NBR O-ring
Why Choose Us
Our certificate
We have approved the Quality and Environment System ISO9001:2015 and ISO 14001:2015.all of the raw materials meet the ROHS, REACH, and PAHS, and most of our products have been approved by the NSF, FDA, LFGB, ACS, KTW-W270, WRAS, and UL.
Advanced Equipment
We have advanced production equipment and testing equipment such as automatic feeding machines, automatic packaging machines, injection molding machines, automatic feeding machines, automatic sorting machines, intelligent cutting machines, perform machines, etc.
Quality Control
After completion of manufacturing, the sealing ring needs to undergo appearance inspection, dimensional inspection, pressure test, media resistance test, air tightness, hardness, tensile strength, elongation, tearing performance, compression deformation under high and low temperatures, aging resistance, Water resistance, corrosion, and other inspection items to ensure that the quality meets standard requirements.
Quality customer service
Our dedicated team is always ready to answer your questions, provide you with detailed information about our products and guide you in your choice. We understand that every customer is unique.
What is NBR O-Ring
Nitrile rubber (NBR) o-rings, also known as Buna-N, are one of the most commonly used sealing elastomers due to their resistance to petroleum-based fuels and lubricants and their relatively low price. Nitrile elastomers are copolymers of acrylonitrile and butadiene. (Learn why NBR is a popular choice). There are a number of common variations of nitrile compounds. Nitrile o-rings may also come in a metal-detectable variation while retaining the same qualities as the general Nitrile o-ring compound.For applications requiring o-rings with high visibility, High-Visibility Nitrile o-rings are recommended. High-Visibility o-rings maintain properties identical to its original compound, with the addition of a distinguishable neon green hue.
Benefits of NBR O-Ring
Oil Resistant
When sealing oil hoses and passages, you may want to use nitrile O-rings. They offer excellent resistance to oil. They won't damage or degrade. Even when directly exposed to oil over an extended period, nitrile O-rings will continue to seal the hose or passage with which they are used.
Heat Resistant
You don't have to worry about heat damaging nitrile O-rings. As an elastomer, nitrile can withstand hot temperatures. Some nitrile O-rings, in fact, can withstand temperatures of up to 135 degrees Celsius. For sealing applications in which heat is a concern, you may want to choose nitrile O-rings for their heat-resistant properties.
Readily Available
Nitrile O-rings are readily available. They are one of the most common types of O-rings. More O-rings are made of nitrile than any other elastomer. With their widespread, nitrile O-rings are inexpensive and easy to find, thus making them a popular choice among businesses.
Supports Compounding
Nitrile O-rings can be compounded. When compounded, the properties of nitrile O-rings will change. You can use compounding to increase their resistance to sunlight, for example. By default, nitrile O-rings boast a low level of protection against the sun's ultraviolet (UV) rays. Compounding, though, will increase their UV protection. If you're planning to use them outdoors where they will be exposed to the sun, compounding can extend the life of your nitrile O-rings.
Chemical Resistant
Another benefit of nitrile O-rings is chemical resistance. They are highly resistant to chemicals. Like all O-rings, nitrile O-rings are typically used around the mating surfaces of hoses. These hoses may carry chemicals, such as fuel, oil or coolant. While chemicals may degrade other types of O-rings, they won't interfere with the function of nitrile O-rings. Nitrile O-rings will continue to seal the hose while preventing the chemical from leaking out of the hose.
Strong and Durable
You can rest assured knowing that nitrile O-rings are strong and durable. When exposed to heat and/or pressure, they will expand. As the heat and/or pressure goes away, they will contract. Under normal operations, nitrile O-rings will repeat these cycles without succumbing to damage.
What are the Applications of NBR O-Ring
Automotive Industry
In the automotive industry, Buna o-rings are integral to the overall operation of various vehicle systems. Their excellent resistance to petroleum-based oils and fuels makes them ideal for use in fuel and oil systems. They maintain tight seals even under high pressures and temperatures in these settings. Commonly, they are in fuel injectors, oil seals, fuel pumps, and carburetors. Their ability to withstand high temperatures also sees them used in the heat-intensive environment of engines, specifically in areas such as gaskets and cooling systems.
