HNBR O-Rings

HNBR O-Rings are known throughout the industry as strong and durable. The material will retain its properties even after long-term use in heat, oil and chemicals.



HNBR O-Rings

An O-ring is a solid-rubber seal shaped like a doughnut or torus. When compressed between mating surfaces, O-ring blocks the passage of liquids or gases. At AS&P we have O-rings in a wide range of standard and non-standard sizes that are suitable for nearly all sealing applications.

We focus on long-term relationships based on trust, honesty, and communication. Whether you need specialized O-Ring seals or off-the-shelf standard O-Ring seals, we have all of them at competitive prices.



HNBR O-Rings Description

Hydrogenated Nitrile (HNBR) O-rings, also known as Highly Saturated Nitrile (HSN), are made of a synthetic polymer that is obtained by saturating the double bonds in nitrile butadiene segments with hydrogen. This special hydrogenation process reduces many double bonds in the main chains of NBR polymers. This process results in the superior heat, ozone, chemical resistance and mechanical characteristics of HNBR over standard Nitrile. HNBR o-rings are usually peroxide-cured but can also be sulfur-cured to improve flexible properties in dynamic systems. However, sulfur-curing reduces heat resistance and will result in an inferior compression set.

HNBR o-rings are preferable 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 diluted acids, bases, and salt solutions. HNBR o-rings are not preferable for use with chlorinated hydrocarbons, ketones, ethers, esters, and strong acids.



HNBR O-Rings Properties:

Extended temperature capabilities, enhanced chemical compatibility with new automotive fuels, excellent resistance to compression set and tear/abrasion.

Temperature Range:

The temperature range is -40°F to +302° F.

Recommended for:

Petroleum-based oils and fuels, Aliphatic hydrocarbons, Vegetable oils, Silicone oils and greases, Ethylene glycol, Dilute acids, bases, and salt solutions to moderate temperatures, water, and steam to 150ºC (300ºF)

Not Recommended for:

Chlorinated hydrocarbons, Ketones, Ethers, Esters, Strong acids


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