Are you searching for the best Buna O-ring factories in China to meet your industrial needs? Look no further In this article, we’ll compare the top manufacturers, highlighting their strengths, product ranges, and what sets them apart. Let’s dive into the world of reliable and high-quality Buna O-rings.

Buna-n O-ring Manufacturers and Suppliers China

NBR O-Rings, Buna-N / Nitrile O-Rings – China Manufacturer

Product Details: NBR O-Rings, also known as Nitrile O-Rings, Buna-N O-Rings, or Perbunan O-Rings, are made by the copolymerization of acrylonitrile and butadiene. The acrylonitrile content varies from 18% to 50%. These O-Rings have a temperature range of -40 °C (-40 °F) to 120°C (248 °F) and a standard durometer hardness of Shore A 70. They are available in various sizes and colors, with black being the standard. The cross-section shape is round, and the cross-section width ranges from 0.5 to 20 mm. They comply with standard sizes such as AS 568, BS 1806, ISO 3601, DIN 3771, and JIS B 2401.

The shelf life is 5 – 10 years[3].

Pros:
– Excellent resistance to oils, fuels, and many chemical substances
– Good mechanical properties, including abrasion resistance and heat resistance
– Wide applicability in various industries such as automotive, aerospace, and mach…
– Durable and wear-resistant, extending the seal’s lifespan and reducing maintenan…
– Low price and good performance

Cons:
– Not suitable for use in polar solvents such as ketones, ozone, nitrobenzene, and…
– Higher acrylonitrile content reduces low-temperature flexibility and can make th…
– Not resistant to ozone, sunlight, or weathering

Buna-N 70 Shore A Rubber O-Rings

Product Details: The website discusses various types of O-rings, including NBR (Nitrile), FKM/FPM (Viton), PTFE, Neoprene, EPDM, and MVQ (Silicone). For FKM/FPM (Viton) O-rings, the temperature range is from -25°C (-13°F) to 204°C (399°F). NBR (Nitrile) O-rings operate from -40°C (-40°F) to 120°C (248°F). The site also mentions that SVKS Seal offers a broad assortment of standard and custom-designed O-rings in various materials and dimensions.

Pros:
– FKM/FPM (Viton) O-rings have excellent resistance to high temperatures, oils, so…
– NBR (Nitrile) O-rings offer good wear resistance and are suitable for applicatio…
– SVKS Seal provides a wide range of O-ring materials and custom design options to…

Cons:
– NBR (Nitrile) O-rings are not resistant to weathering, sunlight, and ozone unles…
– FKM/FPM (Viton) O-rings may not be suitable for applications involving brake flu…
– NBR (Nitrile) O-rings have limited chemical resistance compared to Viton O-rings…

Buna-N O-ring

Product Details: Sealsmart is a manufacturer of various rubber seals and products, including O-rings, X-rings, rubber washers, rubber gaskets, oil seals, V-rings, and rubber balls. They also offer customized rubber seal products and serve industries such as chemical processing, fossil fuels, hydroelectric, filtration, oil & gas, pharmaceutical, automotive, electronics, valves and pumps, and plumbing products.

Pros:
– High-quality products with independent research and development capabilities.
– Wide range of products catering to various industries.
– Customized products available for OEM manufacturers.
– Strong manufacturing base and commitment to sealing solutions.

Cons:
– No specific product page available for detailed analysis.
– General information does not include customer-specific feedback or reviews.

Buna-N Nitrile O Ring Gasket Cord

Product Details: Buna-N (nitrile) o-rings, seals, and gaskets are made from a synthetic rubber material known as NBR (nitrile butadiene rubber). They are highly resistant to petroleum-based oils, fuels, mineral and vegetable oils, diluted acids, and alkalines. These o-rings operate within a temperature range of -40°F to 250°F (-40°C to 121°C) and have a tensile strength of 200-3000 psi with an elongation at break of approximately 300%. They are available in various durometers, typically ranging from 40 to 90 Shore A, with a standard hardness of 70 Shore A.

Pros:
– Excellent resistance to petroleum-based oils, fuels, and other chemicals
– Good to excellent dynamic and set resistance
– Retains shape and seal after long periods of compression
– Less likely to cause allergic reactions compared to latex or natural rubber
– High strength and puncture resistance
– Cost-effective and durable

Cons:
– Not compatible with brake fluids, acetones, aromatic hydrocarbons, chlorinated h…
– Poor resistance to ozone, weathering, and sunlight
– Fair to good electrical properties, tear resistance, and water steam resistance

hydraulic rubber nitrile Buna-N NBR o ring … – DMS Seals

Product Details: The hydraulic rubber nitrile Buna-N NBR O-rings are made from Nitrile Butadiene Rubber (NBR) and are available in hardness levels of 70 and 90 Shore A. These O-rings are black in color and come in various sizes, including P, G, AS568, and custom sizes. They are used for static sealing and can be applied in dynamic conditions under better system conditions. The operating temperature range is -30°C to +100°C, and they can handle pressures up to 5MPa. The O-rings are suitable for use with hydraulic oil, fire retardant liquids, water, and other media. They are commonly used in applications such

as excavators, loaders, graders, and other heavy machinery[1][2][5].

