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 manufacturer 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.

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.
– Compliance with international safety standards such as CE, SGS, REACH, and ROHS…
– Strict quality control over the production process.
– Wide range of materials available including silicone, EPDM, fluoro rubber, Viton…
– ISO 9001: 2008 quality management system certification.

Cons:
– Importing products from China may involve longer shipping times.
– Limited information on minimum order quantities (MOQ) on the specific page, thou…

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

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 more. These O-rings are available in customized sizes, including standard AS568 and ISO 3601 sizes, as well as non-standard sizes. The hardness range is from 20 Shore A to 90 Shore A. The products are certified with ISO9001, TS16949, CE, SGS, RoHS, and REACH. They are used in various applications including automotive, construction machinery, machine tool equipment, food, health, water treatment, and chemical processing. The company, Rui Chen Sealing Co., Ltd., has two factories located

in Guangdong and Jiangxi provinces in China and offers services such as mold development and design assistance to customers[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 well-known manufacturers.
– Experienced staff available to answer inquiries in fluent English.
– Fast response time, with inquiries replied within 24 hours.
– Ability to produce OEM products based on customer drawings or samples.
– Wide range of materials and sizes available, including high-pressure and low-tem…

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…

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 specific sizes and shapes. Savvy offers fast delivery and competitive pricing due to their

extensive mold inventory and favorable courier rates.

Pros:
– High-temperature and FDA food grade options available
– Wide range of materials to suit different working conditions
– Good wear resistance and oil resistance
– Easy to install
– Customizable sizes and shapes at low mold/tooling costs
– Fast delivery options

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 may have limitations, such as Silicone’s general use of Shore…

O Rings Manufacturer | O Rings Supplier – Hongjie Rubber Seal

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

Viton O Ring Suppliers, Manufacturers, Factory

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 type is tailored for specific applications: NBR for oils and gases, FKM for explosive decompression and oil & gas, EPDM for food & beverage, chemical processing, and pharmaceutical applications, HNBR for automotive and heavy-duty use, and Silicone for PFPE, cold water, and ozone compatibility[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 failure mode that is easily identifiable

Cons:
– Material compatibility issues with certain fluids and chemicals (e.g., NBR not c…
– Specific materials may have limitations in low-temperature flexibility or short-…
– Some materials may not be suitable for high-pressure applications without back-u…

China O-Ring Kits Suppliers – NNK Oil Seal

Product Details: O-ring kit boxes are comprehensive sets containing various sizes of O-rings, designed for sealing purposes in industrial, mechanical, and hydraulic applications. These kits typically include a range of O-ring sizes, often organized in a hard-wearing storage box. The O-rings are made from different materials such as NBR (Nitrile), Silicone, FKM, EPDM, and HNBR, each with specific temperature and durability characteristics. The kits are available in different configurations, such as metric, inch, and AS568A sizes, and can be customized to meet specific application needs[1][2][4].

Pros:
– Provides a wide range of O-ring sizes for various applications, ensuring versati…
– Made from high-quality materials that offer superior sealing performance and dur…
– Customization options available to tailor the kit to 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…
– The cost can be higher compared to lower-quality alternatives, although the qual…
– Storage and organization of the O-rings can be complex if not properly managed.

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About O-Ring Supplier Factories in China

What types of materials are commonly used by Chinese O-ring manufacturers?

Chinese O-ring manufacturers often use a variety of materials, including Nitrile (NBR), Fluorinated Rubber (FKM or 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 high-temperature resistance, chemical compatibility, or food and medical use.

Do Chinese O-ring manufacturers offer customized products?

Yes, many Chinese O-ring manufacturers provide customized products. Companies like Dongguan Hongju Silicone Rubber Products Co., Ltd. and Savvy Rubber offer OEM and ODM services, allowing you to customize the design, color, packaging, and even the material of the O-rings according to your specifications.

What are the typical minimum order quantities (MOQs) for O-rings from Chinese suppliers?

The minimum order quantities (MOQs) can vary widely among Chinese suppliers. Some companies, like Xingtai Baifu Seal Co., Ltd., may have an MOQ as low as 10 pieces, while others, such as Shangrao Ruichen Sealing Co., Ltd., may require orders of 5,000 pieces or more.

Do Chinese O-ring manufacturers adhere to international quality standards?

Yes, many Chinese O-ring manufacturers adhere to international quality standards. Companies like Shangrao Ruichen Sealing Co., Ltd. and Cixi Lixu Rubber Products Co., Ltd. are certified with ISO 9001, ISO 14001, IATF16949, and other international standards, ensuring the quality and reliability of their products.

How can I ensure the quality of the O-rings before placing a large order?

To ensure the quality of the O-rings, you can request free samples from the manufacturer for testing. Companies like Dongguan Hongju Silicone Rubber Products Co., Ltd. offer free samples, allowing you to evaluate the product quality before committing to a larger order. Additionally, look for manufacturers with certified laboratories and advanced testing equipment to guarantee the products meet your requirements.