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NBR Oring

NBR Aging Resistant O Rings

NBR Aging Resistant O Rings

Black NBR Aging Resistant Rubber O Rings Excellent abrasion-resistance, oil & fuel-resistance, good gas impermeability resistance We can produce according to your samples or drawing/files....
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Black NBR Aging Resistant Rubber O Rings

Nitrile, also commonly referred to as Buna-N or NBR, is a copolymer of Acrylonitrile and Butadiene.


NBR O rings Service Temperature Range*


–31°F (–35°C) to 230°F (110°C) 

Specialty formulations, Low Temperature: –76°F (–60°C) 

Specialty formulations, High Temperature: 275°F (135°C).


Buna-N is a copolymer of Acrylonitrile and Butadiene. Nitrile is the most commonly used elastomeric material for molded and extruded products. This material offers relative low cost, good mechanical properties, and resistance to many common oils, fuels and lubricants. NBR has poor resistance to weathering, sunlight and ozone so it is best used in enclosed environments where parts are not exposed to the elements.


Buna-N O-Rings Chemical Compatibility and Resistance:

Petroleum greases, mineral oils, vegetable oils

Aliphatic hydrocarbons

Hydraulic fluids (HFA, HFB, HFC types)

Limited resistance to dilute acids, alkalis, and solvents

Buna-N O-Rings Not Compatible With:

Highly Aromatic fuels and hydrocarbons

Weathering, sunlight and ozone

Chlorinated hydrocarbons

Polar solvents

Glycol brake fluids

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