Are you wondering which materials are the best for o-rings in Chinese factories? When it comes to o-rings, the right material can make all the difference in performance and durability. Let’s dive into the top materials used by China’s leading o-ring manufacturers and find out what sets them apart.

Top 10 O-ring Manufacturers and Suppliers in China (2024)

Product Details: Hongju produces high-quality silicone rubber O-rings and high-temperature O-ring seals. These O-rings are widely used in various applications such as engines, pumps, cylinders, connectors, and valves. The company offers both standard sizes and custom-made O-rings to meet specific customer needs. The manufacturing process includes design, tool making, color mixing, compression molding, quality inspection, and packaging. Hongju adheres to ISO 3601 standards for dimensions and tolerances and can use various materials including liquid silicone rubber. The company is ISO 9001: 2008 certified and complies with international safety standards like CE, SGS, REACH, and ROHS Directive requirements[1][2][3].

Pros:
– High-quality silicone rubber O-rings with strong resistance to water, oil, and h…
– Customization capabilities to meet specific customer requirements
– Strict quality control and adherence to ISO 3601 standards
– Wide range of materials available, including liquid silicone rubber
– Compliance with international safety standards like CE, SGS, REACH, and ROHS Dir…
– Rapid prototyping and low minimum order quantity (MOQ) options
– Experienced and certified staff with excellent English communication

Cons:
– Importing from China may involve longer shipping times
– Factory inspections may be limited due to epidemic restrictions, though online i…
– Production cycle can vary based on order quantity and complexity

China O Rings Manufacturers and Suppliers

O-Rings, Rubber Seals – Best China Manufacturer & …

Product Details: Savvy manufactures a wide range of o-rings made from various materials including rubber, metal, and other materials. The most commonly used materials are NBR, FKM (Viton), and Silicone. NBR is widely used due to its good properties and low cost. FKM/Viton offers the best comprehensive performance and is used in high-standard sealing equipment. Silicone is often used in medical and food industries due to its FDA compliance, tastelessness, non-toxicity, and resistance to high temperatures and severe cold. The temperature range for these o-rings varies, with Silicone ranging from -70°C to 220°C. The hardness of o-rings is measured in Shore A,

typically ranging from 40 to 90, with 60-70 being the most common. O-rings are available in various colors and can be customized to meet specific needs.

Pros:
– High-temperature and FDA food grade options available
– Wide range of materials to suit different working conditions
– Low mold/tooling cost for custom o-rings
– Fast delivery options
– High precision and smooth appearance
– Good wear resistance, oil resistance, and corrosion resistance depending on the…

Cons:
– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p…
– High hardness o-rings can be inconvenient to install
– Unique colors may increase cost and require larger MOQ with longer delivery time…

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
– Suitable for high-pressure and harsh conditions
– Durable and UV resistant
– Practical resealable plastic case for storage
– Meets ASTM D 2000 and ISO9001/TS16949 standards

Cons:
– Limited to specific materials (NBR and FKM), which may not be suitable for all e…
– No mention of availability for custom sizes beyond the 30 provided
– May require additional backup rings for elevated operating pressure environments

Rubber O-Ring Seals, different size and material oring …

Product Details: Product name: O Ring / O-Ring Seals. Color: Any color, according to customer requirements. Hardness: 40-90 Shore A. Material: NBR, FKM, Silicone, EPDM, HNBR, CR. Working temperature: -48~+260°C. Resistance: Oil, High Temperature, Ozone, Water, Chemical Resistant. Supply Ability: 10,000,000 pieces per month. Packaging: Inner plastic bag, outer carton, or custom. Place of Origin: China Ningbo. Certifications: ISO9001/TS16949, SGS, FDA, RoHS, REACH.

Pros:
– Wide range of materials available (NBR, FKM, Silicone, EPDM, HNBR, CR) to suit v…
– High temperature and chemical resistance.
– Customizable colors and sizes.
– Compliant with multiple certifications (ISO9001/TS16949, SGS, FDA, RoHS, REACH).
– High supply ability with 10,000,000 pieces per month.
– Experienced quality control and assurance system.

