Are you looking for the best large O-ring factories in China? If so, you’re in the right place. In this article, we’ll compare some of the top O-ring manufacturers in China, highlighting their strengths, product ranges, and what sets them apart in the industry. Let’s dive in and find the perfect fit for your needs.

China O Rings Manufacturers and Suppliers

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 widely 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 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
– Options for using liquid silicone rubber and various hardness levels
– ISO 9001: 2008 certified and compliance with international safety standards like…

Cons:
– Importing from a Chinese manufacturer may involve longer shipping times
– Factory inspections may be limited due to epidemic restrictions, though online 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), Silicone, FKM, EPDM, and HNBR. These kits are designed for sealing applications in hydraulic, pneumatic, and other industrial systems. They usually include a range of O-ring sizes, often organized in hard-wearing storage boxes 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[1][2][4].

Pros:
– Provides a wide range of O-ring sizes to meet various application needs
– Made from high-quality materials to ensure superior sealing performance and dura…
– 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 petrochemical, mechanical m…

Cons:
– May not be suitable for safety-critical applications without additional certific…
– Storage and organization can be cumbersome if not properly managed
– Material selection must be carefully considered to match the specific applicatio…

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

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 resistance, especially for Silicone o-rings which can handle te…
– Good chemical compatibility with various elements depending on the material chos…
– Low mold/tooling costs for custom o-ring production.
– Fast delivery options available.
– Wide range of materials to choose from, including FDA-grade Silicone for medical…
– High wear resistance, oil resistance, and corrosion resistance depending on the…

Cons:
– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p…
– High hardness o-rings can be inconvenient to install.
– Specific materials have limitations; for example, NBR o-rings may not be suitabl…

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), Ethylene Propylene (EPDM), Hydrogenated Nitrile (HNBR), Silicone (VMQ), and others. Each material type is tailored for specific applications: FKM O-rings are excellent for oil & gas, dynamic, and general industrial applications due to their compatibility with oils, gases, hydraulic oil, and fuels. EPDM O-rings are focused on food & beverage, chemical processing, pharmaceutical, and general industrial applications. HNBR O-rings offer good mechanical robustness for automotive, heavy duty, transportation,

and general industrial uses. Silicone O-rings are compatible with PFPE, cold water, and ozone[5].

Pros:
– Wide range of materials to suit various applications, including high temperature…
– Ease of service with no smearing or retightening required, and no critical torqu…
– Compact and lightweight, requiring minimal space, and often reusable.
– Gradual failure mode that is easily identifiable.
– Cost-effective and reliable sealing solution.

Cons:
– Each material has specific compatibility limitations; for example, NBR is not co…
– Some materials, like Butyl rubber (IIR), have poor short-term rebound and limite…
– EPDM is not compatible with mineral oil, grease, or fuels, and has limited resis…
– Silicone O-rings have limited chemical resistance and are not suitable for high-…

Large silicone store o rings – Kin by Rice n Roll

Product Details: Kin by Rice n Roll is a sushi restaurant and the second restaurant project of the Rice n Roll Bistro family. It is located at 7484 W State St, Wauwatosa, WI 53213. The restaurant is known for its homemade, fresh, and tasty Asian food and sushi, with a modernized look and authentic taste from across Asia, especially Thailand and Japan.

Pros:
– Family-run restaurant with a passionate team
– Varieties of Asian food and sushi with modernized look and authentic taste
– Convenient location in Wauwatosa neighborhood

Cons:
– No specific product details available from the given URL
– Website review indicates some risk factors and suspicious activity[5]

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 ranges from 20 Shore A to 90 Shore A. The company, ORK, has two factories located in Shangrao City, Jiangxi Province, and Dongguan City, Guangdong Province. Products are certified with ISO9001, TS16949, CE, SGS, RoHS, and REACH. The temperature range for these O-rings varies by material, e.g., -40℃ to 110℃ for NBR and

-18℃ to 326℃ for FFKM. Applications include automotive, construction machinery, machine tool equipment, food, health, water treatment, and chemical processing[1][4][3].

