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O ring cord is a round rubber cord commonly used for many sealing applications. It comes in a range of metric and imperial sizes. The advantage of o ring cord is that it is purchased by the metre so it can be used to make non-standard size seals.
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Benefits of O-Ring Cord
They Prevent The Entry Of Foreign Contaminants.
Oil seals and O-rings are just like glue. They seal everything together such that there are no spaces left for any entry of foreign materials. The entry of these foreign materials means that there will be contamination of the fluids or worse still there be reactions with these foreign materials. With the right type of oil seal and O ring, you are assured that your fluid will not be contaminated in any way.
Maintaining A Bearings Lubricity
When it comes to precision bearing, the seal and O ring must seal the areas completely to help them reduce non-lubricity. If there happens to be any non-lubricated contact from the seals or any other components, there might be a very hazardous result. There will be seal damage meaning that you will have to keep on maintaining these seals for them to last longer or replace them to get the long-lasting service you may need. A seal should be able to remove any spaces that might be in-between the parts so that all the components can resist non-lubricity.
Easy To Assemble
When it comes to assembling O rings and oil seals, it will not require any extra knowledge apart from what you might already have. The steps to assembling them are straightforward. You only need to be extra careful to ensure that during this assembling process, every part is in place and also that the seals are tight such that there will be no leakages. You can as well make an enquiry from oil seal suppliers on how to assemble the seals.
Can Perform In Extreme Conditions
These seals have been created to work in very extreme conditions. The way they have been manufactured gives them a competitive advantage over other seals. They are not easily interfered with. This means that you do not have to worry about what to do when if the conditions where the seals will be used will not be favourable enough. This ability makes them highly advantageous over other seals and all kinds of applications.
What are the Applications of O-Ring Cord
Automotive field
In the automotive field (cars, motorbikes and trucks) o-rings can be used for: powertrain, filter systems, brake systems, airbag systems, chassis, suspension, power steering systems, air intake systems, exhaust systems, gearboxes, injection systems, lighting systems and specific sealing solutions.
Chemical industry
In the chemical industry, FKM or FPM o-rings, also known as fluorinated elastomers that are highly resistant to ozone, synthetic liquids, mineral oils and many other chemical agents, are most commonly used. In contrast, o-rings made of silicone materials are resistant to high temperatures, while EPDM elastomers have good weather resistance.
How to Choose O-Ring Rope
Determine the o-ring material
Determine the o-ring material based on the application requirements like temperature, pressure, and media. Getting an o-ring replacement can be difficult if the material of the existing o-ring is not known. Use a rubber indicator test to determine the material.
Measure the o-ring size
O-rings are usually specified by their inner diameter, outer diameter, and cross-sectional width. At times, o-rings of standard sizes may not be suitable for specific requirements in existing systems; use custom-made o-rings in this case. Read our article on o-ring sizes for more information.
Determine the hardness
The hardness of the o-ring determines its ability to resist extrusion and deformation. Hardness is measured in a durometer and can range from 30-90. For example, an o-ring with a durometer reading of 60 is softer than 70, while 90 is stiff compared to a reading of 70.
International standards
O-rings are manufactured to conform to various international standards such as ISO, DIN, and JIS. These standards ensure that o-rings have uniform dimensions, tolerances, and material properties, making them interchangeable and compatible with different applications. A few examples of these standards specific to o-rings are ISO 3601, DIN 3771, and JIS-B2401.
Special cases
There are various o-ring types designed for specific connections or applications. For example, SAE (Society of Automotive Engineers) flange o-rings are designed to fit into SAE flange connections commonly used in hydraulic systems.
O-Ring Cord Materials
Nitrile (Buna-N): This is the most widely used o-ring material. It provides excellent resistance to petroleum products. It also offers an excellent compression set, tear, and abrasion resistance. It does not offer good resistance to ozone, sunlight, or weather unless it is specifically compounded to do so. Temperature range: -40° to +250°F.
Fluoroelastomer: This elastomer offers excellent mechanical and physical properties with good resistance to petroleum products, low compression set, and high-temperature resistance. Ideal for vacuum service and low gas permeability. Temperature range: -15° to +400°F.
