Are you looking for the best o-ring manufacturers in China to meet your specific needs? With numerous options available, it can be overwhelming to choose the right one. In this article, we will compare some of the top o-ring manufacturing factories in China, highlighting their unique strengths, product offerings, and what sets them apart from the rest. Let’s dive in and find the perfect fit for your requirements.

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 and custom-made O-rings to meet specific customer needs. The manufacturing process includes design, tool making, color mixing, compression molding, and quality inspection. Hongju adheres to ISO 3601 standards for dimensions and tolerances and uses high-quality raw materials. The company also provides options for using liquid silicone rubber and offers different hardness levels for the O-rings[1].

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 applications including engines, pumps, cylinders, and valves
– Use of advanced equipment and environmentally friendly materials
– Certifications such as ISO 9001: 2008, CE, FDA, and ROHS Directive requirements[…

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

Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司

China O Rings Manufacturers and Suppliers

FKM O Rings, China NBR O Ring supplier

O Rings Manufacturer | O Rings Supplier – Hongjie Rubber Seal

Product Details: Hongjie Sealing Technology offers a one-stop OEM/ODM solution for O-rings. They provide custom options in design, color, packaging, and logo. The company adheres to various international O-Ring standards, and most sizes are already tooling, eliminating the need for additional investment. They use well-known raw material suppliers to guarantee product quality and have certified compounds to meet specific market requirements. Their laboratory develops and identifies match compounds per customer specifications or ASTM D200 callouts.

Pros:
– One-stop O-rings OEM/ODM solution
– Custom options: design, color, packaging, logo
– Adherence to various international O-Ring standards
– No need for additional tooling investment
– Use of high-quality raw materials
– Certified compounds for specific markets
– State-of-the-art laboratory for compound development

Cons:
– No specific cons mentioned on the website

Perfluoroelastomer FFKM O ring Manufacturer

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

Product Details: Savvy manufactures a wide range of o-rings made from various materials including NBR, FKM (Viton), Silicone, EPDM, HNBR, CR, Aflas, and more. These o-rings are available in both imperial and metric sizes and can be customized to meet specific needs. The temperature range for these o-rings varies by material, such as -70°C to 220°C for Silicone and -15°C to +300°C for Viton. The hardness of the o-rings is measured in Shore A, typically ranging from 60 to 90, with 70 being the most commonly used. Savvy also offers o-rings in various colors and can produce them in custom colors upon

request.

Pros:
– Good property and low cost, especially for NBR which accounts for about 50% of o…
– High-temperature resistance, with Silicone o-rings capable of withstanding tempe…
– Wide range of material options to suit different working conditions and applicat…
– Customizable sizes and shapes, including encapsulated o-rings, backup-rings, and…
– Fast delivery and low mold/tooling costs for custom orders.

Cons:
– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p…
– High hardness o-rings can be inconvenient to install.
– Unique or custom colors may increase the cost and require a larger minimum order…

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), FKM, EPDM, and Silicone. These kits are designed to provide a wide range of O-ring sizes for different applications, including sealing liquid and gaseous media in high-pressure environments. Each kit usually includes multiple sizes of O-rings, often organized and stored in a durable box. For example, kits like the 5A, 5B, and 5C from Kesaria Rubber Industries contain 382 pieces in 30 assorted sizes, available in NBR and Silicone materials[1][2][4].

Pros:
– Provides a wide range of O-ring sizes for various applications
– Made from high-quality materials ensuring superior sealing performance
– Customization options available to meet specific requirements
– Enhances system efficiency by preventing leaks and reducing friction
– Durable storage boxes to keep O-rings organized and protected

Cons:
– May not be suitable for safety-critical applications like automotive
– Higher quality kits can be more expensive compared to lower quality alternatives
– Lead times for custom orders can range from 10 to 30 days

Xiamen Seals Technology Co.,Ltd: China O-Rings, X-Rings …

Product Details: Xiamen Seals Technology Co., Ltd. offers a variety of sealing products including Silicone Custom Rubber Parts, Buna-N Standard O-Rings, Spliced and Vulcanized O-Rings, Colored EPDM O-Rings, and HNBR Rubber O-Rings. The company provides a complete production chain from R&D, rapid prototypes, mould design, mould making, components production, assembling, and packing. Their products are used in various applications and are available in both standard and metric sizes. The silicone custom rubber parts are FDA certified, and the company welcomes customer drawings and samples to customize parts according to specific needs.

