation Resistance Will Reduce Emissions

Even if high temperatures or aggressive fluids are not involved, Viton may be specified because it has good resistance to permeation. In automotive, chemical processing, and other industries, Viton FKM helps minimize fugitive emissions to meet Clean Air Act requirements.

Permeation Rates1 for Selected Elastomers and Nylon 122
Material
Fuel C
at 23ºC
90% Fuel C,
10% Ethanol
85% Fuel C,
15% Methanol
Toluene
at 40ºC
NBR (33% ACN)
669
1028
1188
-
HNBR (44% CAN)
230
553
828
-
Fluorosilicone
455
584
635
-
Nylon 12
5.5
24
83
-
Viton GLT
2.6
14
60
-
Viton AL
0.8
6.7
32
-
Viton A
0.8
7.5
36
49
Viton GFLT
1.8
6.5
14
-
Viton B
0.7
4.1
12
-
Viton GF
0.7
1.1
3.0
7

1 Average Permeation Rate for ASTM Standard (g x mm) (m2 x days)
2 Mathematically normalized to 1 mm thicknesses using data from tests described in ASTM E96-53T
Key: 1 = Excellent 2 = Fair to Good 3 = Poor 4 = Not Recommended

Next: Selecting the Type of Viton That Is Best For You

 

 

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