Chloroprene: This elastomer is moderately resistant to petroleum and offers good ozone and weather resistance and good compression set. Excellent for sealing refrigeration fluids such as Freon®. Temperature range -65°- +250°F.
Silicone: This elastomer is ideal for weather and ozone resistance. It offers limited oil resistance and is not recommended for dynamic sealing applications due to poor tensile and tear strength and low abrasion resistance. Temperature range -80° - +450°F.
Highly Saturated Nitrile: This material offers better resistance to high temperature, superior physical properties, and improved chemical resistance over traditional nitrile compounds. It has improved resistance to ozone and sunlight and excellent resistance to compression set. Temperature range -40°- +325°F.
Ethylene Propylene (EPM, EPDM) (EPR): Excellent resistance to Skydrol® fluids used in commercial aircraft hydraulic systems. Recommended for hot water, steam, and phosphate ester-type hydraulic fluids. Resistance to some acids, alkalies, and ozone. Not recommended for petroleum fluids or diester lubricants. Temperature range: 65° - +300°F.
PTFE: This is a white thermoplastic fluoroethylene resin that offers heat resistance, low friction, dielectric strength, weatherability, toughness, no water absorption, and flexibility. Temperature range: -65°- +500°F.
What is The O-Ring Cord Manufacturing Process ?
Mixing of rubber raw materials
Firstly, it is necessary to mix the rubber raw materials with processing aids, and then pre-treat them through a high-speed mixer to make them in a highly plastic state.
Rolling and extrusion
Put the mixed rubber raw materials into a rolling machine or extruder for molding. In this step, it is necessary to control the shape and size of the sealing strip by controlling factors such as pressure and temperature according to the requirements of the sealing strip.
Cutting and assembly
Then assemble it. Some sealing strips require joint processing to facilitate processing into longer sealing strips.
Product testing
Qualified sealing strips need to be inspected to ensure good weather resistance, wear resistance, and sealing performance.
What Factors To Consider When Selecting An O-Ring Cord
Material Selection
Selecting the appropriate material for your o-ring is very important and is your starting point when shopping for an o-ring.
Temperatures
The temperature the o-ring will be exposed to is an important consideration when choosing the proper o-ring for your application. Temperatures can adversely affect the performance of even the best-made o-ring. If the operating temperature is too cold, the o-ring will lose its elasticity and become more brittle, making breakage likely. On the other end of the spectrum, if an o-ring gets too hot, it can become too flexible, and degradation will occur.The importance of temperature is why you'll always see temperature ranges on our products. The ability to see the temperature ranges will help you determine if the material is best suited to your specific application.
Operating Pressure
Operating pressure is also an important consideration when you are purchasing o-rings. Typically, in a static sealing setting, a standard 70 shore hardness will usually work well. Yet, once pressure approaches the 1500+ psi range, you may need to consider a shore hardness of 80-90.
Surface Finish
Surface finish is also an important consideration. Generally speaking, the ideal surface finish for dynamic surfaces is 5 to 16 µ inch RMS. Smoother and rougher surfaces can result in increased friction and reduced life of the seal. Rougher finishes up to 64 µ inch RMS can be used in static applications.
O-Ring cord are bi-directional seals, circular in shape and cross section. O-Ring cord are generally made of an elastomeric material, but may be made of other materials such as PTFE or metal.An O-ring seals through the deformation of the seal material by installation and media pressure to close off the gap between mating components. Higher system pressures can cause deformation through the gap, known as extrusion, resulting in seal failure. Choosing a harder seal material or installing back-up rings to support the O-Ring cord may alleviate this problem.
The rubber O-Ring cord should be considered as an incompressible, viscous fluid having a very high surface tension. Whether by mechanical pressure from the surrounding geometry or by pressure transmitted through the hydraulic fluid or gas, this extremely viscous (elastomeric) fluid is forced to flow in the gland to produce zero clearance or a positive block to the flow of the media being sealed. The O-Ring cord absorbs the stack-up of tolerances of the unit and its memory maintains a sealed condition.
5 Must-Follow O-Ring Cord Maintenance Tips
Inspect O-Ring cord regularly
One of the most critical aspects of maintaining O-ring cord is routine inspection. Over time, O-ring cord can become unreliable seals that are brittle. These outdated O-rings may crack or even tear. To prevent leaks or premature failures, inspect your O-ring cord regularly, especially if they are exposed to corrosive environments, accumulated solids, harsh environmental conditions, or harsh chemicals.
