Is FKM equal to Viton?
Fluoro-Elastomer is usually referred to as FKM FPM or as VITON™ after the popular brand which produces it. You may see this rubber listed in different places with these different names, but they are all one and the same. Originally developed by Du Pont, it is produced by a number of companies around the world. FKM is an abbreviation of Fluorkautschukmaterial (i. All FKMs contain vinylidene fluoride as the common monomer, to which different other monomers are added for specific types and functionalities, fitting the desired application.FKM material is the ASTM designation for a class of fluorinated, carbon-based synthetic rubber, commonly known as FKM rubber or fluoroelastomer. Its impressive heat resistance allows FKM seals to withstand temperatures greater than 200°C.What is FKM (Viton®)? FKM (by ASTM D1418 standard) (equivalent to FPM by ISO/DIN 1629 standard) is the designation for about 80% of fluoroelastomers as defined in ASTM D1418. Fluorocarbon rubber is the most significant single elastomer.FKM (Fluoroelastomer) is a type of synthetic rubber known for its excellent resistance to chemicals, oils, and heat.Fluoroelastomer (FKM, commonly known as Viton®) is one of the most expensive rubber materials. Other costly rubbers include perfluoroelastomer (FFKM), fluorosilicone, and some specialty silicones. Their price comes from advanced chemical resistance, high heat tolerance, and complex production.
What is similar to Viton?
Viton and nitrile are similar materials, but they are not the same. Both Viton and Buna N rubber sheets retain resistance to oil, greases, and caustic chemicals; however, Viton is categorized as a fluoroelastomer while nitrile is not. Viton is characterized by its: Resistance to degradation by a greater variety of fluids and chemicals than any nonfluorinated elastomer. Excellent resistance to oils, fuels, lubricants, and most mineral acids. Extremely low permeability to a broad range of substances, including oxygenated automotive fuels.
Which is better, Viton or NBR?
Viton®/FKM also offers excellent resistance to oxidation, ozone, UV exposure, weather, fungus and mould. Although NBR also supports some of the same chemical resistances, it is much less universally resistant than its Viton®/FKM counterpart, suffering degradation from weather and ozone exposure. Metric FKM 75 ShA O-rings. Fluorocarbon Rubber. FKM O-rings have excellent chemical resistance and can be used at temperature range of between – 15°C and 200°C. Although generally more expensive than NBR (Nitrile) O-rings, FKM has found wide acceptance in the aircraft, automotive and chemical industries.The temperature range of Viton™ (FKM/FPM) is considered to be between -20°C and +205°C depending on the grade. It can take even higher or lower temperatures such as -30°C / -45°C and +230°C, but for short working periods. For further information regarding Viton™ O Rings visit our Material Properties page.
What is Viton not compatible with?
Do not use Viton with acetone, esters, amines, organic acids, acetic acid, MEK, ethyl acetate, highly polar chemicals, etc. Viton is generally serviceable in dynamic applications to temperatures of -18 to -23 °C. Special formulations permit its use in static applications down to -54°C. Both Viton and PTFE have their strengths, and which one is better depends on your specific application. Viton is excellent for flexible seals that need to resist oils and fuels, while PTFE is ideal for extreme chemical resistance and non-stick applications.HNBR is better for cost, elasticity, and dynamic sealing. Viton (FKM) is better for extreme heat, chemicals, and long-term stability. Neither is universally better; the choice depends on application.Disadvantages of Viton® Seals Performance-wise, Viton® isn’t ideal for every application. For instance, under excessively high temperatures (or fire), fluoroelastomers like Viton® decompose, often releasing hydrogen fluoride, which is toxic and associated with ongoing respiratory tract irritation.
What is better than Viton?
Buna is effective to 250°F. However, it can effectively seal mechanical objects at low temperatures to –22°F. Viton seals are rendered ineffective at temperatures below 5°F, with the material becoming hard and inflexible. Environmental conditions also differentiate the application of Buna vs. While also boasting some chemical compatibility, Buna is much less universally resistant than Viton as it can suffer degradation from weather and ozone exposure. For most circumstances, however, Buna offers superior abrasion and tear resistance, making it more suitable for heavy-duty industrial applications.
What is the alternative to Viton?
Viton alternatives like Buna-N, EPDM, and silicone rubber are commonly used in various industrial applications. Choosing the right one depends on the specific performance requirements. EPDM also retains excellent chemical resistance properties, allowing it to remain reliable materials in industrial settings. Because Viton is a fluorelastomer, it can withstand higher temperatures than an EPDM rubber roll; however, EPDM can withstand lower temperatures.