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An O-ring NBR is a versatile sealing ring made from nitrile butadiene rubber (NBR), a synthetic rubber known for its excellent resistance to oils, fuels, and other petrochemical substances. NBR O-rings provide reliable performance over a wide temperature range of -40°C to +120°C. These rings are ideal for applications in the automotive, aerospace, and oil and gas industries, where they offer effective sealing in hydraulic and pneumatic systems. Want to learn more? Explore the full details below.
NBR O-rings with a hardness of 55 Shore A are flexible and suitable for temperatures from -30 °C to +135 °C. They offer strong mechanical properties, low gas permeability and excellent resistance to mineral oils, greases, hydraulic fluids and water up to 80 °C.
NBR O-rings with a hardness of 60 Shore A are suitable for temperatures from -30 °C to +135 °C. They offer good mechanical properties, wear resistance and low gas permeability. The material is highly resistant to mineral oils, greases, hydrocarbons, hydraulic fluids and water up to 80 °C.
NBR O-rings with a hardness of 70 Shore A have a temperature range of -30 °C to +135 °C. They offer excellent mechanical properties, wear resistance and low gas permeability. With strong resistance to mineral oils, greases, hydrocarbons and hydraulic fluids, they meet DVGW and EN549 standards, making them ideal for gas and oil sealing applications.
These NBR O-rings with a hardness of 70 Shore A are FDA and NSF61 certified and suitable for temperatures ranging from -30 °C to +135 °C. They combine good mechanical properties and wear resistance with excellent resistance to oils, greases, hydraulic fluids and water up to 80 °C. Ideal for applications in food, drinking water and technical industries.
NBR O-rings with a hardness of 80 Shore A are suitable for applications between -30 °C and +135 °C. They offer high wear resistance and low gas permeability. The material provides excellent resistance to mineral oils, greases, hydrocarbons, hydraulic fluids and water up to 80 °C, making it ideal for heavy-duty industrial sealing.
NBR O-rings with a hardness of 90 Shore A are suitable for applications from -30 °C to +135 °C. They offer maximum rigidity and wear resistance, with low gas permeability. The material has excellent resistance to mineral oils, greases, hydraulic oils and water up to 80 °C, ideal for heavy-duty industrial sealing.
NBR (Nitrile Butadiene Rubber) is a synthetic elastomer known for its excellent resistance to oils, greases, and fuels. Its mechanical properties, flexibility and broad temperature range (-30°C to 120°C) make the O-ring NBR one of the most widely used seals in various industries. This material offers a perfect balance between durability, price, and chemical resistance. It is used in hydraulic systems, pneumatics, fuel lines, and HVAC installations. However, the NBR O-ring has limited resistance to ozone and UV radiation. Nevertheless, the O-ring NBR remains one of the most popular sealing solutions due to its versatility and reliability across a wide range of industries.
The O-ring NBR, also known as a nitrile o ring, is a synthetic elastomer produced by the copolymerization of butadiene and acrylonitrile. This entire process results in a material that is strong and flexible. It also makes the material resistant to oils, greases, and hydrocarbons. The acrylonitrile content can vary from 18% to 50%. A higher content improves oil resistance but reduces flexibility. Thanks to the double bonds in the polymer structure the NBR O-ring can be vulcanized with sulfur, enhancing its mechanical strength and wear resistance. These characteristics make the nitrile butadiene rubber O-ring widely used in seals, hoses, and industrial materials. Despite its limited resistance to ozone and UV the O-ring NBR remains a top performer in many industrial applications.
The O-ring NBR is a synthetic copolymer of butadiene and acrylonitrile obtained through copolymerization. The acrylonitrile content, which can range from 18% to 50%, directly influences the rubber's properties. A higher acrylonitrile content increases resistance to oils and fuels but reduces flexibility at low temperatures. Vulcanization with sulfur further strengthens the material. The final product is an elastic and wear resistant material. These features make the O-ring NBR the right choice for industrial use. As a nitrile butadiene elastomer it provides both resilience and value.
The O-ring NBR is also known for its chemical and mechanical performance. It offers high resistance to oils, greases, and hydrocarbons making it a preferred choice in industrial sectors. The O-ring NBR features excellent wear resistance, tensile strength and compression set resistance. These qualities contribute to a long service life. With a temperature range of -30°C to 120°C this nitrile o ring remains flexible and dependable. It strikes a good balance between quality, performance and cost.
O-ring NBR products offer many advantages, making them a popular choice in industrial applications. One of their key strengths is their resistance to oils, greases, and fuels, making them ideal for machinery and hydraulic systems. The NBR O-ring has a functional temperature range from -30°C to 120°C, allowing it to perform under different conditions. It is wear resistant, has high tensile strength and maintains sealing integrity even under high pressure. The O-ring NBR is cost-effective and readily available in various sizes and shapes. Despite limited resistance to ozone and UV it remains a solid choice for uses where mechanical strength and oil resistance are essential.
The O-ring NBR is particularly known for its exceptional resistance to oils, greases, and hydrocarbons. This makes it ideal for use in oil and fuel systems. Thanks to the acrylonitrile content in its composition, the nitrile butadiene rubber O-ring offers strong resistance to mineral oils, lubricants, and fuels. As a result, it is indispensable in hydraulic systems and industrial machinery. Even after prolonged exposure to oil-based fluids, the O-ring NBR retains its flexibility and sealing capability making it a durable sealing solution.
The O-ring NBR offers good wear resistance and mechanical strength, which translates into long-term performance even under tough conditions. Thanks to its high tensile strength and resistance to compression set it can withstand heavy loads and friction without wearing out quickly. This makes the O-ring NBR perfect for dynamic use in hydraulic and pneumatic systems. The nitrile o ring maintains both flexibility and sealing quality during prolonged use, ensuring reliability in industrial environments.