Avoid using incompatible chemicals
Some chemicals can degrade or damage certain O-ring cord materials, causing performance-reducing cracks, stains, discoloration, swelling, shrinkage, or hardness changes. Be sure to select a material compatible with the chemicals used in your application and avoid using any incompatible chemicals that could damage the O-ring.
Keep O-ring cord lubricatedProper
O-ring cord lubrication can help these sealing solutions maintain flexibility and prevent friction damage. Choose a lubricant compatible with the O-ring cord material and the application in which it is used, and be sure to apply the lubricant evenly and avoid over-lubricating, which can attract dirt and debris.
Clean O-ring cord regularly
Regular cleaning of equipment and O-ring cord can help prevent contamination that could lead to premature failures or leaks. Follow the manufacturer's recommendations for cleaning and disinfecting your equipment and O-ring cord to maintain optimal performance.
ReplaceO-ring cord on schedule
Even with proper maintenance, O-ring cord will eventually wear out and must be replaced. Keep tabs on the manufacturer's recommended schedule for replacing O-ring cord to avoid unexpected failures or leaks.
Our Factory
Ningbo ZhongGao Seal Technology Co., Ltd. Which was specialized in research, production, sales, and distribution. Factory predecessor is located in Xiamen, Shenzhen, currently has over 9000 square meters of modern plant, with more than 300 employees, more than 40 senior technical staff. Our main products are: O-ring, X-ring, Y-ring, D-rings, rubber flat washer, ED rings, rubber strips, rubber ball, all kinds of skeleton oil seal, glyd ring and step seal, polyurethane oil seal, pneumatic seals and all kinds of rubber parts for the design according to customer request.
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FAQ
Q: What is an O-ring cord?
Q: What are O-rings for switches?
O-ring sound dampeners can be installed onto the keycaps to dramatically reduce the sound created from when a switch is fully depressed or "bottomed out." An O-ring will eliminate this clack by stopping the stem from going all the way down.
Q: What is the difference between O-ring and seal?
Q: What is the O-ring used to prevent?
Q: Do O-rings make a difference?
Q: What is the most common type of O-ring?
Nitrile - also known as NBR - is probably the most widely used elastomer in the seal industry at the time of writing. NBR o-ring kits and NBR seals are found in a staggering number of applications.
Q: What type of O-rings are best?
Offering outstanding chemical and high-temperature resistance, fluorocarbon O-rings are among the most durable and versatile available. They are particularly valuable in aircraft engines and automotive fuel handling systems because they resist swell in high-octane and oxygenated fuels.
Q: What happens if an O-ring fails?
Q: Are O-rings always rubber?
Q: Are thicker O-rings better?
Q: What is the strongest O-ring?
Q: How long will an O-ring last?
Q: How many types of O-rings are there?
Nitrile (Buna), Neoprene, Ethylene Propylene (EPDM Rubber), Silicone, Fluorocarbon (Viton), and PTFE (Teflon) are among the most commonly used compounds for O-rings and seals.
Q: Which is better O-ring or D ring?
Q: Can O-rings be flat?
Q: Why do O-rings stretch?
Q: How do you know if an O-ring is bad?
Q: Are silicone O-rings better?
Q: Should O-rings be hard?
Q: How flexible are O-rings?
As they are made of flexible rubber material, these accessories are highly versatile and has the capacity to deform themselves so as to suit any shape found in the cavity that is near the clearance gap.It depends on what effect you are trying to achieve. If you want to quiet down the keyboard and soften the landing, get soft o-rings, ie in 40A or 50A durometer.Pulses of high pressure can cause the clearance gap between the mating edges to open and close. This can lead to the O-ring becoming trapped between the sharp edges of the mating surfaces, resulting in physical damage to the seal surface often referred to as nibbling.
Zhonggao Seal Technology is one of the leading O-ring cord manufacturers and suppliers in China. Our factory has a wide varieties of O-ring cord products in stock. Please be free to buy the bulk products from us. and we will also offer the customized service if necessary.
metric o ring cord, stock o ring cord, sealing product
