Is Buna N the same as Viton?

Viton and Buna are two of the most commonly used elastomers for sealing applications and for good reason. Viton seals provide an indefinite seal for temperatures up to 400°F, and for temperatures up to 600°F they offer an excellent seal for more than 48 hours. Buna on the other hand is only effective up to 250°F.

What is Buna material?

Nitrile rubber — also known as acrylonitrile butadiene rubber, NBR, or Buna-N — is a synthetically produced, petroleum-based rubber ideal for seals, gaskets and o-rings. Nitrile is a highly versatile rubber. It is used in countless applications and products, from marine fuel systems to small engine carburetors.

Who makes Buna rings?

Precision Associates, Inc.
Precision Associates, Inc. Manufacturer of Buna N O-Rings. UL, FDA, 3-A, non-black, fuel resistant, water resistant, internally lubricated & other specialized materials available.

What is the best O ring material for gasoline?

Buna (Nitrile or NBR) O-rings: general purpose sealing Buna O-rings, also known as nitrile or NBR O-rings, offer excellent sealing and mechanical properties at a low cost. Buna O-rings have resistance to common lubricants and are recommended for crude oil, gasoline, propane, petroleum oils and water.

What are Viton O rings used for?

Viton® O-rings (FKM O-rings) have low gas permeability and are commonly used as gaskets in fuel system sealing applications. Other fluorocarbon compounds can also offer improved resistance to acids, fuels, water and steam.

Why is it called Buna-N?

It also is well known as Buna-N. This name came from one of the first base polymers patented in 1934, therefore people commonly use this name for all classes for Nitrile to this day. As the Acrylonitrile increase the polymer will have greater oil and fuel resistance.

Are Viton O-rings fuel resistant?

Viton® O-rings from Parker offer excellent resistance to high temperatures, ozone, oxygen, mineral oil, synthetic hydraulic fluids, fuels, aromatics and many organic solvents and chemicals—making it excellent for O-ring, gasket and seal materials.

Are Viton O rings better?

Crucial Differences While both materials are suitable for moderate temperature applications, Viton® is the superior choice for high temperatures. Viton® standard compounds can withstand temperatures up to 446℉, while Buna o-rings can only handle up to 257℉.

What O rings are good for fuel?

What are the Buna N and Buna’s rubbers?

Buna – N. Buna – N is a copolymer of 1, 3−butadiene and acrylonitrile. It is also called Nitrile rubber(NBR).It is obtained by polymerization of 1,3-butadiene & acrylonitrile in the presence of sodium .It is used for making oil seels,manufacturing of tank linings,protective gloves etc. Buna − S. Buna – S is a copolymer of 1, 3−butadiene and styrene.

What is Buna O ring?

Buna O-Rings. Nitrile butadiene rubber ( NBR ), which is also widely known as acrylonitrile butadiene rubber or Buna-N (hence Buna O-Rings), is a synthetic rubber copolymer made up of — you guessed it — butadiene and acrylonitrile .

What is Buna N?

Buna N is the commercial name for nitrile rubber/ NBR. Viton is the commercial name for fluoroelastomer. Monomers used in Manufacturing. Acrylonitrile and butadiene are used to manufacture Buna N. Vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene are used to manufacture Viton.