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Gasket
Material
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When
fittings are installed on polyethylene plastic
storage tanks, a gasket is almost always
required to insure against leaks. Gaskets are made from several
different materials and the decision to use one kind over another
is based on the chemical resistance properties of the substance
that will be stored in the tank.
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The
following table is based on recommendations from gasket companies.
It is provided for your convenience only. Bailiff Enterprises
makes no guarantees or warranties regarding the correctness
of this information. Contact us directly for specific application
recommendations.
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| Property |
Nitrile
(Buna-N) |
Ethylene-Propylene
(EP) |
Fluoroelastomer
(Viton) |
| Tensile
Strength |
Fair-Good |
Good-Excellent |
Good-Excellent |
| Electrical
Properties |
Poor |
Excellent |
Good |
| Weather
Resistance |
Good |
Excellent |
Good |
| Ozone
Resistance |
Fair |
Excellent |
Excellent |
| Heat
Resistance |
Good
(225ºF) |
Excellent
(275ºF) |
Excellent
(400ºF) |
| Cold
Resistance |
Fair-Good
(-40ºF) |
Good-Excellent
(-55ºF)
|
Good
(-20ºF) |
| Steam
Resistance |
Good |
Good |
Good |
| Tear
Resistance |
Good |
Good |
Fair |
| Abrasion
Resistance |
Good |
Good-Excellent |
Good |
| Acid
Resistance |
Good |
Good-Excellent |
Good |
| Petroleum
Oil |
Excellent |
Poor |
Excellent |
| Flame
Resistance |
Poor |
Poor |
Good |
| Vegetable
Oil |
Good |
Good
(Most) |
Excellent |
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