Are you looking for the best buna O-rings factories in China? With China being a global leader in rubber production, finding the right manufacturer can be overwhelming. In this article, we’ll compare the top buna O-rings factories in China, helping you make an informed decision for your needs. Let’s dive in and explore the best options available.

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 industries such as automotive, aerospace, and machinery
– 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 O-Rings (NBR) Nitrile

Buna-n O-ring Manufacturers and Suppliers China

Buna nitrile store o rings – Kin by Rice and Roll

Product Details: Kin by Rice n Roll is a small, family-run restaurant operated by the Rice n Roll family. It is located in the Wauwatosa neighborhood and specializes in homemade, fresh, and tasty Asian food and sushi with 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 passionate approach to cooking
– Offers takeout, delivery, and reservations for parties of 2 or more
– Diverse menu including dishes like Pad Thai, Crab Rangoon, Tonkotsu Ramen, and m…

Cons:
– Reservations not available on Fridays and Saturdays, walk-in only
– Table will be released if party is more than 5 minutes late

Buna-N 70 Shore A Rubber O-Rings

Product Details: The website discusses Nitrile (NBR or Buna-N) and Viton (FKM/FPM) O-rings. Nitrile O-rings operate within a temperature range of -40°C to 120°C (-40°F to 248°F) and are suitable for general purpose applications requiring resistance to aliphatic hydrocarbons, petroleum oils, water, and hydraulic fluids. Viton O-rings can withstand temperatures between -25°C to 204°C (-13°F to 399°F) and are best for sealing jobs that require high temperature and chemical resistance, including contact with petroleum oils, acids, silicone fluids, and gases.

Pros:
– Nitrile O-rings have good wear resistance and are effective against most oils an…
– Nitrile O-rings offer superior abrasion and tear resistance, making them suitabl…
– Viton O-rings provide high temperature resistance and excellent chemical resista…
– Viton O-rings are versatile and function well in various automotive, chemical, a…

Cons:
– Nitrile O-rings are not resistant to weathering, sunlight, and ozone unless a sp…
– Nitrile O-rings do not work well with brake fluid, ketones, and some hydraulic f…
– Viton O-rings become inflexible and hard below -15°C in dynamic applications.
– Viton compounds are approximately ten to fifteen times more expensive than NBR.

buna o rings – Quality Supplier from China – FKM O Rings

Buna-N Nitrile O Ring Gasket Cord

hydraulic rubber nitrile Buna-N NBR o ring …

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 circumstances. The operating temperature range is -30°C to +100°C, and they can handle pressures up to 5 MPa. 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:
– High sealing efficiency due to the deformation of the O-ring section under press…
– Versatile application in both static and dynamic sealing conditions
– Compatible with a wide range of media including hydraulic oil, fire retardant li…
– Available in various sizes and custom specifications
– Good mechanical properties and resistance to oils and greases

Cons:
– Not recommended for use without sufficient lubrication during rotary motion
– Limited to a maximum speed of 2 m/s
– May not perform optimally in high-speed dynamic applications
– Dependent on system conditions such as lubrication, pressure, and surface qualit…

Wholesale buna o rings with Good Price

Product Details: Buna-N O-Rings, also known as Nitrile or NBR, are made from a synthetic rubber material that is a copolymer of acrylonitrile and butadiene. They are widely used due to their economical cost and excellent performance in various applications. These O-Rings are available in standard durometers of 70 and 90 but can be produced in other hardness levels as well. The acrylonitrile content can vary from 18% to 50%, affecting their resistance to fuels and low-temperature properties. They are typically black but can also be found in other colors for specific applications.

Pros:
– Excellent chemical resistance to petroleum-based oils and fuels, silicone grease…
– High tensile strength and abrasion resistance.
– Low compression set and good short-term resilience.
– Cold and heat resistance with a temperature range from -40° to +257°F.
– Compliant with FDA food contact regulations for applications involving food, fat…
– Good wear resistance and permeation resistance.

Cons:
– Low ozone resistance, making them unsuitable for outdoor applications exposed to…
– Poor flame resistance, so they should not be used in applications involving open…
– Not recommended for sealing against brake fluids, acetones, ketones, halogenated…
– Not suitable for applications exposed to sunlight, UV light, or general weatheri…

China Best Nitrile Buna-N O RINGS Suppliers and Manufacturers

Product Details: Nitrile (NBR) O-Rings, also known as Buna-N or Perbunan O-Rings, are made from a synthetic copolymer of acrylonitrile and butadiene. They have a temperature range of -40°F to 248°F (-40°C to 120°C), with a standard durometer hardness of 70 Shore A, though it can range from 40 to 90 Shore A. These O-Rings are compliant with various standards including AS568, ISO 3601, and DIN 3771. They are widely used in applications involving petroleum oils, fuels, silicone oils, and greases, as well as in pneumatics, hydraulics, and fuel systems[2][3][4].

Pros:
– Excellent resistance to oils, fuels, and other petroleum-based fluids
– Good mechanical properties, including tensile strength, abrasion resistance, and…
– Cost-effective and versatile
– Suitable for a wide range of temperatures
– Good compatibility with water, steam, and dilute acids
– Hydrogenated nitrile (HNBR) versions offer improved resistance to ozone, heat, a…

Cons:
– Not suitable for use in polar solvents such as ketones, ozone, nitrobenzene, and…
– Higher acrylonitrile content reduces low-temperature flexibility and increases c…
– Incompatible with benzene, toluene, xylene, halogen derivatives, and strong acid…
– Limited resistance to weather and ozone without special formulations

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About Buna O-Rings Factories in China

What are Buna O-Rings made of and what are their key characteristics?

Buna O-Rings are made from Nitrile Butadiene Rubber (NBR), a copolymer of acrylonitrile and butadiene. They are known for their excellent mechanical properties, good abrasion resistance, and heat resistance. They also offer great compatibility with fuels, oils, and solvents, although they are not suitable for polar solvents like ketones or ozone.

What is the temperature range for Buna O-Rings?

Buna O-Rings can operate within a temperature range of -40°C to 120°C (-40°F to 248°F), although some specialized types can handle temperatures as low as -55°C or as high as 250°C. This makes them versatile for various applications.

Where are Buna O-Rings commonly used?

You’ll find Buna O-Rings in a wide range of applications, including hydraulic and pneumatic systems, fuel tanks, lubricating oil tanks, and in fluid media such as petroleum hydraulic oil, gasoline, and silicone oil. They are also used in static and low-pressure dynamic applications.

How do I install Buna O-Rings correctly?

To install Buna O-Rings, make sure to use soft assembly tools with no sharp edges to avoid damaging the O-Ring. Before installation, oil all individual parts of the seal with system oil. Ensure the O-Ring is fitted into the groove correctly, and the surface quality of the metal parts is suitable.

What are the advantages of using Buna O-Rings?

Buna O-Rings offer several advantages, including ease of installation and removal, economical sealing solutions, and a wide range of dimensions and compounds. They provide two-sided sealing, making them ideal for both rod and piston applications, and they take up less space compared to other sealing elements. Additionally, they are cheap and simple, making them a popular choice.