Are you looking for the best O-ring manufacturers in China? With so many options available, it can be overwhelming to choose the right one. 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 needs.
O-Ring Store
Custom O-ring Manufacturer and Wholesale Supplier
Product Details: Hongju Silicone offers custom and wholesale O-ring seals made from high-quality silicone and rubber materials. These O-rings are designed for various applications, including engines, pumps, cylinders, connectors, and valves. They are available in standard and custom sizes, and the company follows ISO3601 standards for dimensions and tolerances. The manufacturing process includes O-ring design, tool making, color mixing, compression molding, quality inspection, and packaging. Materials can be customized, including liquid silicone rubber, and the company provides free samples for testing.
Pros:
– High-quality raw materials and precision molds ensure strong resistance to water…
– Wide selection of stock items at wholesale prices, along with customization capa…
– Strict quality control over the production process with both manual and machine…
– Fast delivery and good customer service.
– Ability to accommodate low minimum order quantities (MOQs).
– Free samples available for testing.
Cons:
– The hardness tolerance is plus or minus 3-5A, which may not be suitable for all…
– Silicone O-rings have poor tear resistance and are not ideal for dynamic applica…
Large silicone store o rings – Kin by Rice n Roll
Stainless O Ring Manufacturer in China – HM
Product Details: The manufacturing process of stainless steel O rings at HM involves precision CNC machining. It starts with the selection of high-quality stainless steel material. The O rings are made from various grades of stainless steel, including 302, 303, 304, 304L, 316, and 316L. These O rings are designed for durability and resistance to corrosion, making them suitable for a wide range of industries such as chemical processing, food processing, and medical equipment. Custom and standard designs are available to meet specific application requirements.
Pros:
– Made from high-quality stainless steel for durability and corrosion resistance.
– Precision CNC machining ensures high accuracy and reliability.
– Available in various grades of stainless steel to suit different applications.
– Custom and standard designs to meet specific industry needs.
Cons:
– Limited information available on the website regarding specific temperature and…
– No detailed information on the cost or lead time for custom orders.
China Best O-rings Suppliers and Manufacturers
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 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 can be customized to meet specific needs. Savvy offers fast delivery and competitive pricing due to their extensive mold
inventory and favorable courier discounts.
Pros:
– High-temperature resistance, with some materials like Silicone operating up to 2…
– Good chemical resistance, with different materials suitable for various chemical…
– Wide range of materials available, including FDA-grade Silicone for medical and…
– Low mold/tooling cost for custom o-rings.
– Fast delivery options through door-to-door courier services.
– High precision and smooth appearance, especially for rubber compounds like NBR a…
Cons:
– Low hardness o-rings can be prone to peeling, installation damage, extrusion, an…
– High hardness o-rings can be inconvenient to install.
– Some materials may not be suitable for high-pressure applications, with sealing…
Top 10 Viton O-ring Manufacturers and Suppliers in China …
Product Details: Viton® O-Rings are made from fluorocarbon materials, specifically fluoroelastomers (FKM), known for their excellent chemical and temperature resistance. They are available in various types such as A, B, F, GLT, and GFLT, each with different fluorine content and properties. Standard temperature range is -20°F to 400°F (-29°C to 204°C), and standard hardness is 70-75 Shore A. They are widely used in chemical, automotive, aerospace, and industrial applications.
Pros:
– Excellent resistance to acids, fuels, mineral and vegetable oils, and greases.
– High heat resistance with situational service life above 200°C.
– Excellent resistance to aging and ozone.
– Low gas permeability and low compression set.
– Available in various formulations to meet specific application needs, including…
– High chemical resistance and durability in harsh environments.
Cons:
– Not recommended for use with steam, amines, or polar solvents.
– Limited low-temperature flexibility in some types, though improved in GLT and GF…
– Fair to good cold resistance and water steam resistance.
– Fair electrical properties.
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 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[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…
O-Ring Kits – China Manufacturer & Supplier – Savvy
Product Details: Savvy supplies o-ring kits in various configurations. The kits include o-rings made from materials such as NBR, FKM, and PTFE. Each kit contains 382 or 386 o-rings in 30 different sizes. There are two types of o-ring splicing kits available: one in metric size (9 cords) and the other in imperial size (5 cords), with hardness options of Shore A 70 or Shore A 75. The splicing kits include o-ring cord, a splicing jig, a cutting tool, and adhesives, allowing users to fabricate o-rings as needed. These kits are convenient for on-the-job repairs and can be used for temporary emergency
solutions[1].
Pros:
– Wide range of o-ring sizes and materials available
– Convenient for on-the-job repairs with splicing kits
– Includes necessary tools and adhesives for o-ring fabrication
– Suitable for both metric and imperial measurements
– High-quality materials such as NBR, FKM, and PTFE
Cons:
– Spliced o-rings have relatively large tolerances
– May require multiple splices to achieve the desired size
– Not recommended for non-emergency use due to potential for lower sealing perform…
– Higher hardness o-rings can be inconvenient to install
The O-Ring Store LLC
Product Details: The OSK™ Industrial Boss Seal Kit is a comprehensive sealing solution featuring 212 pieces of O-Rings designed for Boss SAE straight thread tube fittings. It is available in Buna-N 90 and Fluorocarbon Viton®/FKM 90 Duro materials. The kit is essential for maximizing sealing solutions in hydraulic systems.
