Are you looking for the best o-ring manufacturers in China to meet your precise sealing needs? With numerous 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, materials, and application expertise to help you make an informed decision. Let’s dive in and find the perfect fit for your project.

China O-Ring Kits Suppliers – NNK Oil Seal

Product Details: O-ring box kits are comprehensive sets containing various sizes of O-rings, designed for sealing applications in industrial, mechanical, and hydraulic systems. These kits typically include a range of O-ring sizes made from different materials such as NBR (Nitrile), Silicone, FKM, EPDM, and HNBR. Each kit is organized in a hard-wearing storage box, with the O-rings separated and organized by size. The kits are available in different configurations, such as metric, inch, and Japanese sizes, and are used in static, dynamic, hydraulic, and pneumatic components to prevent leaks of liquids and gases[1][2][4].

Pros:
– Provides a wide range of O-ring sizes in one kit, making it versatile for variou…
– Made from high-quality materials to ensure superior sealing performance and dura…
– Customization options available to tailor the kit to specific requirements.
– Enhances system efficiency by preventing leaks and reducing friction.
– Suitable for many industrial applications due to compliance with common industri…

Cons:
– May not be suitable for safety-critical applications like automotive without pre…
– The price can be higher compared to lower-quality alternatives, though it offers…
– Lead times for customization and delivery can vary, potentially affecting urgent…

VITON Quad Ring From China

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, x-rings, and custom o-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 the o-rings is measured in Shore A, typically ranging from 40 to 90, with 60-70 being the most common. O-rings are available in various colors and can be customized to meet specific needs. Savvy has a large inventory and can arrange for fast

delivery via door-to-door courier.

Pros:
– High-temperature and FDA food grade options available
– Good chemical resistance depending on the material chosen
– Wide range of materials to suit different working conditions
– Low mold/tooling cost for custom o-rings
– Fast delivery options
– High precision and smooth appearance
– Variety of colors and sizes available

Cons:
– Low hardness o-rings can be prone to peeling, installation damage, extrusion, an…
– High hardness o-rings can be inconvenient to install
– Material selection is critical to avoid compatibility issues with various chemic…

Rubber O-Rings Manufacturer in China – Lindas

Product Details: Lindas manufactures a series of O-rings in different rubber materials, including NBR, EPDM, NR, SBR, and Silicone (VMQ). These O-rings are designed to meet various industry standards and can be customized to fit specific application requirements. The production process adheres to strict quality control from raw materials to delivery, ensuring the O-rings meet or exceed customer expectations. Lindas also offers excellent technical support, fast delivery, and professional after-sales services.

Pros:
– Available in various rubber materials such as NBR, EPDM, NR, SBR, and Silicone (…
– Customizable to meet exact application requirements
– Strict quality control from raw materials to delivery
– Excellent technical support, fast delivery, and professional after-sales service…
– Meets ISO9001 and other industry standards

Cons:
– Limited information on specific temperature and chemical resistance for each mat…
– May require additional testing under actual service conditions to ensure compati…

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

China China Waterproof Screw And O Ring Groove Screw …

Product Details: The waterproof screw and o-ring groove screw are manufactured by Dongguan Yuhuang Electronic Technology Co., Ltd. These screws are made from top-quality materials and offer excellent resistance to water, moisture, and dust. The waterproof screw features a rubber seal that provides an airtight and watertight seal, making it ideal for outdoor use and in humid or moist environments. The o-ring groove screw incorporates an o-ring element for a secure seal and improved sealing performance. Both screws are available in various sizes and dimensions and are designed to withstand harsh weather conditions.

Pros:
– Excellent resistance to water, moisture, and dust
– Ideal for outdoor use and in humid or moist environments
– Provides an airtight and watertight seal
– Available in various sizes and dimensions
– Designed to withstand harsh weather conditions
– Enhanced sealing performance with o-ring element

O-Ring Kits – China Manufacturer & Supplier – Savvy

Product Details: Savvy supplies various o-ring kits, including metric and imperial sizes. The kits can be made from materials such as NBR, FKM, and PTFE. Each kit typically contains 382 or 386 o-rings in 30 different sizes. O-ring splicing kits are also available, which include 9 or 5 o-ring cords of different cross-sections, a splicing jig, a cutting tool, and adhesives. These kits are convenient for on-the-job repairs and allow users to fabricate custom o-rings by cutting and gluing the cord. The kits are packed in a plastic box for easy use.

