Are you looking for the best O-ring manufacturers in China for your automotive needs? With so many options available, it can be overwhelming to choose the right one. In this article, we’ll compare the top car 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 vehicle.

China O-Ring Kits Suppliers – NNK Oil Seal

FKM O Rings, China NBR O Ring supplier

O-Rings | China – Products | Parker NA

Product Details: Parker O-rings are circular sealing elements with circular cross-sections, primarily used in static applications. They are specified by their inside diameter and come in various materials such as Nitrile (NBR), Fluorocarbon (FKM, FPM), Ethylene Propylene (EPDM), Hydrogenated Nitrile (HNBR), Silicone (VMQ), and others. Each material is tailored for specific applications, including automotive, chemical processing, pharmaceutical, and general industrial uses. For example, FKM O-rings are excellent for oil & gas and dynamic applications due to their compatibility with oils, gases, hydraulic oils, and fuels. EPDM O-rings are focused on food & beverage, chemical processing, and pharmaceutical applications, while HNBR O-rings offer

good mechanical robustness for automotive and heavy-duty applications[5].

Pros:
– Wide range of materials to suit various applications
– Excellent chemical and temperature resistance depending on the material
– Ease of service with no smearing or retightening required
– No critical torque on tightening, reducing the risk of structural damage
– Compact and lightweight design
– Cost-effective and reusable in many cases
– Gradual and easily identifiable failure mode

Cons:
– Material compatibility issues with certain fluids and chemicals (e.g., NBR is no…
– Specific materials may have limitations in cold flexibility or short-term reboun…
– Some materials may not be suitable for high-pressure applications without back-u…

China O Rings Manufacturers and Suppliers

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 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, and quality inspection. The products comply with ISO 3601 standards and can be made from various materials including silicone, EPDM, fluoro rubber, Viton, and more. The company also provides options for liquid silicone rubber and ensures the products meet international safety standards like CE, SGS, REACH, and ROHS Directive requirements.

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 compliance with international safety standards.
– Wide range of materials available, including silicone, EPDM, fluoro rubber, and…
– Advanced equipment and experienced staff ensure reliable quality and timely deli…
– Low minimum order quantity (MOQ) and rapid prototyping options.

Cons:
– Importing from China may involve longer shipping times.
– Factory inspections may be limited due to epidemic restrictions, though online i…

Stainless O Ring Manufacturer in China – HM

Product Details: The Stainless Steel Non-Welded O Ring from HM is designed for strength and versatility. It is available in different sizes and finishes, and can be customized to meet specific requirements. The O rings are made from various grades of stainless steel, ensuring durability and resistance to corrosion. They are suitable for a wide range of applications, including industrial, marine, and other environments where high reliability is necessary.

Pros:
– Designed for strength and versatility
– Available in different sizes and finishes
– Customizable to meet specific requirements
– Made from durable and corrosion-resistant stainless steel
– Suitable for various applications including industrial and marine environments

Cons:
– No specific cons mentioned on the webpage
– Potential for higher cost due to customization and high-quality materials

Custom O-Rings, Custom Molded O-Ring China …

Product Details: Custom o-rings can be made from the same materials, hardness, and colors as standard o-rings. Materials include NBR, HNBR, FKM/Viton, and others. Custom o-rings are defined by their cross-section and outline shape. If the cross-section is outside standard ranges or the shape is not round (e.g., square, rectangular), it is considered a custom o-ring. To produce custom o-rings, the inner diameter (ID) and cross-section (CS) are required, or a detailed drawing if the shape is irregular. Savvy offers strong cost control, keeping prices low while maintaining high quality. Custom o-rings are used in various industries such as hydraulics, oil and

gas, semiconductor processing, aerospace, food processing, and more.

Pros:
– Customizable to specific sizes and shapes
– Available in various materials (NBR, HNBR, FKM/Viton, etc.)
– Strong cost control with low prices
– High-quality production
– Wide range of applications across different industries
– Ability to design and produce according to customer drawings

Cons:
– Higher price compared to standard o-rings due to lower volume production
– Requires detailed communication and cooperation for irregular shapes
– May require longer lead times for custom designs

China car o ring Manufacturers Factory Suppliers

Product Details: The car O-rings from XinRuiTuo are made from polyurethane and other specialized materials. These O-rings are designed for use in various automotive applications, including hydraulic systems, engine components, and other critical areas. They are characterized by their good sealing performance, abrasion resistance, corrosion resistance, and adaptability. The O-rings can operate over a wide range of temperatures and pressures, from -60℃ to +220℃, making them suitable for diverse working conditions. They are also available in customized sizes and shapes to meet specific customer needs[1].