With a temperature range of -30°C to 120°C the O-ring NBR performs reliably in both hot and cold environments. It’s a great choice for the hydraulic and industrial sectors, where temperature fluctuations are common. These seals retain their flexibility and sealing power even at higher temperatures. Although they are less resistant to extreme heat, their mechanical characteristics ensure durability and effective sealing.
The O-ring NBR is a budget friendly choice for many industries. Its relatively low production cost and availability provide a great price-performance ratio. O-ring NBR seals are widely used in hydraulic and industrial sectors, where reliable and cost-efficient sealing is crucial. They’re suitable for pneumatic installations and industrial machines due to their oil resistance, wear resistance, and mechanical properties. This makes the nitrile butadiene O-ring an ideal choice when performance and affordability are both required.
The O-ring NBR is a commonly used seal in a variety of industries. Thanks to its resistance to oils, greases, and hydrocarbons. It’s a reliable choice for use in hydraulic systems. It serves as a safe sealing component in cylinders and valves. O Ring NBR seals are also frequently used in pneumatic installations, industrial machines, and pumps to prevent leakage and maintain efficiency. In HVAC systems (heating, ventilation, and air conditioning) the O-ring NBR is chosen for its resistance to oils and coolants. In the construction sector it’s applied in piping and structural sealing. Its durability, wear resistance, and cost-effectiveness keep it popular across many sectors.
O-ring NBR plays a key role in hydraulic and pneumatic systems. It ensures reliable sealing even under high pressure and fluctuating temperatures. Thanks to its oil resistance and durability the O Ring NBR is used in hydraulic cylinders, valves, and pumps to prevent leakage and improve machinery efficiency. For pneumatic use such as compressors and air pressure systems, the nitrile o ring offers solid sealing against gases. Its mechanical strength and affordability make it a go-to choice in industrial applications.
O-ring NBR is also widely used in HVAC systems (heating, ventilation, and air conditioning) thanks to its excellent resistance to oils, coolants, and sealants. It ensures reliable sealing in pipes, valves, and compressors helping maintain the efficiency of these systems. Additionally, O-ring NBR is applied in pumps and industrial machinery where it resists continuous pressure and friction. Its durability, wear resistance and low cost make it a staple in industrial sealing.
While O-ring NBR offers many advantages there are also some limitations. These seals have limited resistance to ozone, UV radiation, and weather conditions making them less suitable for outdoor use. Extended exposure to sunlight can weaken the material and reduce service life. O-ring NBR is also vulnerable to certain chemicals including strong acids, solvents, and halogenated hydrocarbons. Its temperature limit is another concern. At temperatures above 120°C the material can harden and lose sealing capability. If weather and chemical resistance are key, alternative materials such as EPDM and FKM (Viton®) are better suited.
O-ring NBR is not ideal for outdoor applications due to its limited resistance to ozone, UV light, and general weathering. Prolonged exposure can cause hardening, cracking, and deterioration reducing the service life significantly. For outdoor use or continuous UV exposure, EPDM is a recommended alternative thanks to its weather resistance and durability.
Although O-ring NBR performs well against oils, greases, and hydrocarbons, it is less resistant to aggressive chemicals. It does not hold up well against strong acids, halogenated hydrocarbons, ketones, or solvents. This limits its use in the chemical and pharmaceutical industries. If high chemical resistance is required, FKM (Viton®) is the better choice thanks to its performance under aggressive chemical and high-temperature conditions.
O-ring NBR has a maximum temperature resistance of 120°C making it unsuitable for extreme heat. Above this threshold the material can harden, become brittle, and lose its sealing ability. For applications requiring temperatures beyond 120°C, FKM (Viton®) O-rings are more suitable as they can withstand up to 200°C without losing elasticity.
Although O-ring NBR is versatile, there are cases where it falls short. In high temperature or chemically aggressive environments FKM (Viton®) O-rings are a better solution. They can withstand over 200°C and resist fuels, solvents, and acids. For outdoor and weather exposed environments, EPDM O-rings are ideal due to their superior resistance to ozone, UV radiation, and moisture. Silicone O-rings are another alternative when flexibility at low temperatures and a broad temperature range are needed. Choosing the right material increases sealing effectiveness and extends lifespan.
EPDM O-rings are better suited than O-ring NBR for outdoor and water applications. Thanks to their high resistance to ozone, UV radiation, and weathering. They retain flexibility and sealing performance even after long exposure to sunlight and moisture. They are a top choice for construction, HVAC, and piping systems. They resist water, steam, and certain chemicals making them reliable for demanding environments.
If you need a seal for extreme conditions involving high temperatures and harsh chemicals, FKM (Viton®) is a better option than O-ring NBR. Unlike O-ring NBR, FKM seals can withstand temperatures over 200°C without loss of elasticity or integrity. They resist fuels, solvents, acids, and halogenated hydrocarbons making them ideal for chemical installations and industrial processes. Thanks to their durability and long service life the FKM O-rings offer a highly reliable sealing solution.
The O-ring NBR is one of the most widely used seals in the industry, thanks to its excellent oil resistance, wear resistance, and affordability. You’ll often find the O Ring NBR in hydraulic systems, pneumatics, HVAC installations, and industrial machines. It offers reliable sealing against oils, greases, and fuels. With a temperature range of -30°C to 120°C, the nitrile butadiene rubber O-ring remains flexible and functional under various conditions. Although it’s less suited for outdoor use due to UV and ozone limitations, the NBR O-ring is ideal in environments where oil resistance and durability are essential. For high temperatures and chemical exposure, FKM O-rings are a better choice. EPDM O-rings on the other hand, perform better in outdoor and water-exposed environments. Nonetheless, the O ring NBR remains a solid and economical option for a wide range of applications.