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 manufacturers in China, highlighting their unique 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)

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. 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 with a tolerance of plus or minus 3-5A[1].

Pros:
– High-quality silicone rubber O-rings and high-temperature O-ring seals
– Custom-made O-rings available to meet specific customer needs
– Strict quality control and adherence to ISO 3601 standards
– Use of high-quality raw materials and advanced equipment
– Wide range of applications including engines, pumps, and valves
– Options for different hardness levels and materials such as liquid silicone rubb…
– Fast production and shipping times

Cons:
– Importing from China may involve longer shipping times compared to local supplie…
– Quality inspection and testing may require additional time and resources
– Custom orders may have minimum order quantities (MOQ) requirements

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, including organic and inorganic acids, alkali, ester, ether, ketone, aldehyde, superheated water, and steam. The maximum operating temperature is 230 °C (446 °F). These O-rings can be manufactured into various forms such as O-rings, diaphragms, gaskets, rubber strips, and rubber plates. They are ideal for harsh chemical environments and are used in industries like semiconductor, petrochemical, mechanical seal, instrumentation, energy, biopharmaceutical, food, and medical industries[1].

Pros:
– High temperature resistance up to 230 °C (446 °F)[1] – Excellent chemical resistance to a wide range of aggressive chemicals including…
– High thermal stability and oxidative stability due to carbon-fluorine bonds[1][3…
– Long service life and reliability in dynamic and static applications[2][3][4] – Versatile applications in various industries such as chemical processing, oil an…

Cons:
– Higher cost compared to standard FKM materials[4] – Poor low-temperature performance, with some materials not suitable for steam, ho…
– Limited flexibility in cold temperatures, with some materials having a cold flex…

China O Rings Manufacturers and Suppliers

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, and more. 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 60-70 being the most common. O-rings are available in various colors and can be customized to meet specific needs. Savvy also offers fast delivery and competitive pricing due to their

large inventory and favorable courier rates.

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 through door-to-door courier
– Competitive pricing due to large inventory and favorable courier rates
– Good wear resistance, oil resistance, and corrosion resistance depending on the…

Cons:
– Low hardness o-rings can be prone to peeling, installation damage, extrusion, an…
– High hardness o-rings can be inconvenient to install
– Specific materials have limitations, such as NBR not being suitable for high-tem…

O Rings Manufacturer | O Rings Supplier – Hongjie Rubber Seal

Product Details: Hongjie Sealing Technology Co., Ltd offers a wide range of O-ring products, including custom O-rings, rubber O-rings, silicone rubber O-rings, and other sealing devices. They provide one-stop OEM/ODM solutions with options for custom 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 ensure product quality and have a certified laboratory to develop and identify compounds per customer specifications or ASTM D200 callouts.

Pros:
– One-stop OEM/ODM solution with custom options for design, color, packaging, and…
– Adherence to various international O-ring standards
– No need for additional tooling investment for most sizes
– Use of high-quality raw materials from well-known suppliers
– Certified laboratory for compound development and identification
– Rapid rubber products prototyping and emergency production capabilities
– IAFT 16949 certified with strict inspection standards

Cons:
– No specific details on minimum order quantities (MOQ) or pricing provided on the…
– Limited information on the range of materials available beyond standard and sili…

FKM O Rings, China NBR O Ring supplier

Product Details: The products offered by www.o-ringsseals.com include a wide range of O-ring seals made from various materials such as NBR, FKM, EPDM, HNBR, ACM, NR, and SIL. These O-rings are available in customized sizes, including metric and inch standards, and comply with various international standards like AS568, JIS-B2401, DIN-3771, BS-1516, and ISO3601. The hardness range is from 20 Shore A to 90 Shore A. The company, Rui Chen Sealing Co., Ltd, has two factories in China and adheres to ISO9001, TS16949, FDA, RoHS, and REACH certifications. The products are used in diverse applications including automotive, construction machinery, machine tool equipment, food,

health, water treatment, and chemical processing[1][3][4].

Pros:
– All manufacturing processes conform to ISO-9001 standards, ensuring high quality…
– Excellent shock-proof, heat insulation, and sound insulation performance.
– Customizable specifications, packing requirements, and colors according to custo…
– High flexibility and anti-compressive deformation, along with excellent chemical…
– Long lifetime of components, with certifications from ISO9001, CE, SGS.
– Quick response to inquiries within 24 hours and experienced staff for customer s…
– Wide range of materials and sizes available, including non-standard sizes.
– Immediate delivery from a large inventory of over 300 million O-rings.

Cons:
– Minimum Order Quantity (MOQ) requirements, which can be a barrier for small orde…
– Payment terms require 100% payment in advance for orders under $1000 (or $2000 i…

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 (Viton), 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
– Suitable for many industrial applications, including static, dynamic, hydraulic,…

Cons:
– May not be suitable for safety-critical applications like automotive without pre…
– Higher quality kits can be more expensive compared to lower quality alternatives
– Lead times for custom orders can range from 10 to 30 days depending on the manuf…

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

Viton O Ring Suppliers, Manufacturers, Factory

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About O-Ring Suppliers in China

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

Chinese O-ring manufacturers often use a variety of materials, including Nitrile Butadiene Rubber (NBR), Fluororubber (FKM or Viton), Silicone, Ethylene Propylene Diene Monomer (EPDM), and Hydrogenated Nitrile Butadiene Rubber (HNBR). Each material has its own unique properties and is chosen based on the specific application and working conditions.

Can I get custom O-rings made according to my specifications?

Yes, many Chinese O-ring suppliers offer OEM and ODM services, allowing you to customize your O-rings according to your specifications. You can choose from various designs, colors, and materials, and even request custom packaging and logos. This flexibility ensures you get the exact product you need for your application.

What is the typical lead time for ordering O-rings from Chinese suppliers?

The lead time can vary depending on the supplier and the complexity of your order. Generally, peak season lead times can be within 15 workdays, while off-season lead times might take around a month. Some suppliers also offer expedited services for prototypes or urgent orders.

Do Chinese O-ring suppliers provide free samples for testing?

Yes, several Chinese O-ring suppliers offer free samples for testing. This allows you to evaluate the quality and performance of the O-rings before placing a larger order. It’s a good practice to ask about sample policies when contacting potential suppliers.

Are the O-rings produced by Chinese suppliers compliant with international standards?

Many Chinese O-ring suppliers ensure their products comply with various international standards such as AS568 (USA), BS1516 (UK), DIN 3771 (Germany), JIS B 2401 (Japan), ISO 3601 (International), and GB 3452.1 (China). They also have certified laboratories to develop and test compounds according to specific market requirements.