Aerospace Industry
The aerospace industry heavily relies on Buna o-rings, especially in fluid power systems that demand excellent resistance to compression set and a wide operating temperature range. Buna o-rings ensure leak-free operation under the most challenging conditions, a vital aircraft safety and efficiency requirement. Moreover, Buna's resistance to a range of aircraft fuels, hydraulic fluids, and lubricating oils makes it an excellent choice for this sector.
Oil and Gas Industry
The demanding environment of the oil and gas industry also leverages the strengths of Buna o-rings. They are used extensively in drilling equipment, pumps, valves, and other downhole tools. These applications demand seals that perform under extreme pressures and temperatures. With their excellent resistance to oil-based fluids, Buna o-rings are perfect for such applications, reducing the risk of leaks and expensive downtime.
Agricultural Industry
In the agricultural sector, Buna o-rings find their way into various equipment such as tractors, irrigation systems, and harvesting equipment. In tractors, they're in hydraulic systems, fuel lines, and cooling systems. Buna o-rings also prove vital in irrigation systems, especially those that use fertilizers or other chemicals, due to their resistance to many agricultural chemicals. The substantial temperature variations typical in this sector pose no problem for Buna o-rings.
Food Processing Industry
Another industry where Buna o-rings are essential is the food processing industry. The material's resilience, durability, and resistance to a wide variety of oils and fats make it an ideal choice in this sector. They are found in numerous applications, from processing equipment to storage and transportation systems, ensuring safe and hygienic handling of food products.
The Role of Nitrile Rubber O-Rings In Various Chemical Processes And Industries
Sealing Solutions
NBR O-rings have proven to be an ideal choice for sealing applications in the chemical industry. Their excellent resistance to oils, fuels, and chemicals enables them to create reliable and leak-proof seals. Whether it's for pipes, pumps, valves, or other equipment, NBR O-rings provide a crucial barrier against hazardous substances, ensuring safety and efficiency in chemical processes.
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Chemical Compatibility
One of the key advantages of NBR O-rings is their resistance to a wide range of chemicals. They can withstand exposure to acids, alkalis, solvents, and many other aggressive substances commonly found in the chemical industry. This chemical compatibility makes NBR O-rings highly reliable for use in diverse environments, including laboratories, refineries, and manufacturing plants.
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Temperature and Pressure Resistance
NBR O-rings exhibit excellent resistance to both high and low temperatures, making them suitable for extreme operating conditions. They can withstand temperatures ranging from -40°C to 120°C (-40°F to 248°F), ensuring stability and functionality in various chemical processes. Additionally, these O-rings can withstand considerable pressure, providing a secure sealing solution even in demanding applications.
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Versatility in Applications
NBR O-rings find extensive use in the chemical industry due to their versatility. They are widely employed in pumps, compressors, mixers, and reactors, among other equipment. Their ability to create reliable seals in dynamic and static applications makes them suitable for a broad range of machinery and systems. Additionally, NBR O-rings are used in chemical storage tanks, transportation containers, and processing equipment to prevent leaks and ensure the integrity of the chemicals being handled.
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Cost-Effective Solution
NBR O-rings offer a cost-effective sealing solution in the chemical industry. Their durability and resistance to chemicals minimize the need for frequent replacements and maintenance, resulting in cost savings for businesses. Furthermore, the availability of NBR O-rings in various sizes and shapes allows for customization, ensuring compatibility with different equipment and reducing the risk of leakage or equipment failure.
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Nitrile Rubber O-Ring Materials
NBR 70A
70A Durometer O-rings offered in a variety of import and domestic compounds. Materials in this category available for purchase include GFS NBR70A, Parker N0674-70, and Parco 4200-70.
NBR 90A
90A Durometer O-rings offered in a variety of import and domestic compounds. Higher durometer materials offer better extrusion resistance at higher pressures. Materials in this category available for purchase include GFS NBR90A, and Parco 4900-90.
