Buna Seals O'rings
Due to buna excellent resistance to petroleum products, and its ability to be compounded for service over a temperature range of -35°C to +120°C (-30°F to +250°F), Buna NBR is the most widely-used elastomer in the seal industry now.
Buna nitrile compounds do not possess good resistance to ozone, sunlight, or weather. They should not be stored near electric motors or other ozone generating equipment.
Buna orings should be kept from direct sunlight. However, this can be improved through compounding. Special low-temperature compounds are available for mineral oil-based fluids. By hydrogenation, carboxylic acid addition, or PVC blending, the nitrile polymer can meet a more specified range of physical or chemical requirements, that's why Buna orings is widely used in many applications.
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