Are you looking for the best seal and O-ring manufacturers in China? With so many options available, it can be overwhelming to choose the right one. Let’s dive into a comparison of the top seal and O-ring factories in China, highlighting their strengths, specialties, and what sets them apart in the industry. From Haining Chaoyue Seals Co., Ltd. to Xiamen Xlong Seal Co., Ltd. and Savvy, we’ll explore who stands out and why.

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

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. These O-rings are widely used in various applications such as engines, pumps, cylinders, connectors, and valves. The company offers both standard and custom-made O-rings to meet specific customer needs. The manufacturing process includes design, tool making, color mixing, compression molding, quality inspection, and packaging. Hongju adheres to ISO 3601 standards for dimensions and tolerances and uses high-quality raw materials. The company also provides options for using liquid silicone rubber and offers different hardness levels with a tolerance of plus or minus 3-5A[1].

Pros:
– High-quality silicone rubber O-rings with strong resistance to water, oil, and h…
– Customization options available to meet specific customer requirements
– Strict quality control and adherence to ISO 3601 standards
– Wide range of applications including engines, pumps, cylinders, and more
– Use of advanced equipment and precision molds
– Environmentally friendly and eco-saving processes
– Certified to ISO 9001: 2008 and compliant with CE, FDA, SGS, and ROHS Directive…

Cons:
– Importing from China may involve longer shipping times
– Production cycle can vary from 9-15 workdays depending on quantity and complexit…

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 30 of the most popular sizes, with a total of 382-447 pieces depending on the type. The O-rings are made from commercial grade nitrile butadiene rubber (NBR) and fluoroelastomer (FKM), offering excellent oil and chemical resistance. The material hardness ranges from 60-90 Shore A, and the temperature tolerance is from -40 to 260°C. The kit is suitable for various applications, including machines, excavators, cars, doors, windows, and electric appliances. The O-rings are UV resistant and have a thick wall structure for maximum protection and

durability. The kit comes in a practical resealable plastic case and is certified with ISO9001/TS16949 standards[1][5].

Pros:
– High-quality materials (NBR and FKM) with excellent oil and chemical resistance
– Wide range of sizes (30 most popular sizes) suitable for various applications
– UV resistant and thick wall structure for long-term durability
– Suitable for both professional and home use
– Meets ASTM D 2000 and ISO9001/TS16949 standards
– Practical resealable plastic case for storage

Cons:
– Limited to specific material types (NBR and FKM), which may not be suitable for…
– No mention of availability for custom sizes or special orders beyond the standar…
– Requires careful selection of the right type and size to match usage conditions…

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, Aflas, and more. These o-rings are available in standard and custom sizes, with the ability to produce encapsulated o-rings, backup-rings, x-rings, etc. The temperature range for these o-rings varies by material, such as -70°C to 220°C for Silicone. The hardness is typically measured in Shore A, with common hardness levels being 60 to 90. Savvy also offers o-rings in various colors, with the option for custom colors. The company has thousands of molds and can arrange for fast delivery via door-to-door

courier.

Pros:
– Good property and low cost, especially for NBR which is used in about 50% of o-r…
– FKM (Viton) offers the best comprehensive performance and is widely used in high…
– Silicone o-rings are tasteless, non-toxic, and resistant to high temperatures an…
– Custom o-rings can be made at a very low mold/tooling cost with fast delivery.
– Wide range of materials available to suit different working conditions and appli…

Cons:
– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p…
– High hardness o-rings can be inconvenient to install.
– Unique or custom colors may increase the cost and require a larger MOQ with a lo…

Custom HNBR O-Ring Manufacturer in China

Product Details: HNBR (Hydrogenated Nitrile Butadiene Rubber) O-rings are made from a synthetic polymer obtained by saturating the double bonds in nitrile’s butadiene segments with hydrogen. This process enhances their heat, ozone, and chemical resistance. HNBR O-rings are available in various durometers (70, 80, 90) and have a temperature range from -40°C to +150°C (-40°F to +302°F). They are suitable for use with petroleum-based oils, 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.

Pros:
– Excellent resistance to oils and chemicals
– Superior heat and ozone resistance
– Good low-temperature properties depending on Acrylonitrile content
– Resistant to compression set
– Cost-effective alternative to fluorocarbon rubber in some applications
– Suitable for demanding applications such as automotive and industrial uses

Cons:
– Not suitable for use with chlorinated hydrocarbons, ketones, ethers, esters, and…
– Higher Acrylonitrile 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 offers a one-stop O rings OEM/ODM solution. They provide custom options including 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 guarantee product quality and have certificated compounds to meet specific market requirements. Their products include rubber O-rings, O-Ring kits, silicone rubber O-rings, hydraulic seals, oil seals, and other sealing products.

Pros:
– One-stop O rings OEM/ODM solution
– Custom options: design, color, packaging, logo
– Various international O-Ring standards
– Most sizes already tooling, no additional investment needed
– Suitable and well-known raw material suppliers
– Certificated compounds to meet specific markets
– Certificated laboratory for developing and identifying match compounds

Cons:
– No specific information on pricing or minimum order quantities
– No detailed information on the production process or quality control measures on…

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

Perfluoroelastomer FFKM O ring Manufacturer

Comparison Table

Frequently Asked Questions (FAQs)

What types of materials are commonly used to make O-rings in Chinese factories?

Chinese O-ring factories often use a variety of materials, but the most common ones include Nitrile Butadiene Rubber (NBR), Fluororubber (FKM or Viton), and Silicone. NBR is popular due to its good properties and low cost, FKM is known for its excellent comprehensive performance, and Silicone is favored in medical and food industries for its non-toxic and high-temperature resistance.

Can Chinese O-ring manufacturers produce custom-sized and shaped O-rings?

Yes, many Chinese O-ring manufacturers offer customization options. Companies like Savvy and SWKS Seal can produce O-rings in various sizes and shapes according to your specifications. They have extensive mold collections and can create custom O-rings at relatively low mold and tooling costs, ensuring fast delivery for your specific needs.

What are the typical applications of O-rings produced by Chinese manufacturers?

O-rings from Chinese manufacturers are widely used in various industries, including hydraulic and pneumatic systems, aerospace, automotive, medical equipment, and military applications. They are essential for sealing fluids such as air, water, and oil, and can be used in both static and dynamic sealing conditions.

How do Chinese O-ring manufacturers ensure the quality of their products?

Chinese O-ring manufacturers often adhere to strict quality control standards. Companies like Jiangyin No.3 Rubber Manufacturer Co., Ltd. and DMS Seals Technology Co., Ltd. conduct thorough quality assurance checks and tests on each product before shipping. Many of these manufacturers also hold international certifications such as ISO 9001, ISO 14001, and IATF16949 to ensure high-quality products.

What kind of additional services do Chinese O-ring manufacturers typically offer?

Besides producing O-rings, many Chinese manufacturers provide additional services to make the process smoother for their customers. These services include assembly, packing, and shipment of products, as well as on-site service support. Some companies, like Xiamen Lindas Hardware Industrial Co., Ltd., also offer prompt delivery for prototypes and customized products, making them a one-stop solution for all your sealing needs.