Are you looking for the best o-ring manufacturers in China to meet your sealing needs? With so many options available, it can be overwhelming to choose the right one. In this article, we’ll compare some of the top o-ring factories in China, highlighting their strengths, product offerings, and what sets them apart. Let’s dive in and find the perfect fit for your business.

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 for various applications, including engines, pumps, cylinders, connectors, and valves. They offer both standard and custom-made O-rings, with the ability to meet specific requirements. The O-rings are designed to have strong resistance to water, oil, and high temperatures. The manufacturing process includes design, tool making, color mixing, compression molding, quality inspection, and packaging. Hongju follows ISO 3601 standards for dimensions and tolerances and can use different materials such as liquid silicone rubber. They also provide OEM and ODM services and ensure compliance with 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…
– Custom-made O-rings available to meet specific customer needs.
– Strict quality control and compliance with international safety standards.
– Wide range of applications including engines, pumps, cylinders, connectors, and…
– Advanced equipment and ISO 9001: 2008 quality management systems.
– Low minimum order quantity (MOQ) and rapid prototyping capabilities.

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

FKM O Rings, China NBR O Ring supplier

Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司

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, excavators, cars, doors, windows, electric appliances, bearings, and pumps. The O-rings have a hardness of 60-90 Shore A and can operate in temperatures ranging 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

China O Rings Manufacturers and Suppliers

O-Rings, Rubber Seals – Best China Manufacturer & …

Product Details: Savvy Rubber offers a wide range of o-rings made from various materials, including NBR, FKM (Viton), and Silicone. These o-rings are available in standard and custom sizes, with the ability to produce imperial and metric o-rings. The company has thousands of molds to meet different size and shape requirements. O-rings can be manufactured using different processes such as compression molding, injection molding, and spliced vulcanized methods. 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 custom colors can be produced

with the provision of standard RAL or Pantone color numbers.

Pros:
– High-quality materials with good sealing performance
– Wide range of materials available, including FDA-grade silicone
– Temperature range from -70°C to 220°C
– Custom sizes and shapes available at low mold/tooling costs
– Fast delivery options through door-to-door courier
– Low express costs due to favorable discounts
– Variety of manufacturing processes to suit different needs

Cons:
– Low hardness o-rings can be prone to peeling, installation damage, and extrusion
– High hardness o-rings can be inconvenient to install
– Custom colors may increase cost and require a larger MOQ with longer delivery ti…
– Specialized trimming methods may have lower accuracy and rougher surfaces

Viton O Ring Suppliers, Manufacturers, Factory

China Rtj Gasket,Ring Joint Gasket,Api Gasket,Octagonal …

Wholesale O-Rings & O-Ring Boxes Manufacturer and …

Product Details: O-rings are mechanical gaskets with a circular cross-section, primarily manufactured from elastomer materials. They are used for both static and dynamic sealing applications to prevent the leakage of fluids, gases, and dust. O-rings are installed in a machined or molded groove on a part’s surface and achieve their sealing effect through compression and cross-sectional deformation. They are available in various materials such as Buna-Nitrile, Polyurethane, Silicone, Neoprene, Viton®, FFKM, and more, each with different temperature and media resistance properties.

Pros:
– Versatile and adaptable to various industrial applications
– Available in a wide range of materials to suit specific conditions
– Provide tight, long-lasting, and leak-proof seals
– Can be customized for specific needs
– Good lifetime and price-performance ratio
– FDA-compliant and suitable for food and pharmaceutical applications

Cons:
– Chemical attack and swelling can cause O-ring failure
– May require special handling and installation to avoid damage
– Not suitable for all safety-critical applications without premium quality assura…

Professional Ring Joint Gaskets Manufacturer from China

Product Details: Ring joint gaskets are forged rings that fit into the machined grooves of RTJ flanges. They are available in three main types: R, RX, and BX. Type R gaskets come in oval and octagonal cross-sections, suitable for pressures up to 5,000 psi. Type RX gaskets are wider and used for higher pressure applications, also up to 5,000 psi. Type BX gaskets are designed for very high pressures up to 20,000 psi and feature a pressure relief hole. These gaskets are manufactured according to API 6A, ASME B16.20, and other relevant standards. The material of the gasket must be softer than

the flanges to prevent damage.

Pros:
– High sealing efficiency, especially with octagonal cross-sections.
– Suitable for high pressure and high-temperature applications.
– Excellent tightness and tolerance to temperature and pressure changes.
– Type RX and BX gaskets provide enhanced sealing performance and pressure equaliz…
– Available in various materials such as soft iron, low carbon steel, and stainles…

Cons:
– Requires precise flange and groove preparation to avoid damage.
– Type BX gaskets are not interchangeable with R or RX gaskets due to different gr…
– Installation requires careful attention to uniform load distribution on the gask…
– Higher cost compared to other types of gaskets due to specialized manufacturing…

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About O-Ring Gasket Factories in China

What types of o-rings and rubber products do Chinese factories typically manufacture?

Chinese o-ring factories produce a wide range of products, including standard and custom o-rings, gaskets, seals, suction cups, grommets, hoses, hydraulic and pneumatic seals, and encapsulated o-rings. These products are made from various materials such as NBR, EPDM, FKM, and silicone, catering to different industrial needs like aerospace, automotive, and machinery.

How do Chinese o-ring manufacturers ensure quality and reliability?

Many Chinese o-ring manufacturers adhere to international quality standards like ISO 9001, ISO 14001, and IATF16949. They have rigorous quality control processes in place, including thorough testing and inspection of each product before shipping. Experienced staff and advanced testing equipment ensure that the products meet high standards of quality and reliability.

Can I customize o-rings according to my specific needs?

Yes, you can customize o-rings to fit your specific requirements. Chinese manufacturers like Savvy and Hongjie offer custom molding services where they can produce o-rings in different sizes, shapes, and materials based on your designs and drawings. This flexibility allows you to get the exact product you need without high mold or tooling costs.

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

The lead time for ordering o-rings from Chinese factories can vary depending on the season and the specific factory. Generally, peak season lead times can be within 15 workdays, while off-season lead times might be around one month. Some factories also offer expedited delivery options through door-to-door courier services.

Do Chinese o-ring manufacturers provide additional services like assembly and shipping?

Yes, many Chinese o-ring manufacturers offer a range of additional services to make your experience smoother. These services include assembly, packing, and shipment of the products. Some factories, like Xiamen Lindas Hardware Industrial Co., Ltd., provide one-stop solutions that include production, assembly, and delivery, making them a convenient choice for your needs.