Nitrile O Rings (NBR)
The UK’s largest selection of Nitrile O Rings (NBR)
M Barnwell Services’ range of Nitrile O Rings (NBR O Rings) offers good mechanical properties and resistance to mineral oil-based lubricants greases, and fuels. They are available in a wide variety of shore hardness and specialist compounds.
We have over 50 million O Rings and Back-Up Rings in stock servicing many industries. These include Water, Pump and Gas, Agriculture, Food and Drink, Rail, Automotive and Bus Truck and Trailer.
About Nitrile O Rings and its Features:
Nitrile elastomer (NBR), the comprehensive term for Acrylonitrile Butadiene Copolymer, stands out as a cost-effective and widely utilised material. Nitrile O Rings, typically available in standard black with a hardness ranging from 40 to 90 Shore A, have proven durability. They exhibit resilience in temperatures spanning from -40°C to +135°C (with intermittent/compound-specific capabilities reaching up to +150°C). Tailoring is possible for temperatures as low as -65°C and up to +120°C (for low-temperature applications).
These elastomers consist of varying ratios of the copolymer butadiene and acrylonitrile. Compounds with approximately 32% Nitrile (ACN) content, known as “Medium Nitrile,” enjoy significant popularity. On the other hand, compounds with around 50% Nitrile (ACN) content are termed “High Nitrile” and are particularly recommended for applications involving Hydrocarbon fuels. Conversely, compounds with roughly 18% Nitrile (ACN) content, labeled as “Low Nitrile,” find their niche in low-temperature applications.
Key Uses of Nitrile O Rings:
Marine, aircraft, and automotive fuel structure, off-road equipment, oil-resistant applications of all types, and low-temperature military uses. Furthermore, it can be compounded to Hygienic FDA applications. Nitrile combines superb resistance to petroleum-based oils and fuels, hydraulic fluids, water, alcohol, and silicone greases. It also presents a great balance of working properties such as a low compression set, high abrasion resistance, and high tensile strength.
Limitations:
Nitrile O Ring compounds are, however, confronted by a slight quantity of Ozone. A commonly used compound in Nitrile rubber is a phthalate-type plasticizer that can migrate out and generate issues with some plastics. In addition, new regulations on some phthalates have limited their use.
For further details about Nitrile (NBR) O Rings visit our Material Properties page.
If you would like more information about our range, download our catalogue, see Nitrile Comparison Chart, or contact a member of the team.
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