HNBR O-Rings

What is an HNBR O-ring?

HNBR (hydrogenated nitrile butadiene rubber) is obtained by fully or partially hydrogenating the double bonds in nitrile butadiene rubber with hydrogen to single bonds. In comparison with NBR O-rings, HNBR O rings have better properties in terms of oil resistance, temperature resistance, and strength. It is more resistant to ozone and aggressive substances and can be used from -40 °C to +165 °C (with peaks up to +190 °C).

The advantages of O-rings HNBR:

• Resistant to hydraulic fluids based on mineral oil
• Resistant to animal and vegetable fats
• Resistant to diesel, ozone, acid gas, diluted acids, and bases
• Resistant to new organic oils (organic oils)
• Suitable for high dynamic loads and has good wear resistance
• Mechanically strong
• Good compression set / good hot crack / good ozone and aging resistance
• Resistant to high-energy radioactive radiation
• Good resistance to hot water and steam
• Temperature resistant to long-term +150 °C with higher peaks
• Good resistance to various media
• Excellent heat and oxidation resistance
• Applicable in water and steam
• Temperature range from -40 °C to +150 °C
• Excellent resistance to liquids from motor vehicles (engine oil, coolant, fuel, etc.)

The disadvantages of HNBR Orings:

• Significantly more expensive
• Not resistant to chlorinated hydrocarbons
• Not resistant to polar solvents (ketones, eaters and esters)
• Not resistant to strong acids

Applications:

• Automotive

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