Are you looking for the best o-ring and seal factories in China? With so many options available, it can be overwhelming to choose the right one. 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.

Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司

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 (Nitrile Rubber), FKM (Viton), EPDM, HNBR, ACM, NR, and more. These o-rings are available in different hardness levels (20 Shore A to 90 Shore A), colors, and sizes, including standard AS568, ISO 3601, and custom sizes. The products are certified with ISO9001, TS16949, FDA, RoHS, and REACH compliance. They are used in various applications including automotive, construction machinery, machine tool equipment, food, health, water treatment, and chemical processing. The company, ORK, has two factories located in Shangrao City, Jiangxi Province, and

Dongguan City, Guangdong Province, China[1][3][5].

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 good chemical resi…
– Long lifetime of components, with some from well-known manufacturers.
– Excellent low temperature resistance and high temperature resistance up to 326℃…
– Good sealing solution, long service life, and easy installation.
– Immediate delivery available from a large inventory of over 300 million o-rings…

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…
– While the products have good chemical resistance, specific resistance to certain…

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

China O Rings Manufacturers and Suppliers

Perfluoroelastomer FFKM O ring Manufacturer

Product Details: FFKM O-rings are made of perfluoroelastomer compounds with a higher fluorine content than FKM fluoroelastomers. They are known for their excellent resistance to chemical corrosion, organic and inorganic acids, alkali, ester, ether, ketone, aldehyde, superheated water, and steam. The maximum operating temperature is 230 °C (446 °F), and they can be manufactured into various forms such as O-rings, diaphragms, gaskets, rubber strips, and rubber plates. Key mechanical properties include a hardness of Shore A 78, 100% modulus of 9.4 MPa, tensile strength of 15.9 MPa, elongation at break of 130%, and a compression set of 20.7% after 70 hours at

204 °C[1].

Pros:
– Highest temperature resistance among all rubber O-ring and gasket materials, up…
– Excellent chemical resistance to a wide range of aggressive chemicals, including…
– High thermal, oxidative, and chemical stability due to carbon-fluorine bonds[1][…
– Long service life and reliability in dynamic and static applications[3] – Low off-gassing and extractable levels, making them suitable for clean and sensi…

Cons:
– Poor low temperature performance[3] – Significantly more costly than standard FKM materials[3] – Lower tensile strength compared to some other elastomers[4]

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

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 for custom colors. The company has thousands of molds and can arrange for fast delivery via door-to-door

courier.

Pros:
– Good property and low cost, especially for NBR which is used in about 50% of o-r…
– 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 and materials to suit different applications.

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…

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

Viton O Ring Suppliers, Manufacturers, Factory

Custom O-Rings, Custom Molded O-Ring China …

Product Details: Savvy Rubber offers custom o-rings designed and produced to meet specific requirements. These o-rings can be customized in terms of cross-section and outline shape. For standard cross-sections outside the usual ranges (e.g., AS568, ISO 3601), custom o-rings are necessary. Non-round shapes such as square, rectangular, or irregular shapes also qualify as custom o-rings. To produce these, the inner diameter (ID) and cross-section (CS) are needed for round shapes, while a detailed drawing is required for non-round shapes. Savvy can design the drawing if the customer cannot provide one. The materials used include various rubber compounds like NBR, FKM, and Silicone,

each with different properties and applications. The hardness ranges from Shore A 40 to 90, and colors can be customized using standard RAL or Pantone color numbers.

Pros:
– Strong cost control management resulting in low prices while maintaining high qu…
– Ability to produce o-rings in various cross-sections and shapes to meet specific…
– Wide range of materials available, including NBR, FKM, and Silicone, each suitab…
– Customization options for hardness and color.
– Experience in the OEM o-ring industry with thousands of molds available.

Cons:
– Higher price compared to standard o-rings due to the custom nature.
– Requires detailed communication and cooperation for non-standard shapes, which c…
– Unique colors may increase cost and require a larger minimum order quantity (MOQ…

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About O Ring and Seal Factories in China

What types of o-rings and seals do Chinese factories typically produce?

Chinese factories produce a wide variety of o-rings and seals, including standard and custom o-rings, encapsulated o-rings, backup-rings, x-rings, and other specialized seals like hydraulic seals, oil seals, and piston seals. These products are made from various materials such as NBR, EPDM, FKM, silicone, and more, catering to different industrial needs.

What are the common applications of o-rings and seals produced in China?

O-rings and seals from Chinese factories are used in a broad range of industries, including machinery, automobiles, mining, engineering construction, food processing, and even game equipment. They are essential for sealing fluids and gases in both static and dynamic conditions, ensuring the efficient operation of various mechanical systems.

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

The hardness of an o-ring, measured in Shore A, is crucial for its performance. Generally, o-rings range from 40 to 90 Shore A. For most applications, a hardness of 60-70 Shore A is suitable, as it balances ease of installation with durability. Higher hardness (80-90 Shore A) is used for high-pressure applications, while lower hardness (60 Shore A) is better for low-pressure and easier installation.

What certifications should I look for in a Chinese o-ring and seal factory?

When selecting a Chinese o-ring and seal factory, look for certifications like ISO 9001, ISO 14001, and IATF 16949. These certifications ensure that the factory adheres to international standards for quality management, environmental management, and automotive industry quality, respectively. This guarantees that the products meet high standards of quality and reliability.

How do I ensure timely delivery and competitive pricing from Chinese o-ring and seal factories?

To ensure timely delivery and competitive pricing, choose factories that have a strong logistics network and favorable courier discounts. Many Chinese factories, especially those with large inventories and thousands of molds, can arrange door-to-door courier services at low costs. Additionally, checking the minimum order quantity (MOQ) and comparing prices among different suppliers can help you find the best deal.