Pros:
– Excellent sealing properties and durability
– Wide range of sizes and custom sizes available
– Suitable for use with various media including hydraulic oil, fire retardant liqu…
– High temperature and pressure resistance
– Used in both static and dynamic applications

Cons:
– Not recommended for rotary motion without sufficient lubrication
– Limited to specific temperature and pressure ranges (-30°C to +100°C and up to 5…
– May not perform optimally in applications with insufficient system lubrication

O Ring uggggg Black BUNA NBR Nitrile

Nbr ring store – Kin by Rice n Roll

Product Details: Kin by Rice n Roll is a small, family-run restaurant operated by Rice n Roll family members. It is located in the Wauwatosa neighborhood and is known for its homemade, fresh, tasty, and fun Asian food and sushi. The restaurant serves a modernized look and authentic taste from across Asia, especially Thailand and Japan.

Pros:
– Varieties of Asian food and sushi with modernized look and authentic taste
– Family-run restaurant with a passion for homemade cooking
– Offers takeout and delivery services
– Reservations available for parties of 2 or more

Cons:
– No reservations accepted on Friday and Saturday
– Table will be released if party is more than 5 minutes late

buna o rings – Quality Supplier from China

Nitrile(Buna-N) O-RING

Product Details: Nitrile Buna-N (NBR) o-rings are made from acrylonitrile butadiene copolymer. They are widely used due to their excellent sealing and mechanical properties at a low cost. The acrylonitrile content varies between 18% to 50%, affecting the material’s physical properties such as oil and fuel resistance, elasticity, and compression set resistance. NBR o-rings have good mechanical properties, high wear resistance, and are suitable for applications involving petroleum oils, fuels, silicone oils, greases, and water. They are available in various hardness levels (40 to 90 Shore A) and can be compounded for specific applications like FDA compliance and high-temperature resistance.

Pros:
– Excellent resistance to petroleum-based oils and fuels
– Good mechanical properties and high wear resistance
– High tensile strength, abrasion resistance, and compression resistance
– Suitable for a wide range of applications including pneumatic, hydraulic, and fu…
– Low cost and widely available
– Can be compounded for FDA applications and specific temperature requirements

Cons:
– Not resistant to weathering and ozone
– Incompatible with aromatic hydrocarbons, chlorinated hydrocarbons, polar solvent…
– Adversely affected by high aromatic content fuels and brake fluids with glycol b…
– Limited low temperature flexibility with high acrylonitrile content
– Phthalate type plasticizers can migrate out and cause problems with certain plas…

Comparison Table

Frequently Asked Questions (FAQs)

What is Buna-N (Nitrile) rubber, and what are its key properties?

Buna-N, also known as Nitrile or NBR, is a type of synthetic rubber made from the copolymerization of acrylonitrile and butadiene. It is known for its excellent resistance to petroleum products, oils, and fuels, as well as its good mechanical properties, abrasion resistance, and heat resistance. However, it is not suitable for use in polar solvents like ketones or ozone.

What are the typical applications of Buna-N O-Rings?

Buna-N O-Rings are widely used in various industries due to their versatility. You can find them in fuel tanks, lubricating oil tanks, and in fluid media such as petroleum hydraulic oil, gasoline, and silicone oil. They are also used in automotive, industrial machinery, HVAC systems, and other applications where resistance to oils and fuels is crucial.

How do I choose the right Buna-N O-Ring for my application?

When choosing a Buna-N O-Ring, consider the temperature range, chemical resistance, and durometer hardness required for your application. Buna-N O-Rings can operate from -40°C to 120°C and come in various durometer hardness levels (Shore A 40-90). Ensure the acrylonitrile content matches your needs, as higher content improves resistance to hydrocarbon fuels but worsens low-temperature performance.

What are the advantages of using Buna-N rubber washers and spacers?

Buna-N rubber washers and spacers offer several advantages. They provide excellent resistance to petroleum products, oils, and fuels, making them ideal for applications involving these substances. They also prevent leaks, protect surfaces, and dampen vibration, making them superior to metal washers in many scenarios. Additionally, they are durable and flexible, ensuring a tighter seal and better performance in various industrial and mechanical applications.

How can I ensure the quality and reliability of Buna-N O-Rings from Chinese manufacturers?

To ensure the quality and reliability of Buna-N O-Rings from Chinese manufacturers, look for suppliers with verified business licenses and certifications such as IATF 16949:2016. Check if the manufacturer has advanced equipment and technology, and if they provide value-added services like in-house tool and mold design. Also, verify that their products comply with international standards like ASTM, REACH, and RoHS. Contacting the manufacturer directly to discuss your specific needs and quality control processes can also be beneficial.