Cons:
– Minimum Order Quantity (MOQ) of 5,000 pieces may be a barrier for small orders.
– Lead time depends on the number of products, which could be variable.

Custom HNBR O-Ring Manufacturer in China

Product Details: HNBR (Hydrogenated Nitrile Butadiene Rubber) O-rings are made by hydrogenating the double bonds in nitrile rubber, enhancing their heat, ozone, and chemical resistance. They are available in 70, 80, and 90 durometers and have a temperature range from -40°C to +150°C (-40°F to +302°F). HNBR O-rings are suitable for use with petroleum-based oils and fuels, aliphatic hydrocarbons, vegetable oils, silicone oils and greases, ethylene glycol, water, and steam up to 300°F, as well as diluted acids, bases, and salt solutions.

Pros:
– Excellent resistance to oils and chemicals
– Superior heat and ozone resistance
– Good low-temperature properties depending on Acrylonitrile (ACN) content
– Resistant to water and steam up to 300°F
– Cost-effective alternative to fluorocarbon rubber in some applications

Cons:
– Not suitable for use with chlorinated hydrocarbons, ketones, ethers, esters, and…
– Higher ACN content reduces low-temperature properties
– Sulfur-curing reduces heat resistance and increases compression set

Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司

Viton O Ring Suppliers, Manufacturers, Factory

Stainless O Ring Manufacturer in China – HM

Product Details: The stainless steel O rings manufactured by HM involve a precision CNC machining process. The process starts with the selection of high-quality stainless steel material. These O rings are available in various grades, including 304, 304L, 316, and 316L, which are known for their corrosion resistance and durability. They can be customized to meet specific requirements and are suitable for a wide range of applications, including marine, aerospace, and industrial uses.

Pros:
– High-quality stainless steel material ensures durability and corrosion resistanc…
– Precision CNC machining for accurate dimensions and reliable performance.
– Customizable to meet specific industry or application needs.
– Suitable for various industries such as marine, aerospace, and industrial applic…

Cons:
– No specific cons mentioned on the website, but potential drawbacks could include…

Custom O Ring Manufacturing in China with Quick Tooling …

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About O-Ring Materials in Chinese Factories

What types of materials are commonly used for O-rings in Chinese factories?

Chinese O-ring factories often use a variety of materials, including nitrile rubber, silicone, Viton, and fluororubber. Nitrile rubber is popular for its resistance to oil and fuel, making it ideal for automotive and aerospace applications. Silicone is used for its high temperature resistance and flexibility, while Viton and fluororubber are chosen for their chemical resistance.

How do I choose the right material for my O-ring needs?

To choose the right material, consider the specific application and environment your O-ring will be in. For example, if you need an O-ring for high-temperature applications, silicone or fluororubber might be the best choice. For chemical-resistant applications, Viton is often preferred. If you’re unsure, consult with the manufacturer to determine the most suitable material for your needs.

What are the advantages of using nitrile rubber for O-rings?

Nitrile rubber is widely used due to its excellent resistance to oil, fuel, and other petroleum-based products. It also offers good abrasion resistance and can operate effectively in a wide range of temperatures. This makes nitrile rubber O-rings ideal for use in the automotive, aerospace, and industrial sectors.

How do Chinese factories ensure the quality of their O-ring materials?

Chinese factories that specialize in O-ring production typically employ rigorous quality control measures. This includes inspecting raw materials, conducting thorough tests during and after production, and ensuring compliance with international standards. Many factories also offer free samples for testing to assure customers of the product quality.

Can I customize the material and specifications of my O-rings?

Yes, many Chinese O-ring manufacturers offer customization options. You can specify unique requirements such as size, material, and performance characteristics. For instance, if you need an O-ring with specific hardness or chemical resistance, manufacturers like Dongguan Hongju Silicone Rubber Products Co., Ltd. and China Feiyun Seal Factory can provide tailored solutions to meet your needs.