Are you looking for the best automotive O-ring manufacturers in China? With so many options available, it can be overwhelming to choose the right one. In this article, we’ll compare the top automotive O-ring factories in China, highlighting their expertise, product quality, and what sets them apart in the industry. Let’s dive in and find the perfect fit for your needs.

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 has specific applications: NBR O-rings are compatible with oils and gases; FKM O-rings are suitable for explosive decompression, oil & gas, and dynamic applications; EPDM O-rings are focused on food & beverage, chemical processing, and pharmaceutical applications; HNBR O-rings offer good mechanical robustness for automotive and heavy-duty applications; and Silicone O-rings are compatible with PFPE,

cold water, and ozone[5].

Pros:
– Wide range of materials to suit various applications
– High compatibility with different fluids, gases, and chemicals
– Ease of service with no smearing or retightening required
– No critical torque on tightening, reducing structural damage risk
– Compact and lightweight design
– Cost-effective and reusable in many cases
– Gradual and easily identifiable failure mode
– Excellent resistance to high temperatures, ozone, and chemicals in certain mater…

Cons:
– Specific materials have limitations in compatibility (e.g., NBR not compatible w…
– Some materials have poor short-term rebound or cold flexibility (e.g., Butyl rub…
– Requires careful selection of material to match the application environment to e…
– Certain materials may not be suitable for high-pressure applications without bac…

FKM O Rings, China NBR O Ring supplier

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

China O Rings Manufacturers and Suppliers

China O-Ring Kits Suppliers – NNK Oil Seal

Product Details: O-ring kit boxes are comprehensive sets containing various sizes of O-rings, typically made from materials such as NBR (Nitrile), Silicone, FKM, EPDM, and HNBR. These kits are designed to provide a wide range of O-ring sizes, often organized in hard-wearing storage boxes. They are used in numerous industrial applications, including connectors, cylinders, pumps, and valves, to seal joints and prevent the leakage of liquids and gases. The kits usually include 30 to 40 different sizes, with total piece counts ranging from 382 to over 400 pieces[1][2][4].

Pros:
– Provides a wide range of O-ring sizes, making them versatile for various applica…
– Made from high-quality materials to ensure superior sealing performance and dura…
– Customization options are available to tailor the kit to specific requirements.
– Enhances system efficiency by preventing leaks and reducing friction.
– Suitable for both static and dynamic, hydraulic and pneumatic components.

Cons:
– May not be suitable for safety-critical applications like automotive without pre…
– The variety of sizes and materials can make selection complex for non-experts.
– Higher quality kits may have a longer lead time for delivery and could be more e…

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’s butadiene segments, enhancing their heat, ozone, and chemical resistance. They are available in 70, 80, and 90 durometers and typically have 36% Acrylonitrile (ACN) content. These O-Rings are peroxide-cured, though they can also be sulfur-cured for improved flexibility in dynamic systems. They perform well in temperatures ranging from -40°C to +302°F (-40°F to +302°F) and are suitable for use with petroleum-based oils, fuels, aliphatic hydrocarbons, vegetable oils, silicone oils and greases, ethylene glycol, water, and steam up to 300°F.

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

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

Stainless O Ring Manufacturer in China – HM

Product Details: The manufacturing process of stainless steel O rings at HM involves precision CNC machining, starting with the selection of high-quality stainless steel material. HM offers custom and standard designs to cater to various industries. The O rings are made from different grades of stainless steel, including 302, 303, 301, 304, 304L, 316, and 316L. These O rings are known for their corrosion resistance, high strength, and durability, making them suitable for applications in marine, chemical, and other harsh environments.

Pros:
– Made from high-quality stainless steel material for corrosion resistance and hig…
– Custom and standard designs available to meet various industry needs.
– Precision CNC machining ensures high accuracy and reliability.
– Suitable for use in harsh environments such as marine and chemical industries.

Cons:
– No specific cons mentioned on the website, but general considerations might incl…

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

Product Details: Savvy Rubber offers custom o-rings designed and produced in various cross-sections and shapes. These o-rings are defined as custom if their cross-section is outside the range of standard o-rings or if their outline shape is not round, but rather square, rectangular, or other irregular shapes. To produce these custom o-rings, the inner diameter (ID) and cross-section (CS) are required for round shapes, while a detailed drawing is necessary for non-round shapes. The materials used include NBR, FKM, and Silicone, among others, each with different properties and applications. Custom o-rings are used in industries such as hydraulics, oil and gas, semiconductor

processing, aerospace, food processing, and more.

