Are you looking for the best o-ring and seals factories in China? With so many options available, choosing the right one can be overwhelming. In this article, we’ll compare some of the top manufacturers in China, highlighting their strengths, 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

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, FKM, 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 customized and standard sizes like AS568 and ISO 3601. 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 manufacturing process involves strict quality control, and the company offers free samples and

flexible payment terms[1][3][5].

Pros:
– Good shock-proof, heat insulation, and sound insulation performance.
– Excellent flexibility and anti-compressive deformation, chemical resistance.
– High temperature resistance and low temperature resistance capabilities.
– Long service life and good sealing solutions.
– Easy installation and reduced risk.
– Customizable specifications, packing, and color according to customer’s requirem…
– Immediate delivery from a large inventory of over 300 million o-rings.
– Experienced staff providing fluent English support and quick response to inquiri…

Cons:
– Minimum order quantity (MOQ) requirements, which can be a barrier for small orde…
– Payment terms require 100% advance payment for amounts less than US$1000 or US$2…
– Shipping costs for samples need to be covered by the customer.

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

China O Rings Manufacturers and Suppliers

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 popular sizes, either in inches or 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 popular sizes) for 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 material types (NBR and FKM), which may not be suitable for…
– No mention of availability for custom sizes or special orders beyond the standar…

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

Product Details: Savvy manufactures a wide range of o-rings made from various materials including rubber, metal, and other materials. The most commonly used materials are NBR, FKM (Viton), and Silicone. NBR is widely used due to its good properties and low cost. FKM/Viton offers the best comprehensive performance and is used in high-standard sealing equipment. Silicone is often used in medical and food industries due to its FDA compliance, tastelessness, non-toxicity, and resistance to high temperatures and severe cold. The temperature range for these o-rings varies, with Silicone ranging from -70°C to 220°C. The hardness of o-rings is measured in Shore A,

typically ranging from 40 to 90, with 60-70 being the most common. Savvy also produces encapsulated o-rings, backup-rings, x-rings, and custom o-rings with low mold/tooling costs and fast delivery.

Pros:
– High-temperature and FDA food grade compliance for certain materials
– Wide range of materials available (NBR, FKM/Viton, Silicone, etc.)
– Low mold/tooling costs for custom o-rings
– Fast delivery options
– High precision and various sizes and shapes available
– Good wear resistance, oil resistance, and corrosion resistance depending on the…

Cons:
– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p…
– High hardness o-rings can be inconvenient to install
– Specific materials may have limited temperature and pressure resistance

Viton O Ring Suppliers, Manufacturers, Factory

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

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:
– High-sealing capabilities and durability in low- or high-stress environments.
– Versatile and adaptable to various industrial applications.
– Available in numerous standard and custom sizes, materials, and styles.
– Can be optimized with surface coatings for reduced wear and tear and ease of ins…
– FDA-compliant and suitable for food, pharmaceutical, and other critical applicat…

Cons:
– Chemical attack and swelling are primary causes of O-ring failure.
– May require specific material selection based on the application to ensure compa…
– Encapsulated O-rings, while offering excellent chemical resistance, are limited…

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 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] – Low off-gassing and extractable levels, making them suitable for clean environme…
– Excellent compression set resistance and tensile strength for maintaining sealin…

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 O-Ring and Seals Factories in China

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

Chinese factories typically use a variety of materials to manufacture o-rings, including NBR (Nitrile Butadiene Rubber), FKM (Fluoroelastomer, also known as Viton), Silicone, EPDM (Ethylene Propylene Diene Monomer), and HNBR (Hydrogenated Nitrile Butadiene Rubber). Each material has its own unique properties and is chosen based on the specific application and required performance.

Can Chinese o-ring factories produce custom sizes and shapes?

Yes, many Chinese o-ring factories offer customized sizes and shapes to meet your specific needs. They often have thousands of molds and can create custom o-rings at a relatively low mold and tooling cost. This flexibility allows you to get the exact o-ring you need for your particular application.

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

O-rings from Chinese factories are widely used in various industries, including machinery, automobiles, mining, engineering construction, food processing, and medical equipment. They are versatile and can be used in both dynamic and static sealing applications, making them a crucial component in many different types of equipment.

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

Chinese o-ring factories often adhere to international quality standards such as ISO 9001, ISO 14001, and IATF 16949. These certifications ensure that the manufacturing processes meet rigorous quality control standards. Additionally, many of these factories are audited suppliers, which further guarantees their commitment to quality and reliability.

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 complexity of the order. Generally, peak season lead times are within 15 workdays, while off-season lead times can be up to a month. For custom orders, the lead time might be slightly longer, but many factories offer fast delivery options through door-to-door courier services.