Are you looking for the best hydraulic O-ring factories in China? If so, you’re in the right place. In this article, we’ll compare some of the top manufacturers, highlighting their strengths, product ranges, and what sets them apart in the industry. Let’s dive in and find the perfect fit for your needs.

China O Rings Manufacturers and Suppliers

China O-Ring Kits Suppliers – NNK Oil Seal

Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司

Top 10 O-ring Manufacturers and Suppliers in China (2024)

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, FKM, EPDM, HNBR, ACM, NR, and more. These O-rings are available in customized sizes, including metric and inch standards, and comply with various international standards like AS568, JIS-B2401, DIN-3771, BS-1516, and ISO3601. The hardness range is from 20 Shore A to 90 Shore A. The products are used in diverse applications including automotive, construction machinery, machine tool equipment, food, health, water treatment, and chemical processing. The company, Rui Chen Sealing Co., Ltd., has two factories in China and adheres to strict

quality control processes, including ISO9001, TS16949, FDA, RoHS, and REACH certifications[1][3][4].

Pros:
– All manufacturing processes conform to ISO-9001 standards, ensuring high quality…
– Excellent shock-proof, heat insulation, and sound insulation performance.
– Customizable specifications, packing requirements, and colors according to custo…
– High flexibility and anti-compressive deformation, along with excellent chemical…
– Long lifetime of components, with certifications from ISO9001, CE, SGS, and more…
– Experienced staff available to answer inquiries in fluent English, with a 24-hou…
– Wide range of materials and sizes available, including non-standard sizes, with…

Cons:
– Minimum Order Quantity (MOQ) requirements, which can be a barrier for small orde…
– Payment terms require 100% payment in advance for orders under $1000 (or $2000 i…

O Rings Manufacturer | O Rings Supplier – Hongjie Rubber Seal

Product Details: Hongjie Sealing Technology offers a one-stop OEM/ODM solution for O-rings. They provide custom options in design, color, packaging, and logo. The company adheres to various international O-Ring standards, and most sizes are already tooling, eliminating the need for additional investment. They use well-known raw material suppliers to guarantee product quality and have certified compounds to meet specific market requirements. Their laboratory develops and identifies compounds per customer specifications or ASTM D200 callouts.

Pros:
– One-stop OEM/ODM solution
– Custom options: design, color, packaging, logo
– Adherence to various international O-Ring standards
– No need for additional tooling investment
– Use of high-quality raw materials
– Certified compounds for specific markets
– State-of-the-art laboratory for compound development

Cons:
– No specific cons mentioned on the website
– No information on potential lead times or minimum order quantities

Hydraulic Fitting O-ring Manufacturer in China

Product Details: O-ring hydraulic fittings are special fittings that have O-rings on the metal face of the fitting to stop leaks or to reduce damage to the metal face after it has been crushed against each other. These fittings are widely used in various industries such as construction, chemical, and agriculture. The O-rings are made from strict material requirements, commonly including PTFE, Viton, Neoprene, EPDM Rubber, Silicone, and Nitrile Rubber. When measuring the threads of O-ring fittings, the inner and outer diameter of the threads can be measured with appropriate tools, and the O-ring’s inner diameter, outer diameter, and width of its

cross section should be measured on a platform.

Pros:
– Reduce the possibility of leaks
– Minimize damage to threads
– Can tolerate pressure and high temperatures
– Easily replaced and repaired
– Provide a more reliable connection seal
– Offer zero clearance for easy piping
– Resist over-torque and vibration

Cons:
– O-rings can melt or corrode if the temperature is too high or the media is incom…
– Improper installation can cause O-ring dislodgement, leading to improper sealing…
– High temperature beyond the limit range can cause the O-ring to melt
– Improper installation during assembly can cause thread damage and O-ring failure
– Factors such as size discrepancy, wrong material selection, and chemical erosion…

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, and Aflas. 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 Shore A 70 being commonly used. Savvy also offers custom o-ring production with low mold/tooling costs and fast delivery. The o-rings are available in various colors, with standard colors including Black

for NBR, Green for HNBR, and Brown for Viton.

