Are you looking for the best o-ring manufacturers 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.
Top 10 O-ring Manufacturers and Suppliers in China (2024)
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
Custom HNBR O-Ring Manufacturer in China
Product Details: HNBR O-rings are made from hydrogenated nitrile butadiene rubber, a synthetic polymer obtained by saturating the double bonds in nitrile’s butadiene segments with hydrogen. This process enhances the material’s heat, ozone, chemical resistance, and mechanical characteristics. HNBR O-rings are available in 70, 80, and 90 durometers and have a temperature range of -23°F to 300°F (-30°C to +150°C). They are suitable for use with petroleum-based oils and fuels, aliphatic hydrocarbons, vegetable oils, silicone oils and greases, ethylene glycol, water, and steam up to 300°F, as well as diluted acids, bases, and salt solutions. The acrylonitrile content (ACN) varies from 17%
to 49%, affecting low-temperature properties and resistance to fuels and polar lubricants[1][2][4].
Pros:
– Superior heat, ozone, and chemical resistance
– Enhanced mechanical characteristics and durability
– Wide temperature range (-23°F to 300°F)
– High resistance to wear, tear, and compression
– Excellent performance in petroleum-based oils and fuels, aliphatic hydrocarbons,…
– Good low-temperature properties depending on ACN content
– Cost-effective and resilient in demanding applications
Cons:
– Not suitable for use with chlorinated hydrocarbons, ketones, ethers, esters, and…
– Higher ACN content reduces low-temperature properties
– Sulfur-curing reduces heat resistance and causes inferior compression set
O Rings Manufacturer | O Rings Supplier – Hongjie Rubber Seal
Product Details: Hongjie Sealing Technology Co., Ltd is a professional O-rings manufacturer in China, offering a one-stop OEM/ODM solution. They provide custom options in design, color, packaging, and logo. The company adheres to various international O-Ring standards, with most sizes already tooling, eliminating the need for additional investment. They use well-known raw material suppliers to ensure product quality and have a certified laboratory to develop and identify compounds per customer specifications or ASTM D200 callouts.
Pros:
– Custom options: design, color, packaging, logo
– Various international O-Ring standards, most sizes already tooling
– Suitable and well-known raw material suppliers
– Certified compound to meet specific markets
– Certified laboratory for compound development
– Affordable factory direct prices
– Rapid rubber products prototyping and emergency production
– Engineering support, technical reference guides, and responsive service
Cons:
– No specific cons mentioned on the website
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. They have over a thousand molds to meet various size and shape requirements. The o-rings can be made from different materials such as rubber, metal, and other materials, with rubber being the most commonly used. Popular rubber compounds include NBR, FKM (Viton), and Silicone. Each material has specific properties and applications, such as NBR for its good properties and low cost, FKM for its comprehensive performance, and Silicone for its use in medical and food industries. The hardness of o-rings is measured in Shore
A, typically ranging from 40 to 90, with 70 being generally more suitable. O-rings are available in various colors, and custom colors can be produced with a provided RAL or Pantone color number.
Pros:
– High-quality and diverse range of o-ring products
– Fast delivery with door-to-door courier service
– Low mold/tooling cost for custom o-rings
– Good wear resistance, oil resistance, and corrosion resistance depending on the…
– Wide range of materials available, including NBR, FKM, and Silicone
– Customizable colors and sizes
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 o-rings generally usin…
– Custom colors may increase cost and require a larger MOQ with a longer delivery…
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 high temperature resistance (up to 230°C or 620°F) and excellent chemical resistance. These O-rings can withstand various aggressive chemicals, including acids, alkalis, esters, ethers, ketones, aldehydes, and superheated water and steam. They are used in critical applications across industries such as chemical processing, energy, semiconductors, pharmaceuticals, oil and gas recovery, and aerospace. 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][2][3].
Pros:
– High temperature resistance up to 230°C or 620°F
– Excellent chemical resistance to a wide range of aggressive chemicals
– Long service life and reliability in demanding applications
– Suitable for dynamic and static applications with high thermal, oxidative, and c…
– Low off-gassing and extractable levels
– Excellent compression set resistance and tensile strength for maintaining sealin…
Cons:
– Significantly more costly than standard FKM materials
– Poor low temperature performance
– May require specific tolerances and gland design to prevent extrusion and nibbli…
Xiamen Seals Technology Co.,Ltd: China O-Rings, X-Rings …
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, available in NBR and Silicone materials[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…
– Lead times for custom orders can be several days to weeks.
– Higher quality kits may come at a higher cost compared to lower quality alternat…
Comparison Table
| Company | Product Details | Pros | Cons | Website |
|---|---|---|---|---|
| Top 10 O-ring Manufacturers and Suppliers in China (2024) | hongjusilicone.com | |||
| Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司 | www.oring-seal.com | |||
| China O Rings Manufacturers and Suppliers | www.svks-rubberseal.com | |||
| FKM O Rings, China NBR O Ring supplier | www.o-ringsseals.com | |||
| Custom HNBR O-Ring Manufacturer in China | HNBR O-rings are made from hydrogenated nitrile butadiene rubber, a synthetic polymer obtained by saturating the double bonds in nitrile’s butadiene s… | – Superior heat, ozone, and chemical resistance – Enhanced mechanical characteristics and durability – Wide temperature range (-23°F to 300°F) – High… | – Not suitable for use with chlorinated hydrocarbons, ketones, ethers, esters, and… – Higher ACN content reduces low-temperature properties – Sulfur… | www.yosonseals.com |
| O Rings Manufacturer | O Rings Supplier – Hongjie Rubber Seal | Hongjie Sealing Technology Co., Ltd is a professional O-rings manufacturer in China, offering a one-stop OEM/ODM solution. They provide custom options… | – Custom options: design, color, packaging, logo – Various international O-Ring standards, most sizes already tooling – Suitable and well-known raw ma… | – No specific cons mentioned on the website |
| O-Rings, Rubber Seals – Best China Manufacturer & Supplier | Savvy manufactures a wide range of o-rings, including traditional standard o-rings, encapsulated o-rings, backup-rings, and x-rings. They have over a… | – High-quality and diverse range of o-ring products – Fast delivery with door-to-door courier service – Low mold/tooling cost for custom o-rings – Goo… | – Low hardness o-rings can be prone to peeling, installation damage, extrusion, an… – High hardness o-rings can be inconvenient to install – Specifi… | savvyrubber.com |
| Perfluoroelastomer FFKM O ring Manufacturer | FFKM O-rings are made of perfluoroelastomer compounds with a higher fluorine content than FKM fluoroelastomers. They are known for their high temperat… | – High temperature resistance up to 230°C or 620°F – Excellent chemical resistance to a wide range of aggressive chemicals – Long service life and rel… | – Significantly more costly than standard FKM materials – Poor low temperature performance – May require specific tolerances and gland design to preve… | www.jst-seals.com |
| Xiamen Seals Technology Co.,Ltd: China O-Rings, X-Rings … | www.sealsmanufacturer.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. – Customiz… | – May not be suitable for safety-critical applications like automotive without pre… – Lead times for custom orders can be several days to weeks. – H… | www.nokcn-seals.com |
Frequently Asked Questions (FAQs)
What types of materials do Chinese o-ring manufacturers typically use?
Chinese o-ring manufacturers use a variety of materials to cater to different needs. The most common materials include Nitrile Rubber (NBR), Fluororubber (FKM or Viton), Silicone, Ethylene Propylene Diene Monomer (EPDM), and Hydrogenated Nitrile Butadiene Rubber (HNBR). Each material has its unique properties, such as resistance to chemicals, oils, or extreme temperatures, ensuring you get the right o-ring for your specific application.
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. This means you can provide your own design drawings or specifications, and they will manufacture the o-rings according to your needs, including custom sizes, shapes, and materials.
What is the typical minimum order quantity (MOQ) for o-rings from Chinese manufacturers?
The minimum order quantity (MOQ) for o-rings from Chinese manufacturers can vary, but many companies are flexible and accommodate low MOQs. For example, Dongguan Hongju Silicone Rubber Products Co., Ltd. is known for accepting orders with low minimum order quantities, making it easier for you to test products or fulfill small orders without committing to large quantities.
Do Chinese o-ring manufacturers provide free samples for testing?
Yes, many Chinese o-ring manufacturers offer free samples for testing. Companies like Dongguan Hongju Silicone Rubber Products Co., Ltd. provide free samples to potential customers, allowing you to test the quality and performance of their o-rings before placing a larger order.
What kind of certifications and quality standards do Chinese o-ring manufacturers adhere to?
Chinese o-ring manufacturers often adhere to international quality standards and certifications. For instance, companies like Hongjie Rubber Seal and SWKS Seal ensure their products meet specific market requirements and are certified according to standards such as ASTM D200 or ISO 3601. This ensures the o-rings are of high quality and meet the necessary specifications for various industries.