Are you looking for the best o-ring manufacturers in China to meet your specific needs? With so many options available, choosing the right one can be overwhelming. In this article, we’ll compare the top o-ring factories in China, highlighting their strengths, product ranges, and what sets them apart. Let’s dive in and find the perfect fit for your business.

Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司

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 to maintain their condition. The kits are available in various configurations, such as metric, inch, and Japanese sizes, and can be customized to meet specific needs[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
– Durable storage boxes to keep O-rings organized and protected
– Suitable for many industrial applications, including high-pressure environments

Cons:
– May not be suitable for safety-critical applications like automotive without pre…
– Can be more expensive compared to purchasing individual O-rings
– Lead time for customization and delivery may vary

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

Product Details: Savvy manufactures a wide range of o-rings made from various materials including rubber, metal, and other materials. The most commonly used materials are NBR, FKM (Viton), and Silicone. NBR is widely used due to its good properties and low cost. FKM/Viton offers the best comprehensive performance and is used in high-standard sealing equipment. Silicone is often used in medical and food industries due to its FDA compliance, tastelessness, non-toxicity, and resistance to high temperatures and severe cold. The temperature range for these materials varies: -70°C to 220°C for Silicone, and different ranges for other materials. The hardness of o-rings is

measured in Shore A, typically ranging from 40 to 90, with 60-70 being the most common. O-rings can be produced in various colors, and custom colors are available with specific RAL or Pantone color numbers.

Pros:
– Good property and low cost for NBR o-rings
– Best comprehensive performance for FKM/Viton o-rings
– FDA compliance, tastelessness, and non-toxicity for Silicone o-rings
– High temperature and severe cold resistance for Silicone o-rings
– Wide range of materials available to suit different working conditions
– Custom o-rings can be made at low mold/tooling cost and fast delivery
– Various colors available for easy identification

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

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

Custom O Ring Manufacturing in China with Quick Tooling …

Product Details: OBTiv Technology Co., LTD offers a wide range of rubber seal products, including O-Rings, X-Rings, Y-Rings, gaskets, PTFE bonded rubber seals, and more. They follow the IATF 16949 standards for automotive O-ring seals and use APQP and PPAP procedures. The company has expertise in enhancing rubber performance for low-temperature, conductivity, and chemical resistance. They provide customized high-performance rubber solutions for various industrial applications, including thermal management systems, fuel lines, air conditioning systems, and more. Materials available include EPDM, FKM, FVMQ, and others, with options for large O-Rings (diameter > 500mm) and self-lubricated materials. They also support O-ring size calculation and

design.

Pros:
– Wide range of rubber seal products available
– Compliance with IATF 16949 standards for automotive applications
– Enhanced rubber performance for low-temperature, conductivity, and chemical resi…
– Customized high-performance rubber solutions
– Support for O-ring size calculation and design
– Options for large O-Rings and self-lubricated materials
– Quick sample and mass production turnaround times (within 2 weeks and 4 weeks re…

Cons:
– Limited information on specific material properties and durability
– No detailed pricing information available
– Dependence on specific manufacturing procedures which might limit flexibility in…

Your Guide to Design O-Ring Groove – Hongju Silicone

Rubber O-Rings Manufacturer in China – Lindas

Product Details: Lindas manufactures a series of O-rings in different rubber materials, such as NBR, EPDM, NR, SBR, and Silicone (VMQ). These O-rings are designed to meet various industry standards, including ISO9001. The company offers customization options to fit specific requirements, including different sizes, styles, materials, and colors. The O-rings are produced using state-of-the-art production technologies to ensure high quality and durability.

Pros:
– High durability and resistance to wear and tear
– Available in various rubber materials to suit different applications
– Customization options for sizes, styles, materials, and colors
– Meets ISO9001 and other industry standards
– Excellent technical support, fast delivery, and professional after-sales service…
– Cost-effective and competitive pricing

Cons:
– Specific limitations of each rubber material (e.g., NBR is incompatible with cer…
– Temperature range limitations for each material (e.g., NBR up to 212°F or 100°C…

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 designed to meet various industrial standards and can be customized to fit specific requirements. They are known for their durability, corrosion resistance, and ability to withstand high temperatures and pressures.

