Understand Rubber Sealing Rings
Rubber sealing rings are also the sealing rings and seals that people often talk about. They belong to a category of rubber products. Its scope of application is for sealing. It has properties such as oil resistance, acid resistance, wear resistance, and oxidation resistance.
The rubber sealing ring has strong temperature adaptability and can be used at -50°C to 250°C. It can be used almost forever at 150°C without performance change, and special materials can reach the standard 300°C. Therefore, even boiling water will not easily cause harm to the rubber sealing ring. If what needs to be sealed is food, silicone rubber sealing rings can also be used because silicone rubber products are non-toxic and odorless, and have grade qualification certification systems, such as food-grade silicone rubber, medical-grade silicone rubber, etc.
Rubber sealing rings also have good insulation properties. Their dielectric loss, voltage resistance, arc resistance, corona resistance, volume resistivity and surface resistivity are all in insulating materials, and their electrical properties are less affected by temperature and frequency.
For this reason, the waterproof performance of the rubber sealing ring is very good. And different types of sealing rings can be produced according to different sealing objects, such as fluorine rubber sealing rings, neoprene rubber sealing rings, nitrile rubber sealing rings, etc.
The Difference Between Seals and Sealing Rings
Seals refer to a category used to seal the contact surfaces between parts. It includes sealing elements of various shapes, materials and sizes, such as O-rings, oil seals, etc. Usually, seals broadly include sealing rings.
The sealing ring is a seal of a specific shape, usually annular, used to connect two parts and play a sealing role. It is made of ring-shaped rubber as the main material and has the characteristics of pressure resistance, wear resistance, high temperature resistance, etc. It is widely used in machinery, automobiles, aviation and other fields.
Therefore, seals and sealing rings are both components used to seal parts. The main difference between the two lies in the range and shape of the two. Seals are more common than sealing rings, while sealing rings are a special form of sealing.
How to Identify The Raw Materials of Rubber Sealing Rings
Sealing rings come in different shapes and materials and are used in various industries, including machinery, hydraulics, pneumatics, etc. How to distinguish the quality of materials among so many seals (mechanical seals, hydraulic seals, CR seals, rubber seals, etc.)?
Usually what we call natural rubber refers to the solid material made from natural latex collected from rubber trees and processed through coagulation, drying and other processes. Natural rubber has high elasticity at room temperature, is slightly plastic, has very good mechanical strength, small hysteresis loss, and low heat generation during repeated deformation, so it has good flex resistance and electrical insulation properties.
The types of rubber sealing ring raw materials can be distinguished according to the following methods:
1. According to the appearance and shape of rubber
Rubber can be divided into four categories: solid rubber (also known as dry rubber), emulsion rubber (latex for short), liquid rubber and powder rubber.
2. According to the source and method of raw materials
Rubber can be divided into two categories: natural rubber and synthetic rubber. Among them, the consumption of natural rubber accounts for 1/3, and the consumption of synthetic rubber accounts for 2/3.
3. According to the physical shape of rubber
Rubber can be divided into hard rubber and soft rubber, raw rubber and mixed rubber.
4. According to the functions and uses of rubber
In addition to natural rubber, synthetic rubber can be divided into general synthetic rubber, semi-general synthetic rubber, synthetic rubber and special synthetic rubber.
5. Press rubber for industrial use
It can be divided into ordinary rubber, heat-resistant rubber, oil-resistant rubber, weather-resistant rubber, special chemical media-resistant rubber, etc.
Comparison of Materials of Various Rubber Sealing Rings
The annular cover is composed of one or several parts. It is fixed on one ring or washer of the bearing and contacts another ring or washer or forms a narrow labyrinth gap to prevent lubricating oil from leaking out and foreign objects from intruding. The sealing ring is a rubber ring with a circular cross-section. Because its cross-section is O-shaped, it is called an O-shaped sealing ring. It is the most widely used type of hydraulic and pneumatic transmission systems. Now let’s follow Linde Polymer to learn about the comparison of various rubber sealing ring materials.
1. NBR sealing ring
Suitable for use in petroleum hydraulic oil, glycol hydraulic oil, diester lubricating oil, gasoline, water, silicone grease, silicone oil and other media. It is currently the most widely used and low-cost rubber seal. Not suitable for use in polar solvents such as ketones, ozone, nitrohydrocarbons, MEK and chloroform. The general operating temperature range is -40~120 ℃.
2. HNBR sealing ring
It has good corrosion resistance, tear resistance and compression deformation resistance, and has good ozone resistance, sunlight resistance and weather resistance. Better wear resistance than nitrile rubber. It is suitable for washing machinery, automobile engine systems and refrigeration systems using new environmentally friendly refrigerant R134a. Not recommended for use in alcohols, esters or aromatic solutions. The general operating temperature range is -40~150 ℃.