Pros:
– Good sealing performance, abrasion resistance, and corrosion resistance
– Adaptability to various working conditions and temperatures
– Simple installation and disassembly due to their unique O-shape structure
– Customizable to meet specific customer requirements
– High elastic behavior and optimal contact pressure

Cons:
– Limited information on specific cons, but general considerations might include t…
– Potential for wear and tear over time, especially in high-pressure or dynamic ap…

O Ring Kits – China Supplier, Wholesale

Product Details: The O-Ring Kits available on the website include various types of O-rings made from different materials such as NBR (Nitrile Rubber) and FKM (Viton). The kits come in different quantities, with options like 240 PCS, 320 PCS, 364 PCS, and 382 PCS. The O-rings are available in various hardness levels, typically 70 +/- 5 Shore A. The kits are designed for various applications, including air-conditioning and truck maintenance. The O-rings are color-coded and come in colors such as black, green, blue, yellow, and more. They adhere to AS568 standards and have certifications like FDA, ISO, and ROHS.

Pros:
– Variety of materials and quantities available
– Color-coded for easy identification
– Adheres to AS568 standards
– Certified by FDA, ISO, and ROHS
– Suitable for multiple applications including air-conditioning and truck maintena…

Cons:
– Limited information on the specific temperature and chemical resistance of each…
– No detailed information on the packaging and storage recommendations
– No clear indication of the availability of custom sizes or special orders

Custom HNBR O-Ring Manufacturer in China

Product Details: HNBR O-rings are made from Hydrogenated Nitrile Butadiene Rubber, obtained by saturating the double bonds in nitrile’s butadiene segments with hydrogen. They are available in 70, 80, and 90 durometers and are preferable for use with petroleum-based oils and fuels, aliphatic hydrocarbons, vegetable oils, silicone oils and greases, ethylene glycol, water, and steam (up to 300ºF), and diluted acids, bases, and salt solutions. Standard HNBRs typically have 36% Acrylonitrile (ACN) content, which improves resistance to fuels and polar lubricants. They have a temperature range from -40°C to +150°C (-40°F to +302°F)[1][2][4].

Pros:
– Superior heat, ozone, and chemical resistance compared to standard Nitrile
– Excellent resistance to petroleum-based oils and fuels, aliphatic hydrocarbons,…
– Good performance in water and steam up to 300ºF
– Resistant to diluted acids, bases, and salt solutions
– High tensile strength and tear resistance
– Can be used in demanding applications such as automotive and industrial settings

Cons:
– Not preferable for use with chlorinated hydrocarbons, ketones, ethers, esters, a…
– Higher ACN content results in inferior low-temperature properties
– Sulfur-curing reduces heat resistance and causes an inferior compression set

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About Car O-Ring Factories in China

What materials do Chinese o-ring factories typically use for car o-rings?

Chinese o-ring factories often use a variety of materials to manufacture car o-rings, including nitrile rubber (NBR), ethylene propylene diene monomer (EPDM), fluorine rubber (FKM, FPM, VITON), silicone rubber (SIL, VMQ), and hydrogenated nitrile rubber (HNBR). These materials are chosen for their durability and resistance to different conditions such as high temperatures, chemicals, and petroleum.

Can I customize o-rings according to my specific needs?

Yes, you can customize o-rings to fit your specific requirements. Many Chinese o-ring manufacturers, such as Dongguan Hongju Silicone Rubber Products Co., Ltd. and Tianjin SWKS Technology & Development Co., Ltd., offer OEM and ODM services. This means you can provide your design drawings or specifications, and they will produce the o-rings accordingly.

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 depending on the manufacturer. Some companies have relatively low MOQs, such as 10-100 pieces, while others may require larger orders, typically in the range of 500-5,000 pieces. It’s always a good idea to check with the specific manufacturer for their MOQ policies.

Do Chinese o-ring factories provide any certifications or quality assurances?

Yes, many Chinese o-ring factories are certified with international standards such as ISO 9001, ISO 14001, IATF16949, and ISO 13485. These certifications ensure that the products meet high-quality and safety standards. Additionally, some factories have their own certified laboratories to develop and test compounds according to specific market requirements.

What kind of after-sales service can I expect from Chinese o-ring manufacturers?

You can expect comprehensive after-sales service from many Chinese o-ring manufacturers. Companies like Xiamen Flying Silicone Rubber Co., Ltd. and Dongguan Zhongsheng Rubber Products Co., Ltd. offer assistance before and after sales, including help with any issues you might encounter with the products. They also provide free samples for testing and ensure customer satisfaction throughout the process.