Are you looking for the best o-ring factories in China to meet your sealing needs? With numerous options available, choosing the right manufacturer can be daunting. In this article, we’ll compare some of the top o-ring factories in China, highlighting their strengths, materials, and what sets them apart. Let’s dive in and find the perfect fit for your requirements.

China O Rings Manufacturers and Suppliers

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 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
– Suitable for high-pressure and harsh environments
– Durable and long-lasting with UV resistance
– Practical resealable plastic case for storage
– Meets ASTM D 2000 and ISO9001/TS16949 standards

Cons:
– Limited to specific materials (NBR and FKM), which may not be suitable for all a…
– No mention of availability for custom sizes or special orders beyond the standar…
– May require additional backup rings for elevated operating pressure environments

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

FKM O Rings, China NBR O Ring supplier

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.
– Wide range of materials available to suit different working conditions and appli…

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…

Viton O Ring Suppliers, Manufacturers, Factory

O Rings Manufacturer | O Rings Supplier – Hongjie Rubber Seal

Product Details: Hongjie is a professional O-rings manufacturer in China, offering custom O-rings wholesale services since 2000. They provide a one-stop O-rings OEM/ODM solution with options for custom design, color, packaging, and logo. The company adheres to various international O-Ring standards, and most sizes are already tooling, eliminating the need for additional investment. They use well-known raw material suppliers to guarantee product quality and have certified compounds to meet specific market requirements. Hongjie also has a certified laboratory to develop and identify match compounds per customer specifications or ASTM D200 callouts.

Pros:
– One-stop O-rings OEM/ODM solution
– Custom options for design, color, packaging, and logo
– Adherence to various international O-Ring standards
– Most sizes already tooling, reducing additional investment
– Use of well-known raw material suppliers for quality assurance
– Certified compounds to meet specific market requirements
– Certified laboratory for compound development and identification

Cons:
– No specific information on pricing or cost competitiveness provided
– No details on the minimum order quantity (MOQ) or lead times

China Silicone O Ring

Product Details: Silicone O-rings are synthetic elastomers based on silicon, with pendant organic groups such as methyl, phenyl, and vinyl attached to silicon atoms. They are available in various types, including VMQ, PVMQ, and FVMQ, and can be formulated to meet specific requirements such as FDA, USP Class VI, and other industry standards. They come in a wide range of temperatures (-75°F to 450°F or -60°C to 232°C), hardness levels (30 to 80 durometer Shore A), and colors.

Pros:
– Excellent heat, ozone, and corona resistance
– Good dielectric stability and resistance to many oils, chemicals, and solvents
– Retention of flexibility and low compression set characteristics over a wide tem…
– Superior insulating properties and resistance to UV light, water, oxygen, and mo…
– Non-toxic biocompatibility, making them suitable for medical and food applicatio…
– Can be formulated to meet specific requirements such as color, temperature range…

Cons:
– Low tensile strength and low wear and tear resistance
– Not suitable for concentrated acids and alkalis, steam over 120°C (248°F), petro…
– May require higher cost for platinum-cured versions which offer better flexible…

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 fabricated 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 up to 620 °F (320 °C)[1][3] – 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][4] – 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]

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About Gasket O-Ring Factories in China

What types of materials are commonly used to manufacture o-rings in Chinese factories?

Chinese o-ring factories typically use a variety of materials, including Nitrile (NBR), Fluorinated Rubber (FKM or Viton), Silicone, Ethylene Propylene Diene Monomer (EPDM), and Hydrogenated Nitrile Butadiene Rubber (HNBR). Each material has its own unique properties and is chosen based on the specific application and required durability.

Can Chinese o-ring factories produce custom-sized and custom-material o-rings?

Yes, many Chinese o-ring factories offer customized services. They can produce o-rings in various sizes, shapes, and materials according to your specifications. Whether you need a specific design, color, or material, these factories can often meet your requirements with low mold/tooling costs and fast delivery times.

What are the common applications of o-rings and gaskets produced by Chinese factories?

O-rings and gaskets from Chinese factories are used in a wide range of industries, including machinery, automobiles, mining, engineering construction, food processing, and medical equipment. They are essential for sealing applications in hydraulic systems, pneumatic systems, and various mechanical devices to ensure leak-free performance.

Do Chinese o-ring factories adhere to international quality standards?

Yes, many Chinese o-ring factories adhere to international quality standards. They often hold certifications such as ISO 9001 and ISO 9000, ensuring that their products meet high-quality and reliability standards. Additionally, some factories conduct rigorous quality control checks and tests before shipping their products.

How long does it typically take to receive o-rings from Chinese factories?

The lead time for receiving o-rings from Chinese factories can vary depending on the season and the complexity of the order. Generally, peak season lead times can be within 15 workdays, while off-season lead times may take up to a month. Some factories also offer expedited shipping options to meet urgent needs.