Are you looking for the best NBR o-ring manufacturers in China? With so many options available, choosing the right one can be overwhelming. In this article, we’ll compare the top NBR o-ring factories in China, highlighting their strengths, product ranges, and what sets them apart. Let’s dive in and find the perfect fit for your needs.

FKM O Rings, China NBR O Ring supplier

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

Product Details: Nitrile (NBR) O-rings are made from a synthetic rubber compound known for its excellent resistance to oil, fuel, and other chemicals. They are commonly used in applications involving petroleum-based fluids, hydraulic fluids, and other corrosive substances. NBR O-rings are available in various sizes and can operate effectively in a wide range of temperatures.

Pros:
– Excellent resistance to oil, fuel, and other chemicals
– High durability and longevity in harsh environments
– Effective in a wide range of temperatures
– Resistant to abrasion and wear

Cons:
– Limited resistance to ozone, sunlight, and certain chemicals like ketones and es…
– May not be suitable for applications involving high temperatures or certain type…
– Generally more expensive than some other types of O-rings

Wholesale NBR O-Rings with Good Price

Product Details: NBR O-Rings, also known as Nitrile or Buna-N, are made from a copolymer of butadiene and acrylonitrile. They have a hardness range of 40 to 90 Shore A and a working temperature range of -40°F to 257°F. These O-Rings offer excellent resistance to petroleum-based oils, fuels, silicone greases, hydraulic fluids, water, and alcohols. They are available in various sizes and are formulated with fillers, plasticizers, antioxidants, and vulcanizing agents to enhance their sealing properties.

Pros:
– Excellent resistance to oils, fuels, and various chemical substances.
– High tensile strength, abrasion resistance, and low compression set.
– Good mechanical properties, including high wear resistance and low gas permeabil…
– Economical and widely used in industrial applications.
– Can be formulated to meet FDA standards for specific uses.

Cons:
– Not compatible with highly aromatic fuels, non-polar solvents, and glycol-based…
– Limited resistance to ozone, sun exposure, rain, and wind.
– Higher acrylonitrile content reduces elasticity and resistance to compression se…
– Not suitable for applications requiring high flexibility and adaptability.

China NBR HNBR FKM PTFE O Ring Manufacturer

China O Rings Manufacturers and Suppliers

china manufacture black NBR 70 rubber o-ring with high …

Product Details: NBR 70 Shore A O-rings are made from Nitrile-Butadiene Rubber (NBR), a synthetic copolymer of acrylonitrile and 1,3-butadiene. They have a hardness of 70 Shore A and are commonly used in various applications due to their excellent sealing properties and durability. The material contains 18-50% acrylonitrile, which affects its resistance to oils and low temperature flexibility. These O-rings are available in a wide range of dimensions and are typically black in color.

Pros:
– Excellent sealing properties and durability
– Relatively low cost
– Great mechanical properties
– Resistance to many common oils, fuels, and lubricants
– Suitable for use with petroleum oils and fuels, ethylene glycol fluids, mineral…

Cons:
– Poor resistance to weathering, sunlight, and ozone
– Not suitable for use with ketones, halogenated hydrocarbons, auto and aircraft b…
– Decreased low temperature flexibility and increased brittleness with higher acry…

China O-Ring Kits Suppliers – NNK oil seal

Product Details: The Universal Type O-Ring Kit Box 30 size is a professional-quality assortment of O-rings. It includes 382 pieces of O-rings in 30 of the most popular sizes, both in inches and millimeters. The O-rings are made from commercial-grade nitrile butadiene rubber (NBR) and fluoroelastomer (FKM) materials, offering oil, chemical, and high-pressure resistance. The kit is suitable for various applications, including machines and excavators. The O-rings have a hardness range of 60-90 Shore A and can operate in temperatures from -40°C to 260°C. The kit comes in a practical resealable plastic case and is certified with ISO9001/TS16949 standards.

