Which is better VITON or Buna?

While both Viton and Buna seals both serve as great sealing options at moderate temperatures, Viton is far superior to Buna for high temperature applications. 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.

Is Viton and Buna the same?

Viton is the choice over Buna for high-temperature applications. Viton seals hold indefinitely at temperatures up to 400°F and can last up to 48 hours at temperatures up to 600°F. Buna is effective to 250°F. However, it can effectively seal mechanical objects at low temperatures to –22°F.

How can you tell Buna from Viton?

Buna N is oil and solvent resistant. Viton has high-temperature resistance and chemical resistance. Buna N has a temperature resistance up to about 120 °C. Viton has a temperature resistance up to about 300 °C.

What is the most durable O ring material?

Fluorocarbon (Viton®)

Offering outstanding chemical and high-temperature resistance, fluorocarbon O-rings are among the most durable and versatile available. They are particularly valuable in aircraft engines and automotive fuel handling systems because they resist swell in high-octane and oxygenated fuels.

Is Buna good for oil?

Nitrile, Buna-N or NBR rubber is a widely used elastomer, thanks in large part to its highly oil & fuel resistant properties and tensile strength.

The Viton Seal Difference

Is Viton OK for oil?

Viton Rubber Characteristics

A fluoroelastomer polymer, Viton rubber is known for its performance under high heat and corrosive environments. Exceptional in oil, fuel, and mineral acid applications, Viton is quite universally resistant, especially compared to Buna.

Is Viton good for oil?

Key Uses. Viton® and Buna o-rings are often used in similar applications. With resistance to oils and fuels, both materials are typically used in aircraft and automotive applications. However, since Buna offers great resistance to water, Buna o-rings are often used in marine applications as well.

Which O-ring is best?

What O-ring material is best for high pressure?

High-durometer o-rings are better suited for higher pressures and are more resistant to extrusion. Hard material yields higher pressure required to force the o-ring into extruding. The only drawback to a high durometer is the decreased squeeze of the o-ring.

What is Viton rubber used for?

Viton® is a brand name of DuPont for its synthetic rubber and fluoropolymer elastomer, commonly used in O-rings and other moulded or extruded products.

What is better EPDM or Buna?

Both materials are well suited for use in the -35 to 125°C range. EPDM has an advantage in lower temperatures and EPDM has an advantage in higher temperatures. Marco offers specific compound formulations extending these ranges even futher as can be seen in the following compound comparison chart.

Is Buna gas resistant?

Buna-N O-Rings

Buna O-rings have resistance to common lubricants and are recommended for crude oil, gasoline, propane, petroleum oils and water.

Is Buna and EPDM the same?

EPDM (Ethylene Propylene Diene Terpolymer) stretches the upper and lower boundaries for temperature when compared to Buna. EPDM is excellent for hot water and steam service up to 275°F (135°C). EPDM also keeps its flexibility in freezing temperatures (down to -55°F).

What is Buna seal?

Buna O-Rings (NBR, Nitrile)

Buna seals are standard in most pumps and work well for most cleaning and fluid pressurizing applications. This form of synthetic rubber is generally chemical-resistant, standing up to oil, fuel, and other harsh compounds.

What is the Buna?

Buna is a synthetic rubber, which is available in a wide range of products today. It was originally used exclusively in the tire industry. The trade name "Buna" stands for the starting materials butadiene and sodium (Natrium). The first commercial production plant for synthetic rubber started operation in 1937 at I.G.

Is Buna and nitrile the same?

Acrylonitrile Butadiene Rubber (NBR) or Nitrile rubber is one of the most popular compounds for automotive applications. 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.

Are Viton O-rings good?

The name Viton is a trademark, a bit like Hoover or Sellotape, and refers to fluorocarbon o rings, or FKM/FPM for short. This material has an excellent tolerance for high temperatures, resistance to oils, fuels and hydraulic fluids as well as aromatics and solvents.

Is Buna compatible with diesel?

it's one of the most highly used seal materials in the oil and gas industry.as long as your o-ring is the correct size,buna-n should hold up just fine to regular diesel fuel.

What is the highest temp o-ring?

PTFE O-Rings have the ability to handle temperatures of up to 250°C and offer chemical resistance to acids, alkalis and solvents. In actual fact, it also has the ability to withstand temperatures as low as -200°C.

What is a Buna-N O-ring?

Buna-N o-rings also referred to as NBR o-rings and Nitrile o-rings are the most widely used o-ring material in the word because of low cost, good mechanical performance with resistance to water, most basic oils, lubricants and some fuels, many pneumatic, hydraulic systems, and the default choice for basic applications.

What is the most common O-ring material?

Due to many applications, there is also a wide variety of O-ring material choices available. Nitrile (Buna), Neoprene, Ethylene Propylene (EPDM Rubber), Silicone, Fluorocarbon (Viton), and PTFE (Teflon) are among the most commonly used compounds for O-rings and seals.

What is the difference between Viton and nitrile?

The key difference between nitrile and Viton is that nitrile rubber compounds have comparatively a low density while Viton has comparatively a large density. However, by looking at the material, we can identify Viton by its appearance of green-brown colour where nitrile rubber has a yellow colour.

Is Viton good for diesel?

From its introduction in 1957, Viton has a long-proven resistance to a wide range of solvents and fuels. Since the mid 1990s, manufacturers have specified Viton for seals and gaskets for use in diesel fuel injectors because of its resistance to biodiesel fuels.

Is Buna a rubber?

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.