Are you looking for the best o-ring suppliers in China? With so many options available, choosing the right one can be overwhelming. In this article, we’ll compare the top o-ring supplier 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.

Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司

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

China O Rings Manufacturers and Suppliers

FKM O Rings, China NBR O Ring supplier

Perfluoroelastomer FFKM O ring Manufacturer

Product Details: FFKM O-rings are made of perfluoroelastomer compounds with a higher fluorine content than FKM fluoroelastomers. They are known for their excellent resistance to chemical corrosion, organic and inorganic acids, alkali, ester, ether, ketone, aldehyde, superheated water, and steam. The maximum operating temperature is 230 °C (446 °F), and they can be fabricated into various forms such as O-rings, diaphragms, gaskets, rubber strips, and rubber plates. Key mechanical properties include a hardness of Shore A 78, 100% modulus of 9.4 MPa, tensile strength of 15.9 MPa, elongation at break of 130%, and a compression set of 20.7% at 204 °C[1].

Pros:
– High temperature resistance up to 620 °F (326 °C)[1][3] – Excellent chemical resistance to a wide range of aggressive chemicals, including…
– Long service life and high reliability in both dynamic and static applications[3…
– Low off-gassing and extractable levels, making them suitable for clean and sensi…
– Excellent compression set resistance, ensuring long-term sealing efficiency[4]

Cons:
– Poor low temperature performance[3] – Significantly more costly than standard FKM materials[3] – Lower tensile strength compared to some other elastomers[4]

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

Product Details: Savvy manufactures a wide range of o-rings, including traditional standard o-rings, encapsulated o-rings, backup-rings, and x-rings. The o-rings can be made from various materials such as NBR, FKM (Viton), Silicone, EPDM, HNBR, CR, Aflas, etc. The temperature range for these o-rings varies by material, with Silicone o-rings operating from -70°C to 220°C. The hardness of the o-rings is measured in Shore A, typically ranging from 40 to 90, with Shore A 70 being commonly used. Savvy also offers custom o-ring production with low mold/tooling costs and fast delivery. O-rings are available in various colors, with standard colors including Black for

NBR, Green for HNBR, Brown for Viton, and Red/Transparent/White for Silicone.

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

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

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 products include rubber O-rings, O-ring kits, O-ring seals, silicone rubber O-rings, hydraulic seals, and oil seals.

Pros:
– One-stop 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 factory with modern machinery
– Affordable factory direct prices

Cons:
– No specific details on minimum order quantities (MOQ)
– No detailed information on lead times
– Limited information on after-sales support services

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 for sealing applications in hydraulic, pneumatic, and other industrial systems. Each kit usually includes a range of O-ring sizes, often organized in a hard-wearing storage box to keep the O-rings separated and easily accessible. The kits are used to prevent leaks of liquids and gases in static, dynamic, hydraulic, and pneumatic components.

Pros:
– Provides a wide range of O-ring sizes to cater to various applications.
– Made from high-quality materials to ensure superior sealing performance and dura…
– Customization options available to meet specific application requirements.
– Enhances system efficiency by preventing leaks and reducing friction.
– Convenient storage and organization of O-rings for easy access.

Cons:
– May not be suitable for safety-critical applications without additional certific…
– The variety of materials and sizes can be overwhelming for users without specifi…
– Storage boxes may take up significant space, especially for larger kits.

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

Rubber O Rings – China Supplier, Wholesale

Product Details: Rubber oil seals are used to prevent the leakage of lubricants, water, or other fluids from mechanical equipment. They are made from materials such as NBR, FKM, FPM, Silicone, and EPDM. These seals are designed for dynamic applications, particularly for sealing rotating shafts and are available in various types like TC, TG, SC, SB, and more. They consist of an outer case, a rubber or PTFE sealing lip, and a spring to ensure proper sealing.

Pros:
– Oil-resistant, heat resistant, abrasion-resistant, and aging resistant
– Effective in preventing fluid leakage and contamination
– Available in various materials to suit different applications
– Comply with international standards such as DIN 3760 and ISO 6194
– Customizable sizes and types to fit specific needs

Cons:
– Certain materials like NBR are not suitable for acidic environments or contact w…
– May require specific installation to ensure optimal performance
– Can be affected by high pressures and rotation speeds beyond their design limits
– Material degradation over time can reduce sealing effectiveness

Comparison Table

Frequently Asked Questions (FAQs)

What types of materials are commonly used by o-ring supplier factories in China?

O-ring supplier factories in China use a variety of materials to manufacture o-rings, including Nitrile (NBR), Fluororubber (FKM/Viton), Silicone, Ethylene Propylene Diene Monomer (EPDM), and Hydrogenated Nitrile Butadiene Rubber (HNBR). Each material has its own unique properties and is suited for different applications, such as NBR for general use, FKM for high-temperature and chemical resistance, and Silicone for medical and food industries.

Can Chinese o-ring factories provide customized o-rings according to my specifications?

Yes, many o-ring factories in China offer customized o-ring services. They can produce o-rings in various sizes, shapes, and materials based on your specific requirements. Companies like Dongguan Hongju Silicone Rubber Products Co., Ltd. and Savvy Rubber provide OEM and ODM services, allowing you to customize the design, color, packaging, and even the logo of your o-rings.

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 factories have relatively low MOQs, such as 10-100 pieces, while others may require larger orders, typically ranging from 500 to 50,000 pieces. It’s always a good idea to check with the specific manufacturer for their MOQ policies.

Do Chinese o-ring manufacturers adhere to international quality and safety standards?

Yes, many Chinese o-ring manufacturers adhere to international quality and safety standards. Companies often hold certifications such as ISO 9001, ISO 13485, and IATF16949, ensuring that their products meet global standards. This includes using certified raw materials and maintaining quality control processes to guarantee the reliability and performance of their o-rings.

Can I get free samples from Chinese o-ring suppliers for testing before placing a large order?

Yes, some Chinese o-ring suppliers offer free samples for testing purposes. For example, Dongguan Hongju Silicone Rubber Products Co., Ltd. provides free samples to potential customers, allowing you to test the quality and performance of their o-rings before committing to a larger order. This can help you ensure that the products meet your requirements.