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Bostec's revolutionary H-Seal are the most reliable, flexible and cost effective metal seals in existence. H-Seal™ provide an ultra high vacuum (UHV) seal that is particle free, impermeable to moisture and are interchangeable with elastomeric O-rings. Learn more about H-Seal ...

Guaranteed 100% reliable
Interchangeable with Elastomeric O-Rings
Cryogenic to 500+° C
Sizes from 0.300" to 14"
Available in Nickel, Aluminum, Copper



 
 

All Seals Incorporated
The Sealing Specialists
2110 S. Yale Street
Santa Ana, CA 92704
Phone: (714) 556-4931
Fax: (714) 557-3257

SEALS › O-Rings

Acrylonitrile-Butadiene (NBR)

Nitrile rubber (NBR), also know as Buna-N, is the general term for acrylonitrile butadiene terpolymer. The acrylonitrile content of nitrile sealing compounds varies considerably (18% to 50%) and influences the physical properties of the finished material.

The higher the acrylonitrile content, the better the resis¬tance to oil and fuel. At the same time, elasticity and resistance to compression set is adversely affected. In view of these opposing realities, a compromise is often drawn, and a medium acrylonitrile content selected. NBR has good mechanical properties when compared with other elas¬tomers and high wear resistance. NBR is not resistant to weathering and ozone.

  • Heat resistance
    Up to 100°C (212°F) with shorter life @ 121°C (250°F)
  • Cold flexibility
    Depending on individual compound, between -34°C and -57°C (-30°F and -70°F)
  • Chemical resistance
    • Aliphatic hydrocarbons (propane, butane, petroleum oil, mineral oil and grease, diesel fuel, fuel oils) veg¬etable and mineral oils and greases
    • HFA, HFB and HFC fluids
    • Dilute acids, alkali and salt solutions at low temperatures
    • Water (special compounds up to 100°C) (212°F)

Not compatible with

  • Fuels of high aromatic content (for flex fuels a special compound must be used)
  • Aromatic hydrocarbons (benzene)
  • Chlorinated hydrocarbons (trichlorethylene)
  • Polar solvents (ketone, acetone, acetic acid, ethylene-ester)
  • Strong acids
  • Brake fluid with glycol base
  • Ozone, weather and atmospheric aging

 

 

For immediate assistance - Call 800-553-5054
We can supply custom molded o-ring designs in any material and in virtually any shape or size. Send your drawings for quote or call to discuss product or material design perimeters with our engineering department.

 

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