MIL-P-25732
Mil-Spec material focused on performing in petroleum based hydarulic fluids in military aircraft. Materials available for purchase that meet this specification are FNST N432.
AMS-83461
Better dynamic performance and longer service life at 257°F than AMS-P-25732. Materials available for purchase that meet this specification are Parker N0756-75 and Parco 4367-70.
AMS-P-5315
AMS-P-5315 is a specification related to NBR O-rings and fuel resistance. Materials need to be able to perform within a temperature range of -65F and 180F. Materials available from GFS that meet this specification are Parker N0602 and Parco 4457-65.
AMS-P-5510
AMS-P-5510 is an aerospace specification governing O-rings that are installed in aircraft hydarulic systems. Materials need to be able to perform within a temperature range of -65F to 160F. Materials available from GFS that meet this specification are Parker N0507-90.
Every industry uses O rings. Agriculture, food processing, manufacturing and engineering all depend on various types of O rings to keep equipment working well. The basic function of an O ring is as a sealing element to contain and protect liquid or gaseous materials inside a piece of equipment. Like all seals, the O ring keeps what is inside from escaping and what is outside from ingressing. Because they are used in so many diverse applications, O rings are made with a wide range of materials to suit the demands of specific environments. Two very useful materials are nitrile and silicone. When you are considering nitrile vs silicone O rings, the choice is not always obvious. They are used in some very similar applications. For example, both are used widely in the automotive industry and inflatable seals can be made with both materials. While they have some similarities, each has its own strengths. When you must decide between nitrile vs. silicone O rings, it helps to understand the benefits of each.
How to Choose NBR O-Ring
Every food and beverage processing or pharmaceutical manufacturing plant uses various types of chemicals, oils, and flavors. In addition to this, there are several equipment involved across the supply chain. So, you must have knowledge about the fluids, chemicals, or oils that the NBR O-ring will come into contact with. In addition to this, you must address the operating conditions of your system, such as the maximum pressures and temperatures your system may be exposed to and so on.
Choose a material that meets the FDA approval for food contact. A few common materials for food contact include:Silicone Rubber: This material is known for its low compression set characteristics and flexibility retention. It can be operated across the widest temperature range.
Determine the range of pressures that an NBR O-ring can withstand. It is essential as it ensures the NBR O-ring doesn't extrude or fail under high-pressure conditions. The pressure resistance helps maintain the seal integrity, prevent seal failure and extrusion, ensure system reliability, address safety considerations, and promote longevity and cost savings.
It is essential to measure the NBR O-ring's inner diameter (ID), outer diameter (OD), and cross-sectional diameter (CS). In addition to this, you must also measure the groove's dimensions before the NBR O-ring is placed in it. This helps avoid leaks or mitigate inefficiencies. The NBR O-ring needs to fit firmly inside the groove to create a reliable seal.
NBR o-rings are available in different hardness levels, typically measured using the Shore A or Shore D scales. Hardness determines the NBR O-ring's resistance to deformation under pressure. Choosing the correct hardness and durometer helps ensure proper sealing performance, durability, and overall functionality of the NBR O-rings. Therefore it is important to select the appropriate hardness level based on the application's specific needs.
Properties of Buna (Nitrile) O-Rings
While o-rings might seem simple, they are a product of advanced material science and precise manufacturing techniques. Buna o-rings, known as Nitrile o-rings, are made from synthetic rubber-Nitrile Butadiene Rubber (NBR). The term “Buna” is derived from Bu (Butadiene) and Na (Sodium-the polymerization agent).
Buna o-ringsunique properties result from their chemical composition, specifically the co-polymerization of butadiene and acrylonitrile. By altering the proportions of these two components, manufacturers gain control over specific properties. For instance, a higher acrylonitrile content will increase resistance to petroleum-based oils and fuels, while a lower range improves low-temperature performance.
