Nitrile O Rings
NITRILE / NBR / BUNA N are different names for Acrylonitrile Butadiene Polymer . These are available in
Low – Medium – High – A.C.N content depending upon High / Medium / Low Temperature range of applications. We
offer O rings in Shore A hardness: 40-90A in Black and different Color.
General-purpose nitrile compounds with a 34% ACN content have a recommended temperature range of -40° to +225° F
(-40° to +107° C). The low temperature flexibility can be improved by reducing the ACN content. Nitrile compounds
with an ACN content of 18% to 20% remain flexible at temperatures down to -65° F (-54° C).
Nitrile compounds outperform most other elastomers due to high tensile strength, as well as excellent abrasion,
tear, and compression set resistance.
Nitriles also have very good aging properties under severe conditions. Because of the double bonds present in
the polybutadiene parts of the chemical backbone, nitrile compounds have poor resistance to ozone, sunlight, and
weathering. They should not be stored near ozone-generating electric motors or equipment.
Suitable performance in :
• Petroleum oils & fuels
• Silicone oils & greases
• Ethylene glycol
• Dilute acids
• Water (below 100° c)
Does Not Perform Well in:
• Aromatic hydrocarbons (benzene, toluene, xylene)
• Automotive brake fluid
• Halogen derivatives (carbon tetrachloride, trichloroethylene)
• Ketones (MEK, acetone)
• Phosphate ester hydraulic fluids
• Strong acids