This special hydrogenation process reduces many double bonds in the backbone chains of NBR polymers. This process results in superior heat, ozone, chemical resistance and mechanical characteristics of HNBR compared to standard nitrile.

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HNBR O-rings are preferred for use with petroleum-based oils and fuels, aliphatic hydrocarbons, vegetable oils, silicone oils and greases, ethylene glycol, water and steam (up to 300ºF), and acids, bases, and dilute salt solutions . However, they are not preferable for use with chlorinated hydrocarbons, ketones, ethers, esters and strong acids.

Just like NBR, HNBR polymers have different acrylonitrile (ACN) contents which can range from 17% to 49%. Lower ACN content gives better low temperature properties but less resistance to polar fuels and lubricants. Higher ACN content gives poorer low temperature properties but improves resistance to polar fuels and lubricants. Standard HNBRs typically have 36% ACN content.

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• Serving temperature: -30°C / 150°C

• Standard hardness; 70 sh A

• Standard color Black (green on request)

• Standard AS/BS size O-rings

• Metric size O-ring

 

Compliance: FDA 21 CFR 177.2600 / USP Class VI / 3A