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.
– Wide range of materials and sizes available, including non-standard sizes.
– Immediate delivery possible due to large inventory of over 300 million O-rings.
– Good balance of desirable working properties such as low compression set, high t…

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…
– No specific mention of environmental sustainability or eco-friendly practices in…

30-80 Durometer colored elastic large diameter o-rings

Product Details: The 30-80 Durometer colored elastic large diameter o-rings are made from high-quality materials such as Nitrile rubber (NBR), Viton, and Silicone. These o-rings have a hardness range from 30 Shore to 80 Shore Durometer and are available in a wide range of sizes, with inner diameters (ID) from 0.8mm to 572mm and cross-sections from 0.4mm to 17.27mm. They are designed for various applications, including use in excavators, and offer properties such as good elasticity, high temperature resistance, abrasion resistance, and oil resistance.

Pros:
– Made from high-quality, durable rubber materials (NBR, Viton, Silicone).
– Wide range of sizes available (ID: 0.8~572mm, Cross Section: 0.4~17.27mm).
– High temperature resistance, abrasion resistant, and oil resistant.
– More than 1000 existing sizes, avoiding tooling costs.
– Available in various commonly used materials (Silicone, Neoprene, Nitrile, EPDM,…
– Good elastic and resilient properties.

Cons:
– No specific cons mentioned in the product details, but the hardness range may li…
– The need for precise selection of material and durometer to match the applicatio…

Stainless O Ring Manufacturer in China – HM

Product Details: The stainless steel O rings manufactured by HM involve a precision CNC machining process. The production starts with the selection of high-quality stainless steel material. These O rings are available in various grades, including 304, 316, and 316L, among others. They are designed for durability and resistance to corrosion, making them suitable for a wide range of applications such as industrial, marine, and aerospace industries.

Pros:
– Made from high-quality stainless steel for durability and corrosion resistance.
– Precision CNC machining ensures accurate and reliable performance.
– Available in various grades to suit different industry needs.
– Suitable for diverse applications including industrial, marine, and aerospace in…

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

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About Large O-Ring Factories in China

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

O-ring factories in China use a variety of materials to manufacture o-rings, including Nitrile (NBR), Hydrogenated Nitrile (HNBR), Ethylene Propylene Diene Monomer (EPDM), Fluorinated Rubber (FKM), Silicone, and more. Each material has its own unique properties and is suited for different applications, such as high-temperature resistance, chemical compatibility, or specific industrial uses.

Can Chinese o-ring factories produce custom-sized o-rings?

Yes, many Chinese o-ring factories offer custom sizing and shapes to meet your specific needs. They can produce o-rings according to your drawings or samples, and some even have thousands of molds available for different sizes and shapes. This flexibility allows you to get the exact o-ring you need for your application.

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

The minimum order quantities (MOQs) for o-rings can vary significantly depending on the manufacturer. Some factories have low MOQs, starting from as few as 10 pieces, while others may require orders of 500 to 50,000 pieces. It’s always a good idea to check with the specific manufacturer to see what their MOQ is.

Do Chinese o-ring manufacturers provide quality certifications and compliance with international standards?

Yes, many Chinese o-ring manufacturers hold various quality certifications such as ISO 9001, ISO 14001, IATF16949, and ISO 13485. They also comply with international standards like AS568, BS1516, DIN 3771, JIS B 2401, and ISO 3601. These certifications ensure that the products meet high-quality and safety standards.

How do Chinese o-ring factories handle shipping and delivery for international customers?

Chinese o-ring factories often have efficient shipping and delivery systems in place for international customers. They can arrange door-to-door courier services, and some even have favorable discounts with courier companies to keep costs low. This ensures that your o-rings are delivered quickly and at a reasonable cost.