Are you looking for the best o-ring materials from China but unsure where to start? With numerous top-notch manufacturers, choosing the right one can be daunting. In this article, we’ll compare some of China’s leading o-ring factories, helping you make an informed decision for your needs. Let’s dive in

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

China O Rings Manufacturers and Suppliers

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, x-rings, and custom o-rings. The o-rings can be made from various materials such as rubber, metal, and other materials, with rubber being the most commonly used. Popular rubber compounds include NBR, FKM (Viton), and Silicone. Each material has specific properties and applications: NBR is widely used due to its good properties and low cost; FKM/Viton offers comprehensive performance and is used in high-standard sealing equipment; Silicone is used in medical and food industries due to its non-toxic and high-temperature resistant properties. The hardness of o-rings is

measured in Shore A, typically ranging from 40 to 90, with 70 being generally more suitable. O-rings are available in various colors, and custom colors can be produced with a provided RAL or Pantone color number.

Pros:
– Wide range of materials and sizes available
– Fast delivery and low mold/tooling costs for custom o-rings
– Good chemical resistance and compatibility with various chemical elements
– Suitable for different working conditions and industries
– Available in various colors for easy identification
– High-quality and cost-effective

Cons:
– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p…
– High hardness o-rings can be inconvenient to install
– Custom colors may increase cost and require a larger MOQ with longer delivery ti…

Custom HNBR O-Ring Manufacturer in China

Perfluoroelastomer FFKM O ring Manufacturer

Product Details: The FFKM O-rings from JST Seals are made of perfluoroelastomer compounds with a higher fluorine content than FKM fluoroelastomers. These O-rings are known for their excellent resistance to chemical corrosion, including organic and inorganic acids, alkali, ester, ether, ketone, aldehyde, superheated water, and steam. They have a maximum operating temperature of 230 °C and can be manufactured into various forms such as O-rings, diaphragms, gaskets, rubber strips, and rubber plates. The mechanical properties include a hardness of Shore A 78, 100% modulus of 9.4 MPa, tensile strength of 15.9 MPa, and elongation at break of 130%[1].

Pros:
– Excellent chemical resistance to a wide range of aggressive chemicals, including…
– High temperature stability, with a maximum operating temperature of up to 230 °C…
– Long service life and reliability in harsh chemical environments.
– Versatile applications in industries such as semiconductor, petrochemical, mecha…
– High thermal, oxidative, and chemical stability due to carbon-fluorine bonds.

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

Viton O Ring Suppliers, Manufacturers, Factory

High-quality O-ring Seals Manufacturer-Topa

Product Details: O-rings are round seals that create a mechanical seal between objects to prevent leakage of liquids and gases. They are available in various materials such as polyurethane, neoprene, silicone, Buna-N, PTFE, etc., and are used in diverse industries including agriculture, industry, oil and gas, food, and construction. O-rings can be placed in gas cylinders, pumps, connectors, and other appliances to form a tight seal.

Pros:
– Can stop foreign contaminants and maintain lubrication between objects
– Lighter in weight, easy to install and remove
– Resistant to abrasion
– Can be adapted to extreme environments
– Reduce the possibility of leaks

Cons:
– Can leak due to incorrect installation, wrong size, excessive pressure, chemical…
– May melt or fail if the temperature exceeds the material’s limit range
– Improper installation or handling can cause thread damage

Stainless O Ring Manufacturer in China – HM

Product Details: The manufacturing process of stainless steel O rings at HM involves precision CNC machining, starting with the selection of high-quality stainless steel material. These O rings are made from various grades of stainless steel, such as 304, 304L, 316, and 316L. They are designed for durability and resistance to corrosion, making them suitable for a wide range of applications, including industrial, chemical, and aerospace industries.

