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 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

Product Details: The website https://www.oring-seal.com/ offers a variety of sealing products, including O-Rings, Quad-Ring® Seals, and Oil Seals. O-Rings are made from materials such as NBR, FKM, and EPDM, and are available in standard sizes with a hardness of 70±5 Shore A. They are certified to ISO9001:2008 and can operate in temperatures from -26°C to 250°C. Quad-Ring® Seals have a four-lipped profile, which prevents twisting in the groove and offers low friction and high sealing efficiency. Oil Seals, also known as shaft seals, are designed to prevent the leakage of lubricants and other fluids from machines and equipment. They are made from

materials like NBR, FKM, and silicone, and are available in various sizes and colors.

Pros:
– Versatile and reliable sealing performance
– Ability to withstand high pressure and temperature
– Resistance to chemicals and lubricants
– Ease of installation and low cost
– High sealing efficiency and low friction (Quad-Ring® Seals)
– Durability and longevity in harsh operating conditions (Oil Seals)
– Suitable for both static and dynamic sealing applications
– Good resistance to oils, fuels, and lubricants
– Cost-effective

Cons:
– Requires proper material selection and installation to ensure optimal performanc…
– May require periodic replacement due to wear and tear
– Can be affected by extreme environmental conditions if not made from the appropr…
– Quad-Ring® Seals may have higher production costs compared to O-Rings
– Oil Seals can be sensitive to incorrect installation, which may lead to prematur…

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

Product Details: Dongguan Hongju Silicone Rubber Products Co., Ltd. specializes in manufacturing custom silicone rubber products, including O-rings. The company uses various materials such as silicone, EPDM, fluoro rubber, Viton, Duprene, NBR, and nitrile. Their O-rings are designed for diverse applications, including electronic industrial parts, medical equipment, household products, and automotive components. The products comply with international safety standards like CE, FDA, SGS, and ROHS Directive requirements. The company offers OEM and ODM services, rapid prototyping within 3-5 work days, and low minimum order quantities (MOQ). Their production cycle typically ranges from 9-15 workdays, depending on the order quantity and complexity[2][3][4].

Pros:
– Compliance with international safety standards such as CE, FDA, SGS, and ROHS Di…
– Rapid prototyping available within 3-5 work days.
– Low minimum order quantities (MOQ).
– OEM and ODM services available.
– Environmentally friendly materials and processes.
– Experienced and certified staff with excellent English communication skills.
– Advanced equipment ensuring high quality and reliability of products.

Cons:
– Production cycle can vary from 9-15 workdays, which may be lengthy for urgent or…
– Factory inspections are currently limited due to the epidemic, with online inspe…

China O Rings Manufacturers and Suppliers

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% after 70 hours at

204 °C[1].

Pros:
– Highest temperature resistance up to 620 °F (327 °C)[1][3] – Excellent chemical resistance to a wide range of aggressive chemicals, including…
– High thermal, oxidative, and chemical stability due to carbon-fluorine bonds[1][…
– Long service life and reliability in dynamic and static applications[3][4] – Low off-gassing and extractable levels, making them suitable for clean and criti…

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

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 components. They provide one-stop OEM/ODM solutions, allowing for customization 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 certified compound materials to meet specific market requirements and have a certified laboratory for developing and identifying match compounds per customer specifications or ASTM D200 callouts[2].

Pros:
– One-stop OEM/ODM solution for all sealing needs
– Custom options for design, color, packaging, and logo
– Adherence to various international O-ring standards
– Use of certified compound materials
– Certified laboratory for compound development
– Affordable factory direct prices
– Rapid rubber products prototyping and emergency production
– IAFT 16949 certified with strict quality control standards

Cons:
– No specific cons mentioned on the website
– No information on potential lead times or minimum order quantities

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. These o-rings can be made from various materials such as NBR, FKM (Viton), Silicone, EPDM, HNBR, CR, and Aflas. The temperature range for these o-rings varies by material, with Silicone o-rings operating from -70°C to 220°C. The hardness of o-rings is measured in Shore A, typically ranging from 40 to 90, with Shore A 70 being commonly used. O-rings are available in various colors, and custom colors can be produced with a provided RAL or Pantone color number.

Pros:
– Good property and low cost, especially for NBR o-rings which make up about 50% o…
– FKM (Viton) o-rings offer the best comprehensive performance and are widely used…
– Silicone o-rings are tasteless, non-toxic, and resistant to high temperatures an…
– Easy to install, with the option for custom molds and fast delivery.
– Wear resistance, oil resistance, and corrosion resistance depending on the mater…

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, Silicone o-rings may not be su…

FKM O Rings, China NBR O Ring supplier

China O-Ring Kits Suppliers – NNK Oil Seal

Product Details: O-ring kit boxes are designed to provide a comprehensive range of O-rings in various sizes and materials. These kits typically include multiple pieces of O-rings made from materials such as NBR (Nitrile), Silicone, FKM, EPDM, and HNBR. The kits are organized in hard-wearing storage boxes, often with separate compartments for each size. They are widely used in industries for sealing purposes in hydraulic, pneumatic, and other high-pressure applications. The kits usually contain 382 pieces in 30 assorted sizes and are available in different color-coded boxes (e.g., yellow, blue, red)[1][2][4].

Pros:
– Provides a wide range of O-ring sizes and materials to meet various sealing need…
– High-quality materials ensure superior sealing performance and durability.
– 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 hydraulics and pneumatics.

Cons:
– May not be suitable for safety-critical applications without premium quality ass…
– The variety of sizes and materials can make selection complex for non-experts.
– Storage and organization of the O-rings require careful handling to maintain the…

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 by o-ring suppliers in China?

O-ring suppliers in China often use a variety of materials, including Nitrile (NBR), Fluorine rubber (FKM or Viton), Silicone (SIL or VMQ), EPDM, Hydrogenated Nitrile (HNBR), and Fluorosilicone (FVMQ). 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 I customize o-rings according to my specific needs?

Yes, you can customize o-rings to meet your specific requirements. Many Chinese o-ring suppliers offer OEM and ODM services, allowing you to specify the design, size, material, color, and packaging of the o-rings. They can also provide custom logos and meet specific international standards or your own specifications.

How do I ensure the quality of o-rings from Chinese suppliers?

To ensure the quality of o-rings, look for suppliers that have rigorous quality control measures in place. Many reputable suppliers have certificated laboratories to develop and test compounds according to your specifications or international standards like ASTM D200. They also conduct thorough testing and inspection before shipping the products.

What are the advantages of buying o-rings in bulk from Chinese suppliers?

Buying o-rings in bulk from Chinese suppliers can be highly cost-effective. Many manufacturers offer significant discounts for bulk orders, which can lead to substantial savings. Additionally, bulk purchasing can streamline your inventory management and reduce the frequency of orders, saving you time and resources.

How quickly can I expect delivery from Chinese o-ring suppliers?

Chinese o-ring suppliers often have efficient delivery systems in place. Many can arrange door-to-door courier services, offering fast and reliable delivery. Some suppliers also stock a wide range of o-rings, allowing for immediate or quick shipment of your orders, which can be particularly beneficial for urgent needs.