Pros:
– High-temperature resistance, especially for Silicone o-rings which can handle te…
– Good chemical resistance; different materials have different compatibility with…
– Wide range of materials available, including FDA-grade Silicone for medical and…
– Low mold/tooling costs for custom o-ring production.
– Fast delivery options, including door-to-door courier service.
– High precision and smooth appearance, particularly for encapsulated and custom o…

Cons:
– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p…
– High hardness o-rings can be inconvenient to install.
– Specific materials have limitations; for example, NBR o-rings may not be suitabl…

China NBR HNBR FKM PTFE O Ring Manufacturer

Product Details: O-rings are seals with a solid rubber material or PTFE and an O-shaped cross section. They are used to prevent the leakage of liquid and gas media under static conditions and can also be used as dynamic sealing elements for axial reciprocating motion and low-speed rotating motion. The materials available include NBR, HNBR, FKM, and PTFE. The working temperature range depends on the material, typically from -32 to +204°C. O-rings are effective and economical for both fixed seal and dynamic seal applications. They are two-way sealing elements, with the initial compression providing the initial sealing ability, which increases with system

pressure[3].

Pros:
– Effective and economical for both fixed seal and dynamic seal applications
– Can be used in a variety of media including oil, water, air, and gas
– Available in different materials to suit various conditions
– Simple installation and reliable sealing performance
– Suitable for static sealing and low-speed dynamic applications

Cons:
– Limited by speed and pressure in dynamic sealing situations
– Not suitable for high-speed or high-pressure applications
– Material selection is critical for compatibility with the operating environment
– May not perform well in certain chemical environments such as chlorinated hydroc…

O-Ring Kits – China Manufacturer & Supplier – Savvy

Product Details: Savvy supplies various o-ring kits, including standard o-ring kits and o-ring splicing kits. The standard kits contain 382 or 386 o-rings in 30 different sizes, available in materials such as NBR, FKM, and PTFE. The o-ring splicing kits include 9 or 5 o-ring cords of different cross-sections, a splicing jig, a cutting tool, and adhesives, allowing users to fabricate custom o-rings. These kits are available in both metric and imperial sizes, with hardness levels of Shore A 70 or Shore A 75. The kits are designed for convenience and can be used for emergency repairs or custom applications.

Pros:
– Wide range of o-ring sizes and materials available, including NBR, FKM, and PTFE…
– Convenient for on-the-job repairs with the splicing kits.
– No special skills required to use the splicing kits.
– High-quality o-rings with accurate sealing performance when using mould-pressed…
– Cost-effective options, especially for nitrile material.

Cons:
– Spliced o-rings have relatively large tolerances and may not provide the best se…
– Splicing process can be time-consuming and may require splicing several o-rings…
– Higher cost for FKM material compared to NBR.

Comparison Table

Frequently Asked Questions (FAQs)

What types of materials are commonly used by hydraulic O-ring factories in China?

Hydraulic O-ring factories in China use a variety of materials to cater to different applications. Common materials include Nitrile (NBR), Fluorinated Rubber (FKM or Viton), Ethylene Propylene Diene Monomer (EPDM), Hydrogenated Nitrile Butadiene Rubber (HNBR), and Silicone. Each material has its own unique properties, such as resistance to chemicals, temperature, and wear, making them suitable for various industrial uses.

Can I customize the O-rings according to my specific needs?

Yes, you can customize O-rings to fit your specific requirements. Many Chinese manufacturers, such as Dongguan Hongju Silicone Rubber Products Co., Ltd. and Tianjin SWKS Technology & Development Co., Ltd., offer OEM and ODM services. This means you can specify the design, size, material, and even packaging to meet your particular needs. They often have low minimum order quantities (MOQs) and provide free samples for testing.

What is the typical lead time for ordering hydraulic O-rings from Chinese factories?

The lead time for ordering hydraulic O-rings from Chinese factories can vary but is generally quite efficient. For example, Hangzhou Thaeon Hytec Ltd. and other manufacturers often have lead times within 15 workdays, whether it’s peak or off-season. This quick turnaround is due to their well-equipped production facilities and extensive material stock.

How do Chinese hydraulic O-ring manufacturers ensure product quality?

Chinese hydraulic O-ring manufacturers emphasize quality control through various measures. Companies like Jiangyin No.3 Rubber Manufacturer Co., Ltd. and Hangzhou Thaeon Hytec Ltd. use advanced testing equipment, such as tensile testing machines, elasticity testing machines, and aging test boxes, to ensure the products meet international standards. They also conduct rigorous quality checks before shipping to guarantee the products are reliable and durable.

Do Chinese hydraulic O-ring factories provide additional services beyond manufacturing?

Yes, many Chinese hydraulic O-ring factories offer additional services to support their customers. For instance, Xiamen Lindas Hardware Industrial Co., Ltd. provides assembly, packing, and shipment services, making them a one-stop solution. Some manufacturers also offer design assistance, custom molding, and on-site service support to help you integrate the O-rings into your products seamlessly.