Pros:
– Made from high-quality stainless steel for durability and corrosion resistance
– Precision CNC machining ensures high accuracy and consistency
– Suitable for various industries including industrial, chemical, and aerospace
– Available in multiple grades of stainless steel

Cons:
– No specific details on temperature and pressure limits are provided on the webpa…
– Limited information on custom size and shape options

Custom FEP O-ring Manufacturer in China

Product Details: YOSON FEP O-rings are produced from fluorocarbon or silicone with seamless FEP jackets. They are certified to ISO 3601, BS 4528, and AS 568 standards and are available in both inch and metric sizes. These O-rings are designed to solve sealing problems due to their low friction, chemical resistance, and elastic properties. They offer excellent temperature resistance, ranging from -60°C to +260°C, and are manufactured from FDA, USP Class VI compliant materials, and Sanitary 3A compliant materials. The FEP O-rings are used in various applications including automotive, industrial, medical, agriculture, and more.

Pros:
– High corrosion resistance
– Excellent temperature resistance (-60°C to +260°C)
– Chemical and wear resistance
– Low friction
– Elastic properties
– FDA, USP Class VI, and Sanitary 3A compliant materials
– Available in various colors and custom designs
– Suitable for a wide range of industries such as food and beverages, automotive,…

Cons:
– The fluoropolymer jacket’s slight stiffness can require custom application desig…
– May require specific gland design to maximize sealing without over-compressing t…

Custom O Ring Manufacturing in China with Quick Tooling …

Product Details: O-rings are toroidal elastomeric sealing devices designed to prevent the passage of fluids or gases between two mating surfaces under static or dynamic conditions. They are made from various elastomeric materials such as nitrile, fluorocarbon, silicone, neoprene, and EPDM. O-rings function based on the principle of zero-gap sealing, where the compressive force exerted by the mating surfaces deforms the o-ring, creating a barrier against leakage. They are used in a wide range of applications including aerospace, automotive, medical, and industrial sectors.

Pros:
– Exceptional sealing capabilities
– Flexibility and adaptability to various applications and sizes
– Cost-effective
– Reusable depending on material and application
– Lightweight and compact design
– Easy to install and maintain
– High sealing performance across a broad range of operating temperatures and pres…

Cons:
– Failure can occur due to improper installation, inadequate lubrication, abrasion…
– Requires precise sizing and material selection to ensure optimal performance
– Can be affected by extreme temperatures, chemical compatibility, and lubrication…
– Custom o-rings may present additional costs upfront

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, 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 suited for different applications, such as NBR for general use, FKM for high-temperature and chemical resistance, and Silicone for medical and food industries.

Can I customize the size and shape of o-rings from Chinese manufacturers?

Yes, you can customize the size and shape of o-rings from Chinese manufacturers. Many companies, such as Savvy and SWKS Seal, offer custom o-ring manufacturing services where you can provide your own design drawings or specifications. They have a wide range of molds and can produce o-rings in various sizes and shapes to meet your specific needs.

What are the typical minimum order quantities (MOQs) for o-rings from Chinese factories?

The minimum order quantities (MOQs) for o-rings from Chinese factories can vary. Some manufacturers have relatively low MOQs, such as 10-100 pieces, while others may require larger orders, typically ranging from 500 to 50,000 pieces. It depends on the specific manufacturer and the type of o-ring you are ordering.

Do Chinese o-ring manufacturers offer any certifications or quality assurances?

Yes, many Chinese o-ring manufacturers offer various certifications and quality assurances. Companies often hold certifications like ISO 9001, ISO 14001, IATF16949, and ISO 13485, which ensure that the products meet international quality and safety standards. Additionally, some manufacturers have certified laboratories to develop and identify compounds that meet specific market requirements.

Can I get free samples or prototypes from Chinese o-ring manufacturers?

Yes, some Chinese o-ring manufacturers provide free samples or prototypes for testing. For example, Dongguan Hongju Silicone Rubber Products Co., Ltd. offers free samples to potential customers. This allows you to test the quality and performance of the o-rings before placing a larger order. It’s always a good idea to ask about sample policies when contacting a manufacturer.