Nitrile rubber and fluororubber are two commonly used skeleton oil seal materials, each with its own advantages and disadvantages, 

suitable for different application scenarios. ‌

Characteristic comparison

Nitrile rubber (NBR): NBR has excellent oil resistance, wear resistance, and heat resistance, suitable for environments with a temperature 

range of -30 ° C to 120 ° C. It has good resistance to various lubricants, oils, and oil air mixtures, but is not suitable for phosphate hydraulic

 oils and gear oils containing extreme pressure additives

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2.

Fluorine rubber (FKM): Fluorine rubber has excellent resistance to high temperatures, oil, and chemical corrosion, making it suitable for 

high temperatures and harsh environments. It has a wider temperature range of use, reaching over 200 ° C, and has good resistance to 

most chemicals

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Application scenarios

Nitrile rubber: Due to its excellent wear resistance and oil resistance, NBR is commonly used in automobiles, construction machinery, 

and hydraulic systems, especially in environments that require resistance to hydraulic and lubricating oils

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2.

Fluorine rubber: Fluorine rubber is commonly used for sealing requirements in high-temperature environments, such as the aviation, 

aerospace, and petrochemical industries, due to its excellent high-temperature stability and chemical corrosion resistance

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Price and market situation

Nitrile rubber: NBR oil seals have a relatively low price and are suitable for large-scale production and general industrial applications

3.

Fluorine rubber: Fluorine rubber oil seals are relatively expensive, but due to their excellent performance, they are commonly used in

 special occasions with higher sealing requirements