Pros:
– Made from high-quality stainless steel material
– Precision CNC machining ensures high accuracy and reliability
– Corrosion resistant and durable
– Can withstand high temperatures and pressures
– Customizable to fit specific industrial needs

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

Design of O-ring and its groove

Product Details: The design of an O-ring and its groove involves several key considerations. The groove shape should be rectangular, neither too narrow nor too wide, to avoid high frictional resistance and abnormal wear. The cross-sectional area of the O-ring should account for at least 85% of the groove’s cross-sectional area. The groove width must be greater than the maximum diameter of the O-ring after compression deformation. The design also includes determining the shape, size, accuracy, and surface roughness of the groove. For static sealing, the roughness of the groove wall should be Ra=6.3~3.2 μm, while for dynamic sealing, it should be

Ra=1.60 μm or lower. Fillets at the bottom of the groove help avoid stress concentration and scratches during assembly[2].

Pros:
– Proper groove design ensures optimal sealing performance and extends the service…
– The use of fillets and rounded corners prevents stress concentration and scratch…
– Appropriate surface roughness of the groove wall improves the sealing performanc…

Cons:
– If the groove is too wide, it can lead to abnormal wear and failure of the O-rin…
– High frictional resistance can occur if the groove is too narrow, causing seriou…
– Improper design can result in permanent deformation of the O-ring material, lead…

O-Ring Kits – China Manufacturer & Supplier – Savvy

Product Details: Savvy supplies various o-ring kits, including metric and imperial sizes. The kits can be made from materials such as NBR, FKM, and PTFE. Each kit typically contains 382 or 386 o-rings in 30 different sizes. O-ring splicing kits are also available, which include 9 or 5 o-ring cords of different cross-sections, a splicing jig, a cutting tool, and adhesives. These kits allow users to fabricate o-rings by cutting and gluing the cord. The kits are suitable for emergency repairs but may have larger tolerances compared to mould-pressed o-rings.

Pros:
– Wide range of o-ring sizes and materials available
– Convenient o-ring splicing kits for on-the-job repairs
– No special skills required for splicing
– High-quality o-rings with accurate sealing performance
– Customizable kits to meet specific customer needs

Cons:
– Spliced o-rings have relatively large tolerances
– Higher cost for FKM material compared to NBR
– Installation and use of spliced o-rings may require additional steps

Comparison Table

Frequently Asked Questions (FAQs)

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

O-ring manufacturers in China use a variety of materials to cater to different applications. The most common materials include Nitrile (NBR), Fluororubber (FKM or Viton), Silicone, Ethylene Propylene Diene Monomer (EPDM), and Hydrogenated Nitrile Butadiene Rubber (HNBR). Each material has its unique properties and is selected based on the specific requirements of the application, such as temperature resistance, chemical compatibility, and durability.

Can Chinese o-ring manufacturers provide custom sizes and designs?

Yes, many Chinese o-ring manufacturers offer custom sizes and designs to meet your specific needs. Companies like Dongguan Hongju Silicone Rubber Products, Savvy Rubber, and Tianjin SWKS Technology & Development Co., Ltd. provide OEM and ODM services, allowing you to customize the design, size, and even the color of the o-rings according to your specifications.

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 companies have relatively low MOQs, such as 10-100 pieces, while others may require larger orders, typically in the range of 500-5,000 pieces. It’s always a good idea to check with the specific manufacturer you are interested in to determine their MOQ.

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

Yes, many Chinese o-ring manufacturers adhere to international standards and certifications. Companies often comply with standards such as AS568 (USA), BS1516 (UK), DIN 3771 (Germany), JIS B 2401 (Japan), ISO 3601 (International), and GB 3452.1 (China). Additionally, they may hold certifications like ISO 9001, ISO 14001, IATF16949, and ISO 13485, ensuring the quality and reliability of their products.

Can Chinese o-ring manufacturers provide samples for testing before placing a large order?

Yes, several Chinese o-ring manufacturers offer free samples for testing before you commit to a larger order. Companies like Dongguan Hongju Silicone Rubber Products and Savvy Rubber provide this service to ensure that the o-rings meet your requirements and perform as expected in your specific application. This can be a valuable step in ensuring the quality and suitability of the o-rings.