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A sealing ring is a type of mechanical seal used to prevent the leakage of fluid or gas between two surfaces. It is typically used in applications such as pumps, valves, and engines, where a tight seal is required to prevent leaks.Sealing rings are also commonly known as O-rings, gaskets, or seals. These terms are often used interchangeably to refer to the same type of component used for sealing applications in various industries such as automotive, plumbing, and machinery. The choice of terminology can depend on factors such as the shape, size, and material of the sealing ring.
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![Blue Silicone O-ring]()
Blue Silicone O-ringOur products have excellent durability and wear resistance, while providing excellent sealing function. Our blue silicone O-ring is designed to withstand extreme temperatures without sacrificing... -
![FEP Encapsulated Rubber O Ring]()
FEP Encapsulated Rubber O RingFEP Encapsulate O-ring has good resistance to hardening and brittleness, while the inner core made of silicone rubber or fluororubber maintains good elasticity of the sealing ring at high... -
![Rubber FEP Encapsulated O Rings]()
Rubber FEP Encapsulated O RingsFEP Encapsulated O-ring is a relatively important type of rubber products we produce. The combination of the dense and uniform surface and seamless FEP/PFA outer covering layer and the rubber... -
![FEP Encapsulated Solid Silicone Cord Seal O Ring]()
FEP Encapsulated Solid Silicone Cord Seal O RingFEP Silicone Encapsulated O-ring is a combination of a dense, uniform, and seamless FEP/PFA encapsulated layer and a rubber core, which ensures that the encapsulated O-ring is sealed uniformly as... -
![PTFE Silicone Color O Ring]()
PTFE Silicone Color O RingSilicone colored FEP Encapsulated O-ring has good resistance to hardening and brittleness, while the inner core made of silicone rubber or fluororubber maintains good elasticity of the sealing... -
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Red Coating O RingRed coated O-ring The main advantages are excellent chemical resistance, wide temperature range except for alkali metals or fluorides at high temperatures, good high pressure resistance,... -
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Blue Nbr Rubber O RingBlue NBR rubber o-ring: NBR contains polar nitrile groups and is suitable for non-polar or weakly polar mineral oils. It has good resistance to chemical substances such as animal and vegetable... -
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NBR Coating O RingNBR Encapsulated O-ring: The rubber core hardness ranges from 20A to 90 A. The working temperature is -40 ℃/-40F-150 ℃/302F. NBR Encapsulated O-ring can keep rubber O-ring away from sunlight and... -
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Customize Rubber Seal StripCustomized rubber cord are suitable for a variety of applications, including use with windows, doors, automobiles, equipment, and so on. The customized rubber cord provide excellent protection... -
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White Silicone Seal Rubber StripHigh-quality White Silicone cord can be manufactured in our factory, which is a durable and versatile product used for sealing the top of Recreational Vehicle. Its primary material is silicone,... -
![Small Red Color PTFE Encapsulated Seal O Ring]()
Small Red Color PTFE Encapsulated Seal O RingZG offers you bulk small red color ptfe fep encapsulated seal ring.small red color ptfe fep encapsulated seal ring, China, factory, suppliers, manufacturers, customized, bulk, in stock it can be... -
![Small PTFE Encapsulated O Ring]()
Small PTFE Encapsulated O RingSmall PTFE Encapsulated O-ring has good resistance to hardening and brittleness, while the inner core made of silicone rubber or FKM maintains good elasticity of the sealing ring at high...
Benefits of Sealing Ring
Good sealing performance
Sealing Ring has stable sealing performance in all kinds of liquids, gases and chemicals, which can effectively prevent the leakage of liquids and gases. Due to its unique design, the O-ring can form a complete seal, thus effectively preventing leakage of liquids, gases and chemicals.
Wide range of applications
Sealing Ring can be used in a wide range of temperature and pressure, from -60℃ to +220℃, which can meet the requirements of various working conditions. O-ring seals are widely used in various industries such as automotive, aerospace, chemical and medical equipment. Due to its good sealing performance, abrasion resistance, corrosion resistance and adaptability, O-ring has become the preferred seal for many equipments.
Simple installation and disassembly
Sealing Ring seals are designed with simple shapes and mounting parts for easy installation and disassembly. Its unique O-shape structure can be easily installed on a variety of equipment, and due to its simple structure, O-ring seals are also very easy to disassemble. This design makes O-ring seals very popular in practical applications, especially where frequent replacement or repair is required.
Abundant size series and standardized materials
Sealing Ring seals have abundant size series, which can meet the requirements of various equipments, and use standardized materials, which are easy to select and obtain, and the price is relatively low.
