What is another name for Viton?
Fluoroelastomer, FKM, FPM, and Viton® are all different names for the same synthetic rubber material family. The standard grade for Viton™ is A grade, which has 66 percent fluorine content and is most commonly used in o rings and seals. Viton™ B offers better fluid resistance and Viton™ F is particularly good for resistance to fuel permeation.The Viton™ A-type family of fluoroelastomers are dipolymers comprised of hexafluoropropylene (HFP) and vinylidene fluoride (VF₂). They are used in a wide range of extrusion, injection molding, and solution coating applications, and some grades act as effective curing chemicals and metal adhesion promoters.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.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.Viton® 90 is a fluoroelastomer known for its excellent chemical resistance and ability to withstand high temperatures. Its AED rating makes it ideal for applications in aggressive environments, such as oil and gas exploration, where exposure to harsh chemicals like hydrogen sulfide (H₂S) and hydrocarbons is common.
What is Viton Grade G?
WCR Viton™ G is a peroxide cured Fluorocarbon Rubber (FKM), comprised of Viton™ GF-S polymer. It has excellent resistance towards concentrated acids, surpassing VITON™ B. Hardness 80 Shore A . Viton or FKM offers exceptional resistance to all lubrication oils, hydraulic fluids and grease with the exception of phosphoric ester. Suitable for use in working temperatures between -10°C to +180°C.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.Viton has excellent resistance to atmospheric oxidation, sunlight and ozone. After 20 years of exposure to direct sunlight, o-rings and seals of Viton showed no traces of cracking.Viton is generally regarded as one of the more fire-resistant rubber compounds available. It’s tremendous heat resistance and low burning characteristics make Viton inherently more resistant to flame and combustion caused by high temperatures than other, non-fluorinated hydrocarbon rubbers.Ketones: This category includes acetone and methyl ethyl ketone (MEK), which cause Viton® to swell and lose its structural integrity. Low Molecular Weight Organic Acids: Formic acid and acetic acid can break down Viton®, reducing its effectiveness in sealing applications.
What attacks Viton?
Acetone, Methyl, Organic Acids Despite Viton ® being super resilient against almost anything that is thrown at it, it does have a few disadvantages that could easily damage or destroy the material. Any type of ketones like acetone, ethyl-based acetate, amines, and any sort of organic acids. Viton GF is more chemically resistant than Viton A and offers good steam resistance. However, it should not be used with most ketones and esters.
How many types of Viton are there?
There are four major families of Viton™ fluoroelastomers: A, B, F, and ETP, each with its own unique performance characteristics. A major differentiator between the Viton™ product families is fluid resistance, which is based on the polymer’s fluorine level. To this day, that material is now used in a number of other industries, including the automotive, appliance, and chemical and fluid industries. Originally trademarked by DuPont (now the Chemours Company), Viton® is now a generally accepted generic term for a brand of fluroelastomer called FKM.VC-1A and VC-3 are widely used to cure the A, B, and E types of Viton™ fluoroelastomer. The main difference between the Viton™ curing agents is in processing safety. VC-1A gives the least processing safety, while VC-3 gives the best and, at the same time, exhibits some plasticizing effect.
What are the disadvantages of Viton?
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. Viton (FKM)®, known for its high heat resistance, can last over a decade in applications involving high temperatures. Silicone seals, popular for their flexibility and temperature resistance, can last over 10 years in the right conditions.Viton Temperature Rating This elastomer is known for its stability and composition in the presence of high temperatures. Viton seals can provide an indefinite seal for temperatures up to 400°F and an excellent seal for up to 48 hours at temperatures up to 600°F.Viton® O-Rings offer exceptional resistance to harsh chemicals and temperatures up to 400°F. With one of the strongest seals of any material, Viton® O-Rings are key in industries where reliability is non-negotiable–including automotive, chemical processing, fuel and oil, and aerospace.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.