}

NBR (Nitrile Butadiene Rubber)

Nitrile rubber (NBR) is the general term for acrylonitrile-butadiene copolymer. The ACN content can vary between

18% and 50%. While the acrylonitrile content is important, the resistance to oil and fuel is more so. Conversely, the

elasticity and compression set are not as good. The NBR has good mechanical properties and good wear resistance.

However, its resistance to atmospheric agents and the ozone is relatively low.

Chemical resistance

Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel)

Mineral oils and greases

Fire-resistant fluids (HFA, HFB and HFC)

Diluted acids, low-temperature alkaline and saline solutions

Water (up to +100°C max)

Compatibility issue

Fuels with high aromatic content

Aromatic hydrocarbons (benzene)

Chlorinated hydrocarbons (trichlorethylene)

Polar solvents (ketone, acetone, acetic acid, ethylene-ester)

Strong acids

Glycol-based brake fluids

Atmospheric and ozone agents

Temperature range

-30°C/+100°C

-40°C / +100°C with particular NBRs

Hardness

50 Shore A

60 Shore A

}

VMQ (silicone rubber: Methyl Vinyl Polysiloxane

Resistance to chemicals

Animal and vegetable oils and greases

Water for operation at an average temperature

Diluted saline solutions

Atmospheric and ozone agents

Compatibility issue

Superheated steam up to +120°C

Chlorinated hydrocarbons with a low molecular weight (trichlorethylene)

Aromatic hydrocarbons (benzene, toluene)

Atmospheric and ozone agents

Temperature range

-60°C/+200°C

Hardness

60 Shore A

65 Shore A

70 Shore A

EN-TETE CONTINU

EN-TETE CONTINU

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FACE SEALS - FLOATING SEALS

FACE SEALS - FLOATING SEALS

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