High strength and abrasion resistance
Sealing Ring seals have very good abrasion resistance and can withstand high friction and pressure. After strict heat treatment, such as annealing, normalising, quenching and tempering, O-ring seals have high hardness and high strength, so that they can maintain good sealing performance under various working conditions.
Good corrosion resistance
Sealing Ring can be used in a variety of corrosive environments with good corrosion resistance. It is because O-ring seals are usually made of special materials, such as polyurethane, fluoroelastomer, silicone rubber, etc. These materials have good corrosion resistance, and can effectively resist the erosion of various chemicals.
What are the Applications of Sealing Ring
Hydraulic system
Sealing Ring seals are often used in hydraulic systems, such as hydraulic cylinders, oil pumps and valves. Their excellent sealing properties help prevent fluid leakage and ensure proper operation of hydraulic systems.
Automation equipment
Many automation equipment require Sealing Ring seals to ensure a sealed connection between components, such as cylinders, valves, pneumatic tools, etc. They help improve equipment productivity and reliability.
Automotive industry
Sealing Ring seals are widely used in key components such as automotive engines, braking systems and fuel systems. Its high temperature resistance, oil resistance and wear resistance make it an indispensable component in the automotive industry.
Pipes and pipe systems
Sealing Ring seals are widely used in various pipes and pipe systems, such as water pipes, air pipes and chemical pipes, etc. They can effectively prevent liquid or gas leakage and ensure the safety and reliability of the system.
Types of Sealing Ring
Viton™ O-rings
Also known as FKM O-rings, Viton™ O-rings are made from fluorocarbons and boast resistance to temperatures from -40°C up to 250°C, low gas permeability, superb mechanical characteristics and a low compression set. They are highly suitable for use with acids, halogenated hydrocarbons, petroleum and silicone fluids or gases. However, they should not be used in conjunction with amines, esters, ethers with a low molecular weight, hot hydrofluoric acids or Skydrol. Their incredible versatility makes them popular in a wide range of industries, including the automotive sector, aviation, chemical processing and mechanical engineering plants.
FEP O-rings
FEP O-rings pair a silicone or fluorocarbon core with a coating of fluorinated ethylene propylene (FEP), which offers users several distinct advantages over a standard PTFE O-ring. Firstly, they are capable of handling temperatures of between -60°C and 260°C for silicone cores and -20°C and 204°C for fluorocarbon cores. Secondly, they also provide superb elasticity and low friction levels in comparison to their PTFE counterparts. Although they are best suited to static applications, they can also be adaptable to dynamic ones where the movement is slow and short. This makes them popular in the chemical, food, petrochemical and pharmaceutical industries.
PFA O-rings
O-rings which are encapsulated with perfluoroalkoxy (PFA) are an attractive alternative to PTFE or FEP O-rings which offer several advantages over their competitors. In comparison to PTFE, PFA O-rings are a more cost-effective option, while the substance has greater resistance when dealing with temperatures of above 250°C than FEP does. Similarly, it is also better equipped to keep a variety of chemicals from permeating its seal, making it ideal for use within the chemical and petrochemical industries, the food sector and with pharmaceutical organisations.
USP Class VI O-rings
In this context, USP stands for United States Pharmacopeia and the rubber compounds which have achieved a Class VI certification definitely offer a unique selling point, too. All of the elastomers which receive this accreditation are subjected to rigorous testing procedures, which assess their consistency, purity, quality and strength to ensure they are safe for use in situations where human life is at stake. As such, USP Class VI O-rings are in high demand among the medical and pharmaceutical industries.
Sealing Ring Material
Rubber
Rubber is a popular material for sealing rings due to its flexibility and resistance to wear and tear. It can be used in a range of temperatures and pressures, making it suitable for many applications.
Silicone
Silicone is a synthetic material that is highly resistant to heat and cold. It can be used in high-temperature applications and is often used in the automotive industry.
PTFE
PTFE, or polytetrafluoroethylene, is a synthetic material that is highly resistant to chemicals and heat. It is often used in high-pressure applications and is also known for its non-stick properties.
Metal
Metal sealing rings are often used in high-pressure and high-temperature applications, such as in industrial machinery or oil and gas pipelines. Common metals used for sealing rings include stainless steel, copper, and aluminum.
Ceramic
Ceramic sealing rings are highly resistant to wear and can be used in high-temperature and high-pressure applications. They are often used in pumps and compressors.
Guidelines for Installing Sealing Ring
Use the right size O-ring for each unique assembly. O-rings that are too small are more prone to tearing and breakage. O-rings that are too large will not provide an adequate seal.
