Why FPM, FKM, Viton, and Fluorocarbon – Different Names, One Material? How to Choose the Right O-ring

In the world of technical seals like O-rings, you will encounter various names for the same material: FPM, FKM, Viton, and Fluorocarbon. Although these names may seem different, they all refer to the same type of elastomer – fluoroelastomer – which has become the standard for applications requiring high resistance to heat, chemicals, and harsh environmental conditions.

Understanding the Terminology: FPM, FKM, Viton, and Fluorocarbon

Each of these names originates from different standards and manufacturers:

• FPM: The European designation used in DIN/ISO standards, referring to fluoroelastomer.
• FKM: The ASTM designation used internationally, most commonly in the USA.
• Viton: The brand name introduced by DuPont (now Chemours), still one of the most recognized names in the industry.
• Fluorocarbon: A general term often used in technical descriptions to refer to this elastomer.

Where Should You Use FPM/FKM/Viton O-rings?

Fluoroelastomers are known for their durability under extreme conditions, making them ideal for use in:

• Chemical Industry: Their resistance to aggressive substances like acids, solvents, and hydrocarbons makes them a top choice.
• Automotive: Viton O-rings are widely used in engine seals and fuel systems due to their ability to withstand contact with oils and fuels.
• Hydraulic Systems: FPM and FKM are excellent for high-pressure seals in industrial installations and machinery where extreme conditions are present.
• Aerospace and Aviation: These industries require durable materials that can maintain their properties even under the harshest conditions.

Why Is the Naming So Confusing?

The various names can confuse customers. Manufacturers may use different names for marketing or standardization reasons, but in reality, FPM = FKM = Viton. Understanding this can help clear up any concerns about compatibility when selecting the correct product.

How to Choose the Right O-ring?

When selecting an O-ring, it’s essential to have detailed technical information about:

• Temperature Range: FPM and Viton O-rings can handle temperatures from -20°C to +200°C, making them suitable for high-temperature applications.
• Chemical Resistance: FPM/FKM O-rings are a top choice for applications that involve contact with chemicals, acids, and hydrocarbons.
• Working Environment: Fluoroelastomers are also effective in outdoor applications where exposure to UV radiation, ozone, and atmospheric conditions is common.

Avoiding Mistakes When Purchasing O-rings

1. Check Specifications: Ensure you understand the application’s requirements. Not all FPM or Viton O-rings are suitable for every situation—details may vary depending on the blend.
2. Compare Prices: Sometimes, differences in brand names can lead to variations in price, even though it’s the same material.
3. Consult with Experts: At simmering.pl, you can find a wide selection of O-rings, and the experts can help you choose the best solution for your project.

Conclusion

Choosing the right O-ring doesn’t have to be complicated if you understand the naming conventions. Whether called FPM, FKM, Viton, or fluoroelastomer, the core properties remain the same. Knowing the specifics of your application is key to achieving the best result and ensuring the longevity of the seal.

Don’t be confused by the names – choose high-quality products like those offered at simmering.pl and enjoy the reliability of your technical seals.

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FAQ:

1. What is the difference between FPM and Viton O-rings?
FPM and Viton are the same material. Viton is the brand name, and FPM is the ISO designation.

2. Are Viton O-rings suitable for high temperatures?
Yes, Viton O-rings can withstand temperatures up to 200°C, making them ideal for high-temperature applications.

3. Where are FPM/FKM O-rings used?
They are used in the chemical industry, automotive sector, aerospace, and hydraulic systems due to their resistance to chemicals and high temperatures.