What is the Difference Between Nitrile and Viton?

Nitrile and Viton® are two commonly used elastomers with different properties and applications. Here are the main differences between them:

1. Chemical Resistance: Viton® is generally more resistant to a wider range of chemicals than Nitrile, including harsher chemicals and extreme conditions.
2. Temperature Range: Nitrile is effective within a temperature range of -30°C to 100°C. Viton®, on the other hand, can withstand higher temperatures.
3. Environmental Properties: Nitrile is not resistant to degradation from weather and ozone exposure, while Viton® is more resistant to external elements and harsh conditions.
4. Applications: Nitrile is commonly used for general-purpose applications requiring resistance to aliphatic hydrocarbons, petroleum oils, water, and hydraulic fluids. Viton® is often found in automotive, chemical, and appliance-processing industries.
5. Cost: Nitrile is generally less expensive than Viton®, with Viton® being approximately ten to fifteen times more expensive than Nitrile. However, the price can vary depending on special formulations of Nitrile.

When determining which material is best for your application, consider factors such as the operating temperature range, chemical exposure, environmental conditions, and budget. Nitrile is often better suited for applications involving petroleum-based lubricants and lower temperatures, while Viton® is more appropriate for harsher chemicals, higher temperatures, and weather resistance.

Comparative Table: Nitrile vs Viton

Here is a table comparing the differences between Nitrile and Viton:

Please note that Nitrile (NBR) is also known as Buna-N. Viton (FKM/FPM) is sometimes referred to as Fluorocarbon rubber.