Pros:
– Wide range of o-ring sizes and materials available
– Convenient for on-the-job repairs with splicing kits
– No special skills required to use the splicing kits
– High-quality o-rings with accurate sealing performance when using mould-pressed…
– Customizable kits to meet specific customer needs

Cons:
– Spliced o-rings have relatively large tolerances and may not be as precise as mo…
– Higher cost for FKM material compared to NBR
– Installation and use of spliced o-rings can be more complex if not done correctl…

Drive roller O-ring conveyor roller with groove – GCS

Product Details: The drive roller with an O-ring groove is designed for various conveyor applications. It is made from steel materials such as Q235 and Q345, with shafts made from A3 and 45# steel. The roller can have single or double row deep groove ball bearings with C3 clearance. The bearing housing is made from cold press steel fitting DIN 1623-1624 standards. The rollers are available in various diameters (φ89 to φ194) and lengths (145mm to 2800mm). Surface treatments include ordinary painting, hot galvanized painting, electric static spraying painting, and baked painting. Customization is available to suit specific requirements[1][2][3].

Pros:
– High durability due to the use of robust steel materials and advanced bearing sy…
– Versatile applications in industries such as chemical, grain transportation, min…
– Customizable to fit various conveyor belt widths and specific application needs.
– Available in different surface treatments to enhance longevity and resistance to…

Cons:
– May require periodic maintenance to ensure the longevity of the bearings and ove…
– The cost can be higher compared to non-custom or lower-grade conveyor rollers.
– Installation and alignment may require specialized skills and equipment.

Design of O-ring and its groove

Product Details: The design of an O-ring and its groove is crucial for the sealing performance and service life of the sealing device. Key aspects include determining the shape, size, accuracy, and surface roughness of the groove. The common groove shape is a rectangular groove. The cross-sectional area of the O-ring should account for at least 85% of the rectangular groove cross-sectional area. The groove width must be greater than the maximum diameter of the O-ring after compression deformation. The fillet at the bottom of the groove is designed to avoid stress concentration, with a recommended fillet radius of R=0.3~1mm for dynamic

sealing and R=d/2 for static sealing. Surface roughness of the groove wall affects sealing performance, with Ra=6.3~3.2 μm for static sealing and Ra=1.60 μm or lower for dynamic sealing[1].

Pros:
– Proper groove design ensures optimal sealing performance and extends the service…
– The use of fillets at the bottom of the groove prevents stress concentration and…
– Appropriate surface roughness of the groove wall improves the sealing performanc…
– Easy processing, reasonable size, and convenient installation and disassembly ar…

Cons:
– If the groove is too narrow, it can cause high frictional resistance and serious…
– A groove that is too wide can lead to abnormal wear and failure of the O-ring, e…
– Improper compression deformation rates can result in the O-ring experiencing bou…
– High surface roughness of the groove wall can negatively impact the sealing perf…

Custom O Ring Wholesale

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About O-Ring and Groove Factories in China

What materials are commonly used for o-rings in Chinese factories?

Chinese factories often use a variety of materials for o-rings, including NBR (nitrile), FKM (Viton), Silicone, EPDM, HNBR, and FFKM. Each material has its own unique properties and is selected based on the specific application requirements, such as chemical compatibility, temperature resistance, and durability.

How do I choose the right size for my o-ring?

To choose the right size for your o-ring, you need to specify the inside diameter (ID), outside diameter (OD), and the cross-sectional diameter (CS). The formula to calculate the OD is OD = ID + CS * 2. You can refer to standard size charts like AS568, BS1516, or DIN 3771, depending on your region.

What is the process for custom o-ring manufacturing in China?

For custom o-ring manufacturing, Chinese factories typically start by selecting the appropriate mold based on your desired diameter. The material is then extruded and molded using processes such as compression, transfer, or injection molding. After molding, the o-rings undergo finishing to remove excess material and ensure the correct shape and size.

What are the typical applications for o-rings produced in Chinese factories?

O-rings from Chinese factories are used in a wide range of applications, including automotive, aerospace, construction machinery, chemical processing, and food industries. They are suitable for both static and dynamic sealing applications, such as in engines, transmissions, and hydraulic systems, due to their excellent sealing properties and durability.

Can Chinese o-ring factories provide special coatings or treatments for o-rings?

Yes, many Chinese o-ring factories offer special coatings or treatments to enhance the performance of o-rings. These can include PTFE or PF coatings to reduce friction and assembly force, as well as chemical resistance coatings. These treatments can be applied based on your specific requirements to ensure the o-rings meet the needs of your application.