Pros:
– Comprehensive kit with 212 pieces covering various sizes
– Available in different materials (Buna-N and Viton®/FKM) to suit various applica…
– Designed for Boss SAE straight thread tube fittings, ensuring compatibility
– Backed by ISO 9001:2015 Quality Management System certification for reliability…
– Free delivery over $200
Cons:
– Higher cost for the Viton®/FKM 90 Duro version ($112.000)
– May require additional tools or expertise for proper installation
– Limited to specific applications (hydraulic systems with Boss SAE fittings)
Comparison Table
| Company | Product Details | Pros | Cons | Website |
|---|---|---|---|---|
| O-Ring Store | www.theoringstore.com | |||
| Custom O-ring Manufacturer and Wholesale Supplier | Hongju Silicone offers custom and wholesale O-ring seals made from high-quality silicone and rubber materials. These O-rings are designed for various… | – High-quality raw materials and precision molds ensure strong resistance to water… – Wide selection of stock items at wholesale prices, along with… | – The hardness tolerance is plus or minus 3-5A, which may not be suitable for all… – Silicone O-rings have poor tear resistance and are not ideal fo… | hongjusilicone.com |
| Large silicone store o rings – Kin by Rice n Roll | kinbyricenroll.com | |||
| Stainless O Ring Manufacturer in China – HM | The manufacturing process of stainless steel O rings at HM involves precision CNC machining. It starts with the selection of high-quality stainless st… | – Made from high-quality stainless steel for durability and corrosion resistance. – Precision CNC machining ensures high accuracy and reliability. – A… | – Limited information available on the website regarding specific temperature and… – No detailed information on the cost or lead time for custom ord… | hmaking.com |
| China Best O-rings Suppliers and Manufacturers | www.sealsmanufacturer.com | |||
| O-Rings, Rubber Seals – Best China Manufacturer & … | 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 b… | – High-temperature resistance, with some materials like Silicone operating up to 2… – Good chemical resistance, with different materials suitable fo… | – Low hardness o-rings can be prone to peeling, installation damage, extrusion, an… – High hardness o-rings can be inconvenient to install. – Some m… | savvyrubber.com |
| Top 10 Viton O-ring Manufacturers and Suppliers in China … | Viton® O-Rings are made from fluorocarbon materials, specifically fluoroelastomers (FKM), known for their excellent chemical and temperature resistanc… | – Excellent resistance to acids, fuels, mineral and vegetable oils, and greases. – High heat resistance with situational service life above 200°C. – E… | – Not recommended for use with steam, amines, or polar solvents. – Limited low-temperature flexibility in some types, though improved in GLT and GF…… | hongjusilicone.com |
| China O-Ring Kits Suppliers – NNK Oil Seal | O-ring kit boxes are comprehensive sets containing various sizes of O-rings, typically made from materials such as NBR (Nitrile), Silicone, FKM, EPDM,… | – Provides a wide range of O-ring sizes for various applications – Made from high-quality materials ensuring superior sealing performance – Customizat… | – May not be suitable for safety-critical applications like automotive without pre… – Higher quality kits can be more expensive compared to lower qu… | www.nokcn-seals.com |
| O-Ring Kits – China Manufacturer & Supplier – Savvy | Savvy supplies o-ring kits in various configurations. The kits include o-rings made from materials such as NBR, FKM, and PTFE. Each kit contains 382 o… | – Wide range of o-ring sizes and materials available – Convenient for on-the-job repairs with splicing kits – Includes necessary tools and adhesives f… | – Spliced o-rings have relatively large tolerances – May require multiple splices to achieve the desired size – Not recommended for non-emergency use… | savvyrubber.com |
| The O-Ring Store LLC | The OSK™ Industrial Boss Seal Kit is a comprehensive sealing solution featuring 212 pieces of O-Rings designed for Boss SAE straight thread tube fitti… | – Comprehensive kit with 212 pieces covering various sizes – Available in different materials (Buna-N and Viton®/FKM) to suit various applica… – Des… | – Higher cost for the Viton®/FKM 90 Duro version ($112.000) – May require additional tools or expertise for proper installation – Limited to specific… | www.theoringstore.com |
Frequently Asked Questions (FAQs)
What types of materials are commonly used to make O-rings in Chinese factories?
Chinese O-ring manufacturers 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 chosen based on the specific application and required performance, such as resistance to chemicals, high temperatures, or extreme cold.
Can I customize the size and design of O-rings from Chinese manufacturers?
Yes, you can customize the size and design of O-rings from Chinese manufacturers. Many companies, such as Dongguan Hongju Silicone Rubber Products Co., Ltd. and Savvy Rubber, offer OEM and ODM services that allow you to specify the exact dimensions, materials, and even colors of your O-rings according to your needs. They also provide services for custom molds and tooling at relatively low costs.
What are the typical minimum order quantities (MOQs) for O-rings from Chinese suppliers?
The minimum order quantities (MOQs) for O-rings from Chinese suppliers can vary widely. Some manufacturers have low MOQs, such as 10-100 pieces, while others may require larger orders, typically ranging from 500 to 10,000 pieces. It depends on the specific supplier and the type of O-ring you are ordering.
Do Chinese O-ring manufacturers provide quality certifications and testing?
Yes, many Chinese O-ring manufacturers provide quality certifications and conduct rigorous testing. Companies like Jiangyin No.3 Rubber Manufacturer Co., Ltd. and SWKS Seal ensure high-level quality control with ISO 9001, ISO 13485, and other international certifications. They also perform thorough quality checks and tests on each product before shipping to ensure they meet the required standards.
Can I get free samples from Chinese O-ring manufacturers for testing?
Yes, you can get free samples from some Chinese O-ring manufacturers for testing. For example, Dongguan Hongju Silicone Rubber Products Co., Ltd. offers free samples to potential customers so they can test the quality and performance of the O-rings before placing a larger order. This helps ensure that the products meet your specific requirements.