Are you looking for the best O-ring and seal manufacturers in China? With so many options available, choosing the right one can be overwhelming. In this article, we’ll compare some of the top factories in China, highlighting their specialties, product ranges, and what sets them apart. Let’s dive in and find the perfect fit for your needs.

Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司

FKM O Rings, China NBR O Ring supplier

China O Rings Manufacturers and Suppliers

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, and quality inspection. 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 for the O-rings[1].

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 adherence to international standards like ISO 3601
– Wide range of applications including engines, pumps, cylinders, and valves
– Use of advanced equipment and precision molds for accurate production
– Options for different materials and hardness levels

Cons:
– Importing from China may involve longer shipping times
– Quality inspection and testing may require additional time and resources
– Specific certifications or custom designs might require additional steps and com…

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
– Durable and long-lasting with thick wall construction
– UV resistant and suitable for use with liquids such as oil
– Certified with ISO9001/TS16949 standards ensuring high quality
– Practical resealable plastic case for easy storage

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-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 to customize colors based on RAL or Pantone standards.

Pros:
– Good property and low cost, especially for NBR which accounts for about 50% of o…
– 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.
– Available in various colors for easy identification.

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…

Seals and O-Rings | China – Products | Parker NA

Perfluoroelastomer FFKM O ring Manufacturer

Viton O Ring Suppliers, Manufacturers, Factory

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

Product Details: Xiamen Seals Technology Co., Ltd. offers a wide range of seal products, including O-Rings, X-Rings, and custom molded rubber components. Their product lineup includes Buna-N Standard O-Rings, Spliced and Vulcanized O-Rings, and Colored EPDM O-Rings. They also provide silicone custom rubber parts with FDA certification. The company has a complete production chain from R&D, rapid prototypes, mold design, mold making, component production, assembling, packing, to export. They can custom design parts based on customer specifications and provide products in both standard and metric sizes.

Pros:
– Wide range of seal products including O-Rings, X-Rings, and custom molded rubber…
– Complete production chain from R&D to export
– Ability to custom design parts based on customer specifications
– Products available in both standard and metric sizes
– High-quality molded rubber products with FDA certification for silicone parts
– Good service and quality products

Cons:
– Limited information on specific material properties and performance under variou…
– No detailed pricing information available on the website
– Dependence on customer-provided prints and specifications for custom designs

Comparison Table

Frequently Asked Questions (FAQs)

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

Chinese O-ring manufacturers often use a variety of materials, but the most common ones are 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 factories produce customized products?

Yes, many Chinese O-ring factories offer customization options. Companies like Xiamen Lindas Hardware Industrial Co., Ltd., Tianjin King Seal Co., Ltd., and Savvy Rubber can produce O-rings and other rubber parts according to your specific designs and drawings. They also provide services such as assembly, packing, and shipment, making them versatile and customer-friendly.

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

The lead time can vary depending on the season and the specific manufacturer. Generally, peak season lead times can be within 15 workdays, while off-season lead times might take around a month. For example, Tianjin King Seal Co., Ltd. mentions these timeframes, ensuring you can plan your orders accordingly.

Do Chinese O-ring manufacturers adhere to international quality standards?

Yes, many Chinese O-ring manufacturers adhere to international quality standards. Companies like Tianjin King Seal Co., Ltd. and SWKS Seal hold certifications such as ISO 9001, which ensures that their products meet high-quality standards. Additionally, these manufacturers often conduct rigorous testing before the final delivery of their products.

What industries commonly use O-rings and seals produced by Chinese factories?

O-rings and seals from Chinese factories are used in a wide range of industries, including machinery, automobiles, aerospace, medical equipment, mining, engineering construction, and food processing. These products are essential for ensuring the proper functioning and sealing of various mechanical components across different sectors.