Each O-ring has a maximum stretch point. Overstretching can cause O-rings to break or tear during assembly or use. Engineers need to ensure that the stretch does not go beyond the maximum elongation of the O-ring. It's also important to stretch the O-ring evenly, not just on one side or the other. In general, try to stretch the O-ring as little as possible for a tighter fit.
Rolling an O-ring down a shaft for installation leads to spiraling. Spiral wound O-rings cannot be properly installed and their functionality will be limited. This can result in leaks and/or damage to the finished assembly. Sliding the O-ring into place, rather than rolling it, helps avoid spiraling. Using a lubricant helps the O-ring slide easily into place.
O-rings are often mated with threaded parts. The threads can easily tear the rubber O-rings. Covering the threads with masking tape during installation and using an assembly lubricant can help protect the O-ring from nicks and tears.
Some mated parts may also have sharp corners or edges that can damage O-rings. Sometimes these tears are so small they are not visible, resulting in leakage problems later on. Avoid forcing O-rings onto sharp corners and edges. Lubricating the O-rings makes it easier to slide them into place.
Process of Sealing Ring
Extrusion
Many sealing ring are made by extrusion. Extrusion is a manufacturing process in which raw material is forced through a die or series of dies. As the material goes through the die, it takes the shape of the die. For o-rings, a ring-shaped die is used.There are different forms of extrusion. Some of them involve the use of a hopper. In other words, the raw material is fed into a hopper where it's heated. After being heated, the raw material is then forced through a die or series of dies. Other forms of extrusion include cold extrusion, friction extrusion and microextrusion.
Pressure Molding
Another manufacturing process used to create sealing ring is pressure molding. Also known as compression molding, it involves the use of heat and pressure to create three-dimensional objects. To create sealing ring, some manufacturing companies inject preheated material, such as rubber, into a mold cavity. The mold cavity is then fitted with a plug on top, which is able to pressure the mold cavity. As pressure increases inside of the mold cavity, the preheated material takes the shape of the mold cavity.
Transfer Molding
Some sealing ring are created by transfer molding. Transfer molding is similar to pressure molding. With both manufacturing processes, preheated material is placed inside of a mold cavity. The difference is that compression molding requires an open mold cavity, whereas transfer molding requires a closed mold cavity. Transfer molding is able to create higher pressure because of its closed mold cavity. Therefore, finished objects, such as sealing ring, are often thicker and feature a more consistent design.
Injection Molding
Injection molding is a manufacturing process that's used to create sealing ring. It involves injecting raw material into a mold cavity. The raw material typically comes in the form of pellets. The pellets are heated, after which the newly liquified material is injected into a mold cavity.
Maintenance Tips for Sealing Ring
Inspect sealing ring regularly
One of the most critical aspects of maintaining sealing ring is routine inspection. Over time, sealing ring can become unreliable seals that are brittle. These outdated sealing ring may crack or even tear. To prevent leaks or premature failures, inspect your sealing ring 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 sealing ring 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 sealing ring.
Keep sealing ring lubricated
Proper sealing ring lubrication can help these sealing solutions maintain flexibility and prevent friction damage. Choose a lubricant compatible with the sealing ring 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 sealing ring regularly
Regular cleaning of equipment and sealing ring can help prevent contamination that could lead to premature failures or leaks. Follow the manufacturer's recommendations for cleaning and disinfecting your equipment and sealing ring to maintain optimal performance.
Replace sealing ring on schedule
Even with proper maintenance, sealing ring will eventually wear out and must be replaced. Keep tabs on the manufacturer's recommended schedule for replacing sealing ring 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.
Certificate
FAQ
Q: What is the purpose of the sealing ring?
Q: What is O-ring sealing?
Q: Why is sealing necessary?
Q: What is seal ring and mating ring?
Q: What is the difference between sealing ring and O-ring?
Q: Why do guys wear signet rings?
Q: Is an O-ring a gasket?
Q: What is seal ring made of?
Q: What is the difference between seal and sealing?
Q: What is sealing technology?
Q: What are the two purposes of a seal?
Q: Why use Viton seals?
Q: Can O-rings be flat?
Q: Why are O-rings made of rubber?
Q: Why do people use O-rings?
Q: What should slip ring seals be installed with?
Q: How is an O-ring and back up ring installed in a component?
Q: Should I use a gasket or an O-ring?
Q: What is a PTFE O-ring?
Q: Can an O-ring replace a gasket?
Zhonggao Seal Technology is one of the leading sealing ring manufacturers and suppliers in China. Our factory has a wide varieties of sealing ring products in stock. Please be free to buy the bulk products from us. and we will also offer the customized service if necessary.
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