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 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.

China O-Ring Kits Suppliers – NNK oil seal

Product Details: The Universal Type O-Ring Kit Box 30 size is a professional-quality assortment of O-rings. It includes 382 pieces of O-rings in 30 of the most popular sizes, both in inches and millimeters. The O-rings are made from commercial-grade nitrile butadiene rubber (NBR) and fluoroelastomer (FKM) materials, offering oil, chemical, and high-pressure resistance. The kit is suitable for various applications, including machines and excavators. The O-rings have a hardness range of 60-90 Shore A and can operate in temperatures from -40°C to 260°C. The kit comes in a practical resealable plastic case and is certified with ISO9001/TS16949 standards.

Pros:
– High-quality materials (NBR and FKM) providing excellent oil and chemical resist…
– Wide range of sizes (30 sizes) to fit various applications
– Suitable for high-pressure and harsh conditions
– Durable and long-lasting with UV resistance
– Practical resealable plastic case for storage
– Certified with ISO9001/TS16949 standards ensuring high quality

Cons:
– Limited to specific materials (NBR and FKM), which may not be suitable for all e…
– No mention of availability for custom sizes or special orders beyond the standar…
– May require additional backup rings for elevated operating pressure environments

O-Ring Kits – China Manufacturer & Supplier – Savvy

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 (Nitrile Rubber), FKM (Viton), EPDM, Silicone, HNBR, and more. These o-rings are available in standard sizes like AS568, ISO 3601, JIS-B2401, DIN-3771, and BS-1516, as well as non-standard sizes. The company, ORK, has two factories located in Shangrao City, Jiangxi Province, and Dongguan City, Guangdong Province. The products are certified with ISO9001, TS16949, FDA, ROHS, and REACH compliance. The temperature range for these o-rings varies from -60°C to 326°C depending on the material. The o-rings are used in various applications including

automotive, construction machinery, food, health, water treatment, and chemical processing[1][3][5].

Pros:
– Good shock-proof, heat insulation, and sound insulation performance[1].
– Excellent flexibility and anti-compressive deformation, chemical resistance[1].
– Long lifetime and high durability, with some products lasting up to 10 years[4].
– Excellent low temperature resistance and high temperature resistance[2][4].
– Easy installation and reduced risk of failure[3].
– Customizable specifications, packing requirements, and colors according to custo…
– Immediate delivery available from a large inventory of over 300 million o-rings[…
– Compliance with international standards such as ISO9001, TS16949, FDA, ROHS, and…

Cons:
– Minimum Order Quantity (MOQ) requirements, which can be 100-150 units depending…
– Payment terms require 100% payment in advance for orders under $1000 (or $2000 i…
– Express cost for samples needs to be paid by the customer if samples are not in…

O-Rings | China – Products | Parker NA

Product Details: Parker O-rings are precision-engineered seals available in a wide range of materials, including Acrylonitrile-Butadiene (NBR), Butyl (IIR), Chloroprene (CR), Ethylene Acrylic (AEM), Ethylene Propylene (EPDM), Fluorocarbon (FKM), Fluorosilicone (FVMQ), Hydrogenated Nitrile (HNBR), Perfluoroelastomer (FFKM), Polyacrylate (ACM), and Silicone (VMQ). These materials are formulated to meet stringent industry standards such as NSF, UL, MIL-SPEC, Aerospace (AMS), NASA, FDA, and USP. The O-rings are manufactured with state-of-the-art technology to ensure material consistency and dimensional control[1][3][4].

Pros:
– Seal over a wide range of pressure, temperature, and tolerance.
– Ease of service with no smearing or retightening required.
– No critical torque on tightening, reducing the risk of structural damage.
– Require very little room and are light in weight.
– Can be reused in many cases, offering an advantage over non-elastic flat seals a…
– Gradual and easily identifiable failure mode.
– Cost-effective.
– Excellent chemical and thermal resistance depending on the material chosen.
– High purity and low particle generation in certain materials like Hifluor®[2][3]…

Cons:
– Material compatibility issues with certain fluids and chemicals (e.g., fuels wit…
– Specific materials have limitations in temperature range and chemical resistance…
– Some materials like Butyl rubber have poor short-term rebound and low temperatur…

O Ring Kits – China Supplier, Wholesale

O-ring Kits

Product Details: The Yellow O-Ring Kits are available in various materials including NBR, FKM, FFKM, EPDM, and silicone. These kits can be customized in any color and have a minimum order quantity (MOQ) of 100. The delivery time is specified upon inquiry. The kits include a range of o-ring sizes and types, suitable for different applications such as industrial, automotive, and hydraulic systems.

