When engineers or maintenance specialists refer to Viton seals, Viton gasket, Viton o-rings, or FKM seals, they are all talking about a family of fluoroelastomers designed for demanding sealing applications. The material behind these products is commonly known as FKM material, also sometimes labeled as FPM in European standards.
What Is FKM Material?
FKM is a fluoroelastomer that contains a high percentage of fluorine. Its structure is based on vinylidene difluoride combined with other monomers such as hexafluoropropylene or tetrafluoroethylene. Depending on the exact composition, FKM can be tailored for better heat resistance, chemical stability, or flexibility at low temperatures. This versatility makes FKM one of the most reliable materials for sealing technology.
Key Properties of Viton and FKM Seals
Chemical resistance: Viton seals are highly resistant to fuels, oils, solvents, and aggressive chemicals.
Temperature resistance: The material can withstand continuous operation at temperatures up to 200–260 °C, depending on the compound.
Durability: FKM seals show excellent resistance to aging, ozone, and abrasion.
Low permeability: The dense fluorocarbon structure ensures minimal gas permeability.
Variety in hardness: Viton gasket materials are available in a wide range of hardness levels, making them adaptable for many sealing applications.
Applications of Viton Gaskets and O-Rings
Viton gaskets are often used in automotive, aerospace, chemical, and oil and gas industries, where contact with aggressive fluids and high heat is unavoidable.
Viton o-rings made from FKM material are critical in hydraulic systems, engines, pumps, and other equipment that requires reliable sealing under pressure and fluctuating temperatures.
Viton vs. FKM vs. FPM
The terms may sound confusing, but they all refer to the same type of elastomer:
- FKM is the ASTM designation.
- FPM is the ISO and DIN designation.
- Viton is the well-known trade name for a range of fluoroelastomer compounds.
- Every Viton product is an FKM, but not every FKM compound is Viton.
Why Choose Viton Seals?
The combination of chemical resistance, temperature stability, and durability makes Viton seals and FKM seals indispensable for critical industries. Whether in the form of a Viton gasket or Viton o-rings, these components deliver long-lasting performance and reduce the risk of leaks, breakdowns, and costly downtime.
