Are you looking for the best black O-ring factories in China? If so, you’re in the right place. In this article, we’ll compare some of the top manufacturers, highlighting their specialties, product quality, and what sets them apart in the industry. Let’s dive in and find the perfect fit for your needs.

Rubber O Ring NBR Black Color

Product Details: NBR (Nitrile rubber) O-rings are made from a copolymer of acrylonitrile and 1,3-butadiene. They are available in a wide range of dimensions and are suitable for both hydraulic and pneumatic systems. These O-rings can be used in static and low-pressure dynamic applications, including rod and piston seals. They have a hardness range of 30-80 Shore A and can operate over a temperature range of -30°C to +120°C, with special compounds extending this range. NBR O-rings comply with various standards such as EU 1935/2004, FDA, NSF, and DVGW for different applications including food and beverage, and gas distribution[3][4][5].

Pros:
– Excellent resistance to oils, fuels, greases, and many chemical substances.
– Optimal balance between flexibility and strength, allowing effective sealing und…
– Durable and wear-resistant, extending the seal’s lifespan and reducing maintenan…
– Wide applicability in various industries including automotive, aerospace, and in…
– Easy installation and removal, and economical sealing solutions.

Cons:
– Poor resistance to ozone and UV rays, making them unsuitable for outdoor use.
– Decreased low temperature flexibility as the acrylonitrile content increases.
– Not recommended for rotary movements or high-temperature applications without sp…
– Can become brittle with higher acrylonitrile content.

china manufacture black NBR 70 rubber o-ring with high …

Product Details: The Black NBR 70 Shore O-Ring is made from Nitrile Butadiene Rubber (NBR) with a hardness of 70 Shore A. It is used for hydraulic and pneumatic sealing applications. The O-ring is designed to be seated in a groove and compressed during assembly to create a seal. It can handle temperatures from -30℃ to 100℃ and pressures up to 60 MPa. The O-ring is suitable for various mediums including hydraulic oil, anti-fire fluid, water, and gas. It is commonly used in equipment such as excavators, loaders, graders, and other heavy machinery.

Pros:
– Inexpensive and easy to manufacture
– Reliable and simple mounting requirements
– Can seal high pressures up to 60 MPa
– Suitable for a wide range of temperatures and mediums
– High friction resistance and durability

Cons:
– Not recommended for dynamic applications with insufficient lubrication
– Service life can be affected by system lubrication, pressure, temperature, and m…
– Limited performance in rotary motion without adequate lubrication

FKM O Rings, China NBR O Ring supplier

China O Rings Manufacturers and Suppliers

China Black NBR 70 O-Ring Supplier – King Rubber

China Factory High Quality NBR O Ring Seals 70 Shore …

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. O-rings are available in various hardness levels, typically measured in Shore A units, ranging from 40 to 90, with 60-70 being the most

common. They can be produced in different colors and are compliant with various standards such as RoHS and REACH.

Pros:
– Good property and low cost of NBR
– Best comprehensive performance of FKM/Viton
– FDA compliance, tastelessness, and non-toxicity of Silicone
– High temperature and severe cold resistance of Silicone
– Wide range of hardness levels and colors available
– Compliance with RoHS and REACH standards
– Custom o-rings available at low mold/tooling cost and fast delivery

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

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 hardness levels (30 to 80 durometer Shore A) and colors, and can be custom-made for various applications.

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 and biocompatible, making them suitable for medical and food applicati…
– Can be formulated to meet specific needs such as conductivity, fungus resistance…

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…
– Can stretch easily during installation if in low durometers

China Wholesale Black Nbr 70 O-Ring Manufacturer, Factory

Product Details: NBR 70 Shore A O-rings are made from nitrile-butadiene rubber, a synthetic polymer obtained by the copolymerization of acrylonitrile and 1,3-butadiene. They have a hardness of 70 ±5 IRHD, tensile strength of 14.4 MPa, and elongation at break of 389%. The density is 1.28 ±0.03 g/cm³. These O-rings are highly resistant to oils, fuels, greases, and various chemical substances, and they can withstand temperatures from -30°C to +120°C.

Pros:
– Excellent resistance to oils, fuels, greases, and many chemical substances.
– Optimal balance between flexibility and strength, allowing effective sealing und…
– Durable and wear-resistant, extending the seal’s lifespan and reducing maintenan…
– Complies with DVGW DIN EN 549 H3/B2 (-20…+80°C) standards.

Cons:
– Low temperature flexibility decreases as the acrylonitrile content increases, po…
– May not be suitable for applications requiring high low-temperature flexibility.

Viton O Ring Suppliers, Manufacturers, Factory

Comparison Table

Frequently Asked Questions (FAQs)

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

Black o-rings in Chinese factories are often made from several common materials. Nitrile Butadiene Rubber (NBR) is one of the most popular due to its good properties and low cost. Other materials include Fluorinated Rubber (FKM or Viton), Ethylene Propylene Diene Monomer (EPDM), and Hydrogenated Nitrile Butadiene Rubber (HNBR). Each material has its own unique characteristics and is suited for different applications, such as NBR for general-purpose sealing and FKM for high-temperature and chemical-resistant needs.

What are the typical sizes and standards for o-rings produced in China?

O-rings produced in Chinese factories come in various sizes and standards. You can find o-rings in both imperial and metric sizes, adhering to standards such as AS568 for the USA, BS1516 for the UK, DIN 3771 for Germany, JIS B 2401 for Japan, ISO 3601 for international use, and GB 3452.1 for China. The size of an o-ring is specified by its inside diameter (ID), outside diameter (OD), and cross-section (CS) or width.

Can Chinese o-ring factories provide custom and specialized o-rings?

Yes, many Chinese o-ring factories offer customized and specialized o-ring solutions. You can get o-rings made according to your specific drawings or samples. These factories use various production methods like die cutting, transfer molding, and injection molding to create custom o-rings. They also offer services such as OEM and ODM, allowing you to get tailored products at reasonable prices and with low minimum order quantities (MOQs).

What kind of certifications and quality standards do Chinese o-ring factories adhere to?

Chinese o-ring factories often adhere to stringent quality and certification standards. Many of these factories are certified with ISO 9001 for quality management, ISO 14001 for environmental management, and IATF 16949 for the automotive industry. These certifications ensure that the products meet high standards of quality, reliability, and safety.

How do Chinese o-ring factories handle sampling and delivery?

Chinese o-ring factories typically offer free samples for testing, although you might need to cover the freight cost. For delivery, these factories often have well-established logistics systems, allowing for prompt and efficient shipping. Some factories even offer door-to-door courier services, ensuring that your products are delivered quickly and at a low cost. The delivery time can vary from a few days for in-stock items to a couple of weeks for custom orders.