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HNBR O Rings | HNBR Rubber O-Rings & Seals | Polymax India

Orings in HNBR


Hydrogenated nitrile is a synthetic polymer that results from the hydrogenation of nitrile rubber (NBR). This gives it superior mechanical characteristics, particularly high strength, greater thermal stability and helps reduce extrusion and wear.

Available with the following Approvals/Certifications. Please call for further information.

Temperature Range

  • Up to 190°C (Intermittant)
  • Down to -30°C

Recommended temperature range -30°C to +170°C

Chemical resistance

  • Aliphatic hydrocarbons
  • Vegetable and animal fats and oils
  • HFA, HFB and HFC hydraulic fluids
  • Dilute acids, bases and salt solutions at moderate temperatures
  • Water up to 149°C (300°F)
  • Ozone, aging and weathering

Not compatible with:
  • Chlorinated hydrocarbons
  • Polar solvents (ketones, esters and ethers)
  • Strong acids



Unfortunately these are not availble to buy online, Please phone us on 01420 474123 for availability