3. SIL sealing ring
It has better heat resistance, cold resistance, ozone resistance and atmospheric aging resistance. Has very good insulation properties. However, its tensile strength is worse than that of ordinary rubber and it is not oil-resistant. Suitable for household appliances such as electric water heaters, electric irons, microwave ovens, etc. It is also suitable for various items that come into contact with the human body, such as kettles, drinking fountains, etc. Not recommended for use in most concentrated solvents, oils, concentrated acids and sodium hydroxide. The general operating temperature range is -55~250 ℃.
4. VITON sealing ring
The high temperature resistance is better than that of silicone rubber, and it has better weather resistance, ozone resistance and chemical resistance, but poor cold resistance. It is resistant to most oils and solvents, especially acids, aliphatic hydrocarbons, aromatic hydrocarbons, and animal and vegetable oils. Suitable for sealing needs of diesel engines, fuel systems and chemical plants. Not recommended for use with ketones, low molecular weight esters and nitrate-containing mixtures. The general operating temperature range is -20~250 ℃.
5. FVMQ sealing ring
Its performance combines the advantages of fluorine rubber and silicone rubber, and has good oil resistance, solvent resistance, fuel oil resistance and high and low temperature resistance. Can resist the erosion of oxygen-containing compounds, aromatic hydrocarbon-containing solvents and chlorine-containing solvents. Generally used for aviation and aerospace purposes. Exposure to ketones and brake fluid is not recommended. The general operating temperature range is -50~200 ℃.
6. EPDM sealing ring
Has good weather resistance, ozone resistance, water resistance and chemical resistance. It can be used for alcohols and ketones, and can also be used for sealing in high-temperature water vapor environments. Suitable for bathroom equipment, car radiators and car braking systems. Not recommended for food use or exposure to mineral oils. The general operating temperature range is -55~150 ℃.
7. CR sealing ring
Excellent resistance to sunlight and weather. It is not afraid of refrigerants such as dichlorodifluoromethane and ammonia, and is resistant to dilute acids and silicone grease lubricants. However, it expands greatly in mineral oil with a low aniline point. It is easy to crystallize and harden at low temperatures. It is suitable for various environments exposed to the atmosphere, sunlight, and ozone and for various flame-resistant and chemical corrosion-resistant sealing links. Not recommended for use with strong acids, nitrohydrocarbons, esters, chloroform and ketone chemicals. The general operating temperature range is -55~120 ℃.
8. IIR sealing ring
It has particularly good air tightness, good heat resistance, sunlight resistance, ozone resistance, and good insulation performance; it has good resistance to polar solvents such as alcohols, ketones, esters, etc., and can be exposed to animal and vegetable oils or oxidizable materials. Suitable for chemical resistance or vacuum equipment. It is not recommended to use it with petroleum solvents, kerosene or aromatic hydrocarbons. The general operating temperature range is -50~110 ℃.
9. ACM sealing ring
It has good resistance to oil, good high temperature resistance and weather resistance, but has slightly poor mechanical strength, compression deformation rate and water resistance. Generally used in automobile transmission systems and power steering systems. Not suitable for use in hot water, brake fluid, or phosphate esters. The general operating temperature range is -25~170 ℃.
10. NR sealing ring
Rubber products have good wear resistance, elasticity, tear strength and elongation. However, it is easy to age in the air, becomes sticky when exposed to heat, easily expands and dissolves in mineral oil or gasoline, and is resistant to alkali but not strong acid. Suitable for use in liquids containing hydroxyl ions such as automobile brake oil and ethanol. The general operating temperature range is -20~100 ℃.
11. PU sealing ring
The mechanical properties of polyurethane rubber are very good, and its wear resistance and high pressure resistance are far superior to other rubbers. Aging resistance, ozone resistance, and oil resistance are also quite good, but it is prone to hydrolysis at high temperatures. Generally used in high-pressure and wear-resistant sealing links, such as hydraulic cylinders. The general operating temperature range is -45~90 ℃.
12. Metal rubber sealing ring
Made of stainless steel wire, does not contain any rubber components and has strong usage characteristics. For example: maintaining normal operation in environments such as high vacuum, high and low temperatures, strong radiation, and various corrosion environments. The skin of the sealing ring is made of different materials such as stainless steel, copper, polytetrafluoroethylene and other materials according to different uses. The covered metal rubber component serves as the lining core, which has the advantages of high sealing strength, good effect, and reusability. The sealing ring lining core is made of different metal wire diameters and densities, and is suitable for different pressure situations. The general usage range is -80~800℃. This kind of sealing ring is relatively expensive due to its high cost. However, its good performance and wide range of use environments have been unanimously recognized by people.