Pros:
– Customizable colors to meet specific needs
– Variety of materials available for different applications
– Includes a range of o-ring sizes for comprehensive coverage
– Meets or exceeds OEM specifications for reliability

Cons:
– Minimum order quantity of 100 may not be suitable for small-scale users
– Delivery time is not immediately specified and requires inquiry
– Limited information available on the website without direct contact

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 for various applications, including engines, pumps, cylinders, connectors, and valves. They offer both standard and custom-made O-rings, with the ability to meet specific requirements. The O-rings are designed to have strong resistance to water, oil, and high temperatures. The manufacturing process includes design, tool making, color mixing, compression molding, quality inspection, and packaging. Hongju follows ISO 3601 standards for dimensions and tolerances and can use different materials such as liquid silicone rubber. They also provide OEM and ODM services and ensure compliance with international safety standards like CE, SGS, REACH,

and ROHS Directive requirements.

Pros:
– High-quality silicone rubber O-rings with strong resistance to water, oil, and h…
– Custom-made O-rings available to meet specific needs
– Compliance with international safety standards like CE, SGS, REACH, and ROHS Dir…
– ISO 9001: 2008 quality management system certification
– Wide range of applications including engines, pumps, cylinders, connectors, and…
– Advanced equipment and strict quality control
– Low minimum order quantity (MOQ) and rapid prototyping available

Cons:
– Importing from China may involve longer shipping times
– Factory inspection may be limited due to epidemic restrictions, though online in…

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

Product Details: Savvy manufactures a wide range of o-rings made from various materials including NBR, FKM (Viton), Silicone, EPDM, HNBR, CR, and Aflas. These o-rings are available in different sizes and shapes, including standard o-rings, encapsulated o-rings, backup-rings, and x-rings. 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 60-70 being the most common. Savvy also offers custom o-ring production with low mold/tooling costs and fast delivery.

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 i…
– Silicone o-rings are FDA-approved, tasteless, non-toxic, and resistant to high t…
– Easy to install and suitable for various industries including medical, food, and…
– Available in various colors for easy identification and customization.

Cons:
– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p…
– High hardness o-rings can be inconvenient to install.
– Material selection must be careful to match the working conditions to achieve th…

Wholesale O-Rings & O-Ring Boxes Manufacturer and …

Product Details: O-rings are mechanical gaskets with a circular cross-section, primarily manufactured from elastomer materials. They are used for both static and dynamic sealing applications to prevent the leakage of fluids, gases, and dust. O-rings are installed in a machined or molded groove on a part’s surface and achieve their sealing effect through compression and cross-sectional deformation. They are available in various materials such as Buna-Nitrile, Polyurethane, Silicone, Neoprene, Viton®, FFKM, and more, each with different temperature and media resistance properties. Standard and custom sizes, including metric, DIN, and AS568 Standard sizes, are available.

Pros:
– High-sealing capabilities and durability in low- or high-stress environments.
– Adaptable to both dynamic and static applications.
– Available in a wide range of materials to suit specific conditions.
– Good lifetime and very good price-performance ratio.
– Universally applicable across various industries.
– Encapsulated O-rings offer high chemical resistance and elasticity.

Cons:
– Chemical attack and swelling are primary causes of O-ring failure.
– May not be suitable for safety-critical applications without premium materials.
– Special care is needed for installation and maintenance to ensure optimal perfor…

O Ring Pick Set China, Wholesale, Manufacturers

Product Details: An O-Ring Pick Set is a tool kit designed for the removal of O-rings and seals. It typically includes multiple pieces of hardened metal hooks with sturdy handles. For example, the O-PICK-SET-A includes 8 different hard metal hooks with plastic handles, while the Mayhew set features 4 pieces with hardened chrome vanadium shafts. These sets are often compact, with features like twist lid cases for easy carrying and storage.

Pros:
– Economical and reduces the chance of surface damage during O-ring removal.
– Includes multiple hooks of different sizes to accommodate various O-ring types.
– Hardened metal shafts provide durability and long-lasting performance.
– Sturdy handles ensure comfortable grip and control.
– Compact and portable design with storage cases.

Cons:
– May not be suitable for all types of O-rings or seals due to limited hook sizes.
– Handles may be made of less durable materials, such as plastic, which could brea…
– Some sets may have fewer pieces, limiting versatility.