Pros:
– Custom o-rings can be tailored to specific application requirements, ensuring a…
– Savvy Rubber has strong cost control management, offering competitive pricing wh…
– The company can design and produce custom o-rings with low mold/tooling costs an…
– Custom o-rings are available in various materials to meet different working cond…

Cons:
– Custom o-rings are used in lower volumes than standard o-rings, resulting in hig…
– The production process requires detailed communication and cooperation, especial…
– Unique or non-standard colors may increase the cost and require a larger minimum…

China Supplier, Wholesale – FKM O Rings

Product Details: FKM (Fluorocarbon) O-rings are made from a high-performance fluoroelastomer, known by the brand name Viton®. They are composed of vinylidene fluoride (VF2) and hexafluoropropylene (HFP), containing 66% – 70% fluorine. These O-rings operate within a temperature range of -15°F to 400°F (-26°C to 204°C), with some formulations extending this range. They are available in various durometer hardness levels, typically ranging from 55 Shore A to 95 Shore A, with 75 Shore A being the most common. FKM O-rings are highly resistant to oils, fuels, lubricants, solvents, ozone, UV light, and weathering.

Pros:
– Excellent resistance to high temperatures up to 400°F (204°C)
– Superior chemical resistance to oils, fuels, lubricants, and solvents
– High durability in harsh environments
– Good low-temperature flexibility down to -15°F (-26°C) or lower with special for…
– Resistant to ozone, UV light, and weathering
– Wide range of applications including aerospace, automotive, and chemical process…

Cons:
– Incompatible with certain substances such as amines, glycol-based brake fluids,…
– Cannot be used with steam, polar solvents, or fireproof hydraulic fluids
– May require specific lubrication for optimal performance
– More expensive than some other sealing materials like nitrile or EPDM

O-Ring Kits – China Manufacturer & Supplier – Savvy

Product Details: Savvy supplies various o-ring kits, including metric and imperial sizes. The kits can be made from materials such as NBR, FKM, and PTFE. Each kit typically contains 382 or 386 o-rings in 30 different sizes. O-ring splicing kits are also available, which include 9 or 5 o-ring cords of different cross-sections, a splicing jig, a cutting tool, and adhesives. These kits allow users to fabricate o-rings for custom needs, particularly useful for emergency or temporary repairs. The kits are packaged in a plastic box for convenience.

Pros:
– Wide range of o-ring sizes and materials available
– Suitable for both metric and imperial measurements
– Splicing kits enable custom o-ring fabrication
– Convenient packaging with necessary tools and adhesives
– Cost-effective options, especially for nitrile (NBR) material

Cons:
– Spliced o-rings have relatively large tolerances and may not offer the best seal…
– Requires manual splicing, which can be time-consuming and may require multiple a…
– For non-emergency use, mould-pressed o-rings are recommended for better sealing…

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About Automotive O-Ring Factories in China

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

Chinese factories use a variety of materials for automotive O-rings, including Nitrile (NBR), Fluorine rubber (FKM, FPM, Viton), Silicone (SIL, VMQ), EPDM, Hydrogenated Nitrile (HNBR), Fluorosilicone (FVMQ), and AFLAS. Each material is chosen based on its specific properties to meet different application requirements, such as temperature resistance, chemical compatibility, and durability.

What are the standard sizes and customization options available for O-rings?

O-rings from Chinese factories come in standard sizes according to AS568 and ISO 3601 standards, but you can also customize them to fit your specific needs. Manufacturers like SWKS and NNK offer custom sizes based on your drawings or samples, ensuring the O-rings meet your exact specifications.

What quality certifications should I look for in a Chinese O-ring manufacturer?

When selecting a Chinese O-ring manufacturer, look for quality certifications such as ISO 9001, ISO 14001, IATF16949, and ISO 13485. These certifications indicate that the manufacturer adheres to international standards for quality management, environmental management, and safety.

How do Chinese O-ring manufacturers ensure the quality and reliability of their products?

Chinese O-ring manufacturers like NNK and Xlong Seal ensure quality by machine-testing every O-ring product. They guarantee no burrs, no damage, and maintained elasticity. Additionally, many manufacturers have rigorous quality control processes in place to ensure the O-rings meet the required standards for both static and dynamic sealing applications.

Can Chinese O-ring manufacturers provide O-ring kits and other sealing solutions?

Yes, many Chinese manufacturers offer O-ring kits that are ideal for maintenance applications. These kits come in various materials and sizes, helping to reduce maintenance and assembly time by eliminating the guesswork in part selection. Companies like NNK and Xiamen Seals Technology Co., Ltd. also provide other sealing solutions such as quad rings, back-up rings, oil seals, and piston seals.