Hydrogenated nitrile is a synthetic polymer
that results from the hydrogenation of nitrile rubber (NBR).
In this process the molecular "double bonds" in
the NBR primary polymer chain undergo a hydrogenation process
and there¬fore the term "hydrogenated nitrile"
(HNBR). The allow¬able temperature range extends to 149°C
(300°F) with short periods at higher temperature possible.
By following de¬sign guidelines effective sealing can
be achieved at -32°C (-25°F) for static applications.
For dynamic applications however, operating
temperatures are limited to above - 23°C (-10°F).
HNBR compounds possess superior me¬chanical characteristics,
particularly their high strength. For sealing applications
up to approximately 159°C (300°F), this is an advantage
as it prevents extrusion and wear.
Chemical resistance
• Aliphatic hydrocarbons.
• Vegetable and animal fats and oils.
• HFA, HFB and HFC fluids.
• Dilute acids, bases and salt solutions at moderate
tem¬peratures.
• Water and steam up to 149°C (300°F).
• Ozone, aging and weathering.
Not compatible with:
• Chlorinated hydrocarbons.
• Polar solvents (ketone and ester).
• Strong acids.
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