Comparison Table

Company	Product Details	Pros	Cons	Website
China O-Ring Kits Suppliers – NNK oil seal	The Universal Type O-Ring Kit Box 30 size is a professional-quality assortment of O-rings. It includes 382 pieces of O-rings in 30 of the most popular…	– High-quality materials (NBR and FKM) providing excellent oil and chemical resist… – Wide range of sizes (30 sizes) to fit various applications – S…	– Limited to specific materials (NBR and FKM), which may not be suitable for all e… – No mention of availability for custom sizes or special orders…	www.nokcn-seals.com
O-Ring Kits – China Manufacturer & Supplier – Savvy				savvyrubber.com
FKM O Rings, China NBR O Ring supplier	The products offered by www.o-ringsseals.com include a wide range of o-ring seals made from various materials such as NBR (Nitrile Rubber), FKM (Viton…	– Good shock-proof, heat insulation, and sound insulation performance[1]. – Excellent flexibility and anti-compressive deformation, chemical resistanc…	– Minimum Order Quantity (MOQ) requirements, which can be 100-150 units depending… – Payment terms require 100% payment in advance for orders under…	www.o-ringsseals.com
O-Rings	China – Products	Parker NA	Parker O-rings are precision-engineered seals available in a wide range of materials, including Acrylonitrile-Butadiene (NBR), Butyl (IIR), Chloropren…	– Seal over a wide range of pressure, temperature, and tolerance. – Ease of service with no smearing or retightening required. – No critical torque on…
O Ring Kits – China Supplier, Wholesale				www.o-ringsseals.com
O-ring Kits	The Yellow O-Ring Kits are available in various materials including NBR, FKM, FFKM, EPDM, and silicone. These kits can be customized in any color and…	– Customizable colors to meet specific needs – Variety of materials available for different applications – Includes a range of o-ring sizes for compre…	– Minimum order quantity of 100 may not be suitable for small-scale users – Delivery time is not immediately specified and requires inquiry – Limited…	www.hbmichu.com
Top 10 O-ring Manufacturers and Suppliers in China (2024)	Hongju produces high-quality silicone rubber O-rings and high-temperature O-ring seals for various applications, including engines, pumps, cylinders,…	– High-quality silicone rubber O-rings with strong resistance to water, oil, and h… – Custom-made O-rings available to meet specific needs – Complia…	– Importing from China may involve longer shipping times – Factory inspection may be limited due to epidemic restrictions, though online in…	hongjusilicone.com
O-Rings, Rubber Seals – Best China Manufacturer & …	Savvy manufactures a wide range of o-rings made from various materials including NBR, FKM (Viton), Silicone, EPDM, HNBR, CR, and Aflas. These o-rings…	– 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…	– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p… – High hardness o-rings can be inconvenient to install. – Materi…	savvyrubber.com
Wholesale O-Rings & O-Ring Boxes Manufacturer and …	O-rings are mechanical gaskets with a circular cross-section, primarily manufactured from elastomer materials. They are used for both static and dynam…	– High-sealing capabilities and durability in low- or high-stress environments. – Adaptable to both dynamic and static applications. – Available in a…	– Chemical attack and swelling are primary causes of O-ring failure. – May not be suitable for safety-critical applications without premium materials….	www.china-oilseals.com
O Ring Pick Set China, Wholesale, Manufacturers	An O-Ring Pick Set is a tool kit designed for the removal of O-rings and seals. It typically includes multiple pieces of hardened metal hooks with stu…	– Economical and reduces the chance of surface damage during O-ring removal. – Includes multiple hooks of different sizes to accommodate various O-rin…	– May not be suitable for all types of O-rings or seals due to limited hook sizes. – Handles may be made of less durable materials, such as plastic, w…	www.bestsuppliers.com

Frequently Asked Questions (FAQs)

Frequently Asked Questions About O-Ring Sets 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), Fluorine rubber (FKM or Viton), Silicone, EPDM, Hydrogenated Nitrile (HNBR), Fluorosilicone (FVMQ), and others. Each material has its own unique properties and is chosen based on the specific application and required performance, such as temperature resistance, chemical compatibility, and durability.

Can I customize o-ring sizes and shapes from Chinese manufacturers?

Yes, you can customize o-ring sizes and shapes from Chinese manufacturers. Many factories, such as Savvy and Hongju, offer OEM and ODM services, allowing you to specify your own dimensions and designs. They can produce both standard and metric sizes, as well as specialized shapes like encapsulated o-rings, backup-rings, and x-rings.

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 to 5,000 pieces. It’s always a good idea to check with the specific manufacturer for their MOQ policies.

Do Chinese o-ring manufacturers provide quality certifications and testing?

Yes, many Chinese o-ring manufacturers provide quality certifications and rigorous testing. Companies like SHANGRAO RUICHEN SEALING CO., LTD. and Zhongshan Melon Rubber & Plastic Products Co., Ltd. hold certifications such as ISO 9001, ISO 14001, IATF16949, and ISO 13485. These manufacturers ensure their products meet international standards and undergo machine testing to guarantee quality and performance.

Can I get free samples from Chinese o-ring manufacturers for testing?

Yes, some Chinese o-ring manufacturers offer free samples for testing. For example, Dongguan Hongju Silicone Rubber Products Co., Ltd. provides potential customers with free samples to test the quality and performance of their o-rings. This allows you to evaluate the products before placing a larger order. It’s a good idea to inquire about sample policies when contacting a manufacturer.