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Buna-N O-Rings
Buna O-rings are the most common o-rings on the market. Ideal for water or hydrocarbons (Oil & Gas), they are a staple in the industry.
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Buna-N (Nitrile) O-Rings
Nitrile butadiene rubber (NBR) is a family of unsaturated copolymers of 2-propenenitrile and various butadiene monomers (1,2-butadiene and 1,3-butadiene).The additives used to accomplish this are NOT always compatible with Buna-N and has resulted in the auto industry upgrading o-rings to Viton® elastomers.
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Nitrile®(NBR or Buna N)(Acrylonitrile-Butadiene Copolymers) Trade Names:
Chemigum.................................Goodyear
Hycar................................Zeon Chemical
Krynac..........................................Polysar
Ny Syn....................................Copolymer
Paracril........................................Uniroyal
Perbunan.......................................Mobay Compounds of these polymers are the backbone of the O-Ring line. Polymers vary from 18% to 50% acrylonitrile content. Resistance to petroleum products increases as acrylonitrile increases; conversely, low temperature flexibility decreases. Government specifications require low acrylonitrile. Nitrile® Compounds can exhibit excellent compression set, tear and abrasion resistance. Unless especially compounded, they do not have good resistance to ozone, sunlight, or weather. They should not be stored near motors or other ozone generating electrical equipment. They should be kept from direct sunlight. Compounds from nitrile rubber can exhibit a temperature range of -65oF to +300oF, although no one formulation may exhibit the total range. |
Media Compatibility
Petroleum Fluids
Water (to 212oF)
Silicone Fluids
Ethylene Glycol
General purpose
Non-Compatible
Phosphate esters
Ketones
Brake fluids
Strong acids
Ozone or weathering |
ORDER
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Item#/Size |
Material |
Price/each |
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AS 568-372Nitrile® |
Nitrile® |
$ 1.10 |
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AS 568-373Nitrile® |
Nitrile® |
$ 1.20 |
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AS 568-374Nitrile® |
Nitrile® |
$ 1.22 |
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AS 568-375Nitrile® |
Nitrile® |
$ 1.24 |
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AS 568-376Nitrile® |
Nitrile® |
$ 1.26 |
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AS 568-377Nitrile® |
Nitrile® |
$ 1.26 |
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AS 568-378Nitrile® |
Nitrile® |
$ 1.60 |
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AS 568-379Nitrile® |
Nitrile® |
$ 1.70 |
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AS 568-380Nitrile® |
Nitrile® |
$ 1.74 |
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AS 568-381Nitrile® |
Nitrile® |
$ 1.80 |
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AS 568-382Nitrile® |
Nitrile® |
$ 1.80 |
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AS 568-383Nitrile® |
Nitrile® |
$ 2.40 |
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AS 568-384Nitrile® |
Nitrile® |
$ 2.40 |
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AS 568-385Nitrile® |
Nitrile® |
$ 2.80 |
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AS 568-386Nitrile® |
Nitrile® |
$ 3.00 |
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AS 568-387Nitrile® |
Nitrile® |
$ 3.40 |
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AS 568-388Nitrile® |
Nitrile® |
$ 3.50 |
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AS 568-389Nitrile® |
Nitrile® |
$ 3.50 |
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AS 568-390Nitrile® |
Nitrile® |
$ 3.60 |
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AS 568-391Nitrile® |
Nitrile® |
$ 5.80 |
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AS 568-392Nitrile® |
Nitrile® |
$ 6.40 |
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AS 568-393Nitrile® |
Nitrile® |
$ 6.80 |
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AS 568-394Nitrile® |
Nitrile® |
$ 7.60 |
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AS 568-395Nitrile® |
Nitrile® |
$ 8.00 |
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