Copied 240 Quad Ring (X-Ring), 3-3/4ID x 4OD, 70 Duro, Round, Black
240 Quad Ring (X-Ring), 3-3/4ID x 4OD, 70 Duro, Round, Black
Nitrile rubber, also known as NBR or Buna N, is one of the most commonly used sealing elastomers due to its resistance to petroleum-based fuels and lubricants and its relatively low price. Nitrile elastomers are copolymers of acrylonitrile and butadiene. There are a number of common variations of nitrile compounds. Acrylonitrile Content: The acrylonitrile (ACN) content of the polymer chains can be varied from 18% to 50%. Lower ACN content gives better low-temperature properties but poorer fuels and polar lubricants. Higher ACN content gives poorer low-temperature properties but improved fuels and polar lubricants resistance. Standard NBRs typically have 34% ACN content.Cure system: Sulfur-curedStandard Nitriles are usually sulfur-cured. Sulfur-cured compounds offer better low-temperature properties but are more prone to hardening with high temperatures.Peroxide-cured nitriles have better heat resistance and lower compression sets but are more expensive and more difficult to process.Temperature Range: Standard Low Temp: -40 C (-40 F)Standard High Temp: 100 C (212 F).
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