NBR, Nitrile O-Rings & Seals
Nitrile rubber is the most commonly used elastomer for O-Rings and other seals. Also known as Buna N, Nitrile, NBR. NBR O-Rings have a high tensile strength and good resistance to scratches, cracks and pressure deformation. The material and production costs of nitrile rubber are low compared to other elastomers.
The recommended temperature range of nitrile rubber is between -40 and 108 °C. Special low temperature Nitrile rubber types can handle temperatures of -54 °C. Special high temperature Nitrile rubber types can be used up to 135 °C. It is important to know that nitrile rubber is poorly resistant to ozone, sunlight and weather influences. The Nitrile seals must not be stored in the vicinity of ozone-generating electric motors or equipment.
Typical products for nitrile rubber are: O-rings, hoses, gaskets, diaphragms and hydraulic hoses. Due to its oil and fuel resistance, NBR O-rings are commonly used in automotive, marine and oil and gas applications.
General properties NBR
-40 to 108 °C
30 / 40 / 50 / 60 / 70 / 80 / 90
Krynac® (LANXESS), Nipol® (Zeon Chemicals)
Nitrile, Buna-N, NBR
Black. Other colors on request.
NBR performs well in
- Petroleum oils & fuels
- Silicone oils & greases
- Ethylene glycol
- Dilute acids
NBR 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 (Skydrol®, Pydraul®)
- Strong acids
Typical NBR Applications
- Automotive, marine and aircraft fuel systems
- Shaft seals in oil applications
- Low temperature applications
- Hydraulic hoses
- Nitrile tubing
Certifications & compliances
Newdealseals offers a wide range of products & materials that are certified and/or in compliance with industry specific standards. Examples of certifications and compliances:
FDA CFR 21.177.2600 (A-D) Dry foods
FDA CFR 21.177.2600 (A-F) Fatty foods
EC 1935/2004 compliance
EC 2023/2006 compliance
BFR Class XV
USP class VI
NSF 61 section 6
Oil & Gas
DIN EN 549
Alternatives for NBR, Nitrile O-Rings & Seals
Do you want improved low temperature properties?
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