Pros:
– High-quality materials (NBR and FKM) providing excellent oil and chemical resist…
– Wide range of sizes (30 sizes) to fit various applications
– Durable and long-lasting with thick wall construction
– UV resistant and suitable for use with liquids such as oil
– Certified with ISO9001/TS16949 standards ensuring high quality
– Practical resealable plastic case for easy storage

Cons:
– Limited to specific materials (NBR and FKM), may not be suitable for all environ…
– No mention of availability for custom sizes or special orders beyond the standar…
– May require additional backup rings for elevated operating pressure environments

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

red high precision large rubber o ring, NBR O Ring, China …

Product Details: The red high-precision large rubber O-ring is made from Nitrile (NBR) material. It complies with standardized dimensional parameters such as AS568 and ISO 3601. The O-ring has a Shore A durometer range, typically between 40-90, and is available in various sizes, including standard and custom dimensions. It is designed for sealing applications in both static and dynamic conditions, providing a reliable barrier against fluid and gas leakage. The O-ring is suitable for a wide range of temperatures (-40 to +257°F) and has good resistance to petroleum fluids, ozone, and weathering.

Pros:
– High precision and reliability in sealing applications
– Compliant with AS568 and ISO 3601 standards for consistent quality
– Wide range of temperature and chemical resistance
– Available in various sizes, including custom dimensions
– Good resilience and compression set properties

Cons:
– Limited high-temperature resistance compared to other materials like Viton (FKM)
– May not be suitable for applications requiring extreme chemical resistance or lo…
– Can be affected by certain solvents and acids
– Requires proper gland design and installation to maintain seal integrity

NBR Material Square Profile O-Rings

Product Details: Material: Buna-N Rubber. Cross Section Shape: Square. Hardness: Durometer 70A (Medium). For Use With: Grease, Hydraulic Oils. Temperature Range: -30° to 212° F. Color: Black.

Pros:
– Excellent resistance to grease and hydraulic oils.
– Medium hardness provides good mechanical properties.
– Wide temperature range from -30° to 212° F.
– Customized sizes available to cater to special requirements.

Cons:
– Not resistant to weathering and ozone without special formulation.
– Not suitable for exposure to sunlight, UV light, or harsh chemicals like acids a…

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About O-Ring NBR Factories in China

What materials are commonly used by O-ring NBR factories in China?

O-ring NBR factories in China often use a variety of materials, but Nitrile Butadiene Rubber (NBR) is one of the most common. NBR is popular due to its good properties and low cost, making up about 50% of the world’s O-rings. Other materials like FKM (Viton), EPDM, HNBR, and silicone are also widely used depending on the specific application and requirements.

Can I customize O-rings according to my specifications?

Yes, you can customize O-rings according to your specifications. Many factories in China, such as Dongguan Hongju Silicone Rubber Products Co., Ltd. and Savvy Rubber, offer OEM and ODM services. They can produce custom O-rings in various sizes, shapes, and materials based on your drawings or samples.

What are the typical minimum order quantities (MOQs) for O-ring orders in China?

The minimum order quantities (MOQs) for O-ring orders in China can vary. Some factories have relatively low MOQs, such as 10-100 pieces, while others may require larger orders, typically ranging from 500 to 5,000 pieces. It’s best to check with the specific manufacturer for their MOQ policies.

Do Chinese O-ring factories provide certifications and comply with international standards?

Yes, many Chinese O-ring factories provide certifications and comply with international standards. For example, factories like Shangrao Ruichen Sealing Co., Ltd. and Zhongshan Melon Rubber & Plastic Products Co., Ltd. hold certifications such as ISO 9001, ISO 14001, IATF16949, and ISO 13485. They also adhere to various international O-ring standards like AS568, BS1516, DIN 3771, and ISO 3601.

Can I get free samples from Chinese O-ring factories for testing?

Yes, you can get free samples from some Chinese O-ring factories for testing. Companies like Dongguan Hongju Silicone Rubber Products Co., Ltd. offer free samples to potential customers, allowing you to test the quality and performance of their O-rings before placing a larger order. This is a great way to ensure the products meet your requirements.