Various industries celebrate Buna o-rings because of their excellent resistance to oils, fuels, silicone greases, hydraulic fluids, and certain alcohols. These rings also resist damage from compression set, tearing, and abrasion, promising an extended and efficient service life compared to many other materials. This robust performance profile renders Buna highly versatile and suitable for various applications where durability, flexibility, and resistance are paramount. Check out our interactive chemical compatibility tool to check if Buna is resistant to a specific chemical.
Among Buna's standout attributes is its impressive tensile strength, which generally falls between 1000 to 3000 PSI. Furthermore, Buna exhibits an elongation percentage of 200 to 400. This flexibility enables Buna o-rings to maintain a solid seal while offering enough elasticity to install them in various configurations. You can view the specification sheet for a Buna product purchased through Global O-Ring by visiting our compound page.
How to Maintain NBR O-Ring
Do use compressed air or a soft brush
Frequently cleaning the rings is a vital part of maintenance. This is especially important for NBR O-Ring that provide a seal to machines. If you find any debris, grit, or contamination, you should clean it using a soft brush to avoid abrasions.Additionally, if there are any signs of corrosion or cracks on the ring, you must look for a replacement as using a broken NBR O-Ring can lead to major defects.
Do lubricate regularly
O-rings need substantial lubrication to function correctly. If not, cracks can occur and ultimately cause severe damage. This is especially significant for machines that require seals to be opened and closed. For this instance, you can use any silicone-based NBR O-Ring lubricant like WEICON Silicone Grease and apply the necessary amount.
Do be familiar with other maintenance products
Remember, there are various kinds of NBR O-Ring made for different purposes. They can be Neoprene, Viton, or NBR-based rings. What you need will determine the type of NBR O-Ring you should buy. Simplex offers O-rings made from various materials such as silicone, Viton, and nitrile rubber.Additionally, you may need products like adhesives and sealants while maintaining your NBR O-Ring. Sealants block fluids between spaces, while adhesives bind two parts together.
Do store it properly
Knowing how to store NBR O-Ring is just as important as applying them. You should keep them in an airtight bag, away from sunlight. Using old NBR O-Ring can lead to severe consequences, so it is always better to be safe.Additionally, the rings could get brittle over time. If that happens, it is best to check out suppliers like Simplex for new ones.
Don't stretch out the ONBR O-Ring
It is crucial to apply NBR O-Ring carefully, as improper care can result in significant damage. Stretching the NBR O-Ringg can cause detrimental effects such as abrasions, degradation, and flattening. These NBR O-Ring failures can lead to costly repairs, as they can also damage other components that you may need to replace.You must understand the application of your NBR O-Ring, as well. We likewise recommend that you do some evaluation before buying a specific product to save you from wasted purchases and ensure that you are correctly applying the NBR O-Ring.
Don't use tools with sharp edges
You should avoid using tools with pointy tips or sharp edges while working with NBR O-Ring. Sharp tools can easily damage the NBR O-Ring and affect its sealing capability. These tools must be handled with care and, depending on the application, can cause severe issues.If you need to remove and install NBR O-Ring, remember to slide, not roll. Use your fingers to slowly squeeze it sideways until you can push one edge out from its recess. Continue doing so carefully until you have removed the NBR O-Ring. Once you are done, clean the NBR O-Ring the area around it. Discard any debris or grease and check for cracks or corrosion.
Our Factory
We are a major rubber sealing products manufacturer with advanced research and development, manufacturing, and sales. We have approved the Quality and Environment System ISO9001:2015 and ISO 14001:2015.Our products are extensively applied to Food and Drinking Water Sanitary and bathing products, electronic and electric appliances hardware and machinery Auto parts, etc.We are professionally specialized in rubber O-rings, Y-seals, Shower gaskets, RO membrane seals, Silicone tubes, and other industries' customized rubber parts.To further increase the quality, all of the raw materials meet the ROHS, REACH, and PAHS, and most of our products have been approved by the NSF, FDA, LFGB, ACS, KTW-W270, WRAS, and UL.
Certificate
FAQ
As one of the most professional nbr o-ring manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy customized nbr o-ring at competitive price from our factory.
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