Pros:
– Complete production chain from R&D to export
– High-quality molded rubber products
– FDA certification for silicone custom rubber parts
– Custom design options based on customer specifications
– Wide range of materials and sizes available
– Cost-effective options like Colored EPDM O-Rings

Cons:
– Limited information on specific product durability and lifespan
– No detailed pricing information available on the website
– Dependence on customer-provided specifications for custom designs

Custom FEP O-ring Manufacturer in China

Product Details: YOSON FEP O-rings are produced from fluorocarbon or silicone with seamless FEP jackets. They are certified to ISO 3601, BS 4528, and AS 568 standards and are available in both inch and metric sizes. These O-rings are designed to solve sealing problems due to their low friction, chemical resistance, and elastic properties. They offer excellent temperature resistance from -60°C to +260°C and are manufactured from FDA, USP Class VI compliant materials, and Sanitary 3A compliant materials. The FEP O-rings are used in various applications including automotive, industrial, medical, agriculture, and more.

Pros:
– High corrosion resistance
– Excellent temperature resistance from -60°C to +260°C
– Low friction and chemical resistance
– Elastic properties for effective sealing
– Available in various colors and customized designs
– FDA, USP Class VI, and Sanitary 3A compliant materials
– Used in diverse industries such as automotive, industrial, medical, and agricult…

Cons:
– The fluoropolymer jacket’s slight stiffness can require custom gland design for…
– May require specific installation and application design to maintain sealing per…

Comparison Table

Frequently Asked Questions (FAQs)

What types of materials are commonly used in o-ring manufacturing in China?

In China, o-ring manufacturers often use a variety of materials to cater to different applications. The most common materials include Nitrile (NBR), Fluorinated Rubber (FKM or Viton), Silicone, Ethylene Propylene Diene Monomer (EPDM), and Hydrogenated Nitrile Butadiene Rubber (HNBR). Each material has its unique properties and is chosen based on the specific requirements of the application, such as temperature resistance, chemical compatibility, and durability.

Can Chinese o-ring manufacturers provide custom sizes and designs?

Yes, many o-ring manufacturers in China offer custom sizes and designs to meet your specific needs. These manufacturers have extensive mold libraries and can produce o-rings according to your drawings or samples. They also provide OEM and ODM services, allowing you to customize the design, material, color, and packaging of the o-rings. This flexibility ensures you get the exact product you need for your application.

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. While some manufacturers have higher MOQs, such as 500 to 5,000 pieces, others can accommodate lower MOQs, sometimes as low as 10 to 100 pieces. It’s always a good idea to check with the specific manufacturer you’re interested in to understand their MOQ requirements.

Do Chinese o-ring manufacturers adhere to international standards?

Yes, many o-ring manufacturers in China adhere to international standards such as AS568 (USA), BS1516 (UK), DIN 3771 (Germany), JIS B 2401 (Japan), ISO 3601 (International), and GB 3452.1 (China). These manufacturers also hold various certifications like ISO 9001, ISO 14001, IATF16949, and ISO 13485, ensuring the quality and reliability of their products.

Can I get free samples from Chinese o-ring manufacturers for testing?

Yes, several Chinese o-ring manufacturers offer free samples for testing purposes. This allows you to evaluate the quality and performance of the o-rings before placing a larger order. Manufacturers like Dongguan Hongju Silicone Rubber Products Co., Ltd., and others provide this service to build trust and ensure customer satisfaction with their products.