Material Application
(1) NBR sealing ring: suitable for use in petroleum-based hydraulic oil, glycol-based hydraulic oil, diester-based lubricating oil, gasoline, water, silicone grease, silicone oil and other media. It is the most versatile and low-cost rubber seal.
(2) HNBR sealing ring: It has excellent corrosion resistance, tear resistance and compression deformation resistance, and has good ozone resistance, sunlight resistance and weather resistance. Better wear resistance than nitrile rubber. It is suitable for washing machinery, automobile engine systems and refrigeration systems using new environmentally friendly refrigerant R134a.
(3) SIL sealing ring: It has excellent heat resistance, cold resistance, ozone resistance and atmospheric aging resistance. Has very good insulation properties. However, its tensile strength is worse than that of ordinary rubber and it is not oil-resistant. Suitable for household appliances such as electric water heaters, electric irons, microwave ovens, etc. It is also suitable for various items that come into contact with the human body, such as kettles, drinking fountains, etc.
(4) VITON sealing ring: The high temperature resistance is better than that of silicone rubber, and it has good weather resistance, ozone resistance and chemical resistance, but poor cold resistance. It is resistant to most oils and solvents, especially acids, aliphatic hydrocarbons, aromatic hydrocarbons, and animal and vegetable oils. Suitable for sealing needs of diesel engines, fuel systems and chemical plants. Not recommended for use with ketones, low molecular weight esters and nitrate-containing mixtures.
Things to Note When Choosing Sealing Ring Material
The main function of the sealing ring is to seal. There are also many media that it seals, mainly oil. It plays the role of dust and oil isolation in applications. The performance of the sealing ring directly affects the performance of other equipment. Good or bad, the first thing that determines the performance of a sealing ring is its material. So how to choose the material of the sealing ring? Some relevant factors are listed below.
1. Mechanical movement speed. The materials of seals have different adaptability to the speed of mechanical movement. Some ordinary materials cannot adapt to high-speed mechanical operation. Therefore, when selecting the material of the seal ring, you must choose one with better quality so that high-speed seals can be used.
2. Pressure. The material of the sealing ring is also very sensitive to the working pressure. Different materials have different pressures they can withstand. If the medium is oil, the pressure it will bear will be smaller. If the pressure it bears exceeds the material If the bearing range of the sealing ring is exceeded, the service life of the sealing ring will be reduced. You can choose this based on the recommendations of the sealing ring manufacturer.
3. Media compatibility. This plays a very important role in the selection of sealing ring materials. Some sealing ring materials will be in direct contact with the medium. If the compatibility between the two is not good, it will inevitably cause damage to the sealing ring or contaminate the medium. In addition, the material of the sealing ring cannot be corroded by introduction, nor can it chemically react with the medium. This is something Linde Polymer specially reminds everyone.
When choosing the material of the sealing ring, in addition to paying attention to the movement speed, pressure, and medium compatibility, you must also pay attention to the temperature. Temperature also has a certain impact on the material of the sealing ring. If the temperature is too high or too low, it will not work. If it is too high, the stretch and hardness of the sealing ring will be reduced. If the temperature is too low, the sealing ring will become very thin. crisp. Each sealing ring material has its own suitable temperature range, which should also be paid attention to. Therefore, when choosing the material of the sealing ring, you must consider it comprehensively and choose the sealing ring that suits you.
Classification and Functions
1. According to categories
■ O-ring series
O-type sealing rings are made of fluorine rubber, nitrile rubber, silicone, ethylene propylene rubber, bis-fluorine rubber and other materials. They are widely used in various machinery and are resistant to various petroleum-based oils and various chemical media: use non-glue It can meet the temperature range of -60℃-+200℃ (bifluoroelastomer FFKM can reach more than 300 degrees after a specific vulcanization method). The operating pressure range: <10MPa (hydraulic), <1MPa (pneumatic) <16MPa (static seal ) of nitrile rubber and gasoline-resistant components (90, 93, 97) have an expansion rate of 0.
■ Y-type sealing ring series
The Y-shaped sealing ring series is made of fluorine rubber, nitrile rubber, chlorine rubber and other materials, and is widely used in hydraulic, mechanical, pneumatic and other industries. The resistant petroleum-based oil has good wear resistance, and different rubber types can be used to meet the temperature range of -60℃-+200℃.
■ V-shaped sealing ring
The V-shaped sealing ring is an axially acting elