Are you looking for the best small o-ring factories 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.

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, Aflas, and more. 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. O-rings are available in various colors, and custom colors can be produced with a provided RAL or Pantone color number.

Pros:
– High-temperature and FDA food grade options available
– 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
– Good wear resistance, oil resistance, and corrosion resistance

Cons:
– Low hardness o-rings can be prone to peeling, installation damage, extrusion, an…
– High hardness o-rings can be inconvenient to install
– Some materials may not be resistant to high temperatures or high pressures

China O Rings Manufacturers and Suppliers

FKM O Rings, China NBR O Ring supplier

Small O-ring Kits

Product Details: Small O-ring Kits are a type of sealing package offered by Hebei Michu Technology Co., Ltd. These kits involve various trimming methods for O-rings, including manual, mechanical, and cold trimming. Manual trimming is the original method where the operator holds the tool and trims the overflow edge step by step. Mechanical trimming improves efficiency and quality, especially for multi-cavity products. Cold trimming involves removing the vulcanized product and waste edge under freezing conditions, a technology jointly developed by Showa carbonic acid of Japan and Zhaoling precision of China.

Pros:
– Customization options: The O-ring kits can be customized with customer logos or…
– Variety of trimming methods: Offers manual, mechanical, and cold trimming to sui…
– Reliable customer support: Provides timely and reliable customer support for all…
– Accumulated experience: The company has specialized in small O-ring kits for man…

Cons:
– Limited information on specific kit contents: The webpage does not detail the ex…
– Dependence on technology: Cold trimming requires specialized technology, which m…

China O-Ring Kits Suppliers – NNK Oil Seal

Product Details: O-ring kit boxes are comprehensive sets containing various sizes of O-rings, designed for sealing purposes in industrial, mechanical, and hydraulic applications. These kits typically include a range of O-ring sizes, often organized in a hard-wearing storage box. The O-rings are made from different materials such as NBR (Nitrile), Silicone, FKM, EPDM, and HNBR, each with specific temperature and durability characteristics. The kits are available in different configurations, such as metric, inch, and AS568A sizes, and can be customized to meet specific application needs[1][2][4].

Pros:
– Provides a wide range of O-ring sizes for various applications, ensuring versati…
– Made from high-quality materials that offer superior sealing performance and dur…
– Customization options available to tailor the kit to specific requirements.
– Enhances system efficiency by preventing leaks and reducing friction.
– Suitable for many industrial applications, including static, dynamic, hydraulic,…

Cons:
– May not be suitable for safety-critical applications like automotive without pre…
– The cost can be higher compared to lower-quality alternatives, although the qual…
– Storage and organization of the O-rings can be complex if not properly managed.

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 allow users to fabricate o-rings by cutting and gluing the cord. The kits are suitable for emergency repairs but may have larger tolerances compared to mould-pressed o-rings.

Pros:
– Wide range of o-ring sizes and materials available
– Convenient o-ring splicing kits for on-the-job repairs
– No special skills required for splicing
– High-quality o-rings suitable for various applications
– Reasonable prices, especially for NBR material

Cons:
– Spliced o-rings have relatively large tolerances
– May require multiple spliced o-rings to achieve the desired size
– Recommended to use mould-pressed o-rings for best sealing performance if not for…

China China Small O-Ring Manufacturer, Factory | King Rubber

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 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, and quality inspection. The products comply with ISO 3601 standards and can be made from various materials including silicone, EPDM, fluoro rubber, Viton, and more. The company is ISO 9001: 2008 certified and ensures products meet 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…
– Customization capabilities to meet specific customer requirements.
– Strict quality control and compliance with international safety standards.
– Wide range of materials available, including silicone, EPDM, fluoro rubber, and…
– Advanced equipment and experienced staff ensure reliable quality and timely deli…
– Low minimum order quantity (MOQ) and rapid prototyping available.

Cons:
– Importing products from China may involve longer shipping times.
– Factory inspections may be limited due to epidemic restrictions, though online i…

China, O-Rings & McMaster

Product Details: The discussion revolves around O-Rings, specifically those sourced from China and sold by McMaster. The user ordered O-Rings from McMaster at a very low price ($0.044 each) and discovered they were sourced from China. The O-Rings in question are likely standard AS568 sizes, but the specific details such as material, hardness, and temperature range are not provided in this thread. The user mentions issues with quality, including a small tear on the second O-Ring inspected.

Pros:
– Very low cost, making them an attractive option for budget-conscious buyers.
– Wide availability and quick shipping from McMaster.

Cons:
– Quality concerns, such as the presence of small tears or defects, which could le…
– Sourced from China, which the user perceives as a potential quality risk compare…

Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司

Product Details: The website https://www.oring-seal.com/ offers a variety of sealing products, including O-Rings, Quad-Ring Seals, and Oil Seals. O-Rings are made from elastomeric materials such as NBR, FKM, EPDM, and silicone, and are suitable for both static and dynamic sealing applications. They are widely used in hydraulic and pneumatic systems, machinery, tools, engines, pumps, and valves. Quad-Ring Seals have a four-lipped profile, which prevents twisting in the groove and offers low friction and high sealing efficiency. Oil Seals, or shaft seals, prevent the leakage of lubricants and other fluids from machines and equipment, and are made from materials like rubber, silicone, and

polyurethane.

Pros:
– O-Rings offer simplicity of construction, standardized seal dimensions, a wide s…
– Quad-Ring Seals avoid twisting in the groove, have low friction, and provide ver…
– Oil Seals are durable, flexible, and offer excellent sealing performance, making…
– All products are available in various sizes, shapes, and materials, making them…
– The seals are resistant to high pressure, temperature, and chemical exposure, en…

Cons:
– O-Rings can suffer from compression set or residual deformation, which affects t…
– Quad-Ring Seals may require specific installation to avoid any issues with the m…
– Oil Seals can be affected by extreme operating conditions such as very high temp…
– The selection of the right material for the specific application can be complex…
– Special orders or custom designs may have longer lead times compared to standard…

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About Small O-Ring Factories in China

What materials are commonly used by small o-ring factories in China?

Small o-ring factories in China often use a variety of materials, including Nitrile Rubber (NBR), Fluorinated Rubber (FKM or Viton), Ethylene Propylene Diene Monomer (EPDM), and Silicone. Each material has its own unique properties and is chosen based on the specific application and required durability. For instance, NBR is popular for its good properties and low cost, while FKM is used for high-standard sealing equipment.

What is the typical minimum order quantity (MOQ) for small o-ring orders in China?

The minimum order quantity (MOQ) can vary significantly depending on the factory. Some factories, like Xingtai Baifu Seal Co., Ltd., may have an MOQ as low as 10 pieces, while others might require orders of 500 to 5,000 pieces. It’s always a good idea to check with the specific factory you’re interested in to see what their MOQ is.

Do small o-ring factories in China offer customization options?

Yes, many small o-ring factories in China offer customization options. You can provide your own design drawings, and the factories will help you turn your ideas into mass-produced products. For example, Dongguan Hongju Silicone Rubber Products Co., Ltd. and Savvy Rubber can manufacture O-rings in both standard and metric sizes, and they also offer OEM and ODM services for customized products.

What kind of certifications and quality standards do these factories adhere to?

Many small o-ring factories in China adhere to international quality standards such as ISO 9001, ISO 14001, IATF16949, and ISO 13485. These certifications ensure that the products meet high-quality and safety standards. For instance, SHANGRAO RUICHEN SEALING CO., LTD. and Zhongshan Melon Rubber & Plastic Products Co., Ltd. are certified under these standards.

How do I ensure the quality of the o-rings before placing a large order?

To ensure the quality of the o-rings, you can request free samples from the factory for testing. This is a common practice among reputable manufacturers like Dongguan Hongju Silicone Rubber Products Co., Ltd. and Xiamen Flying Silicone Rubber Co., Ltd. Testing these samples will give you a clear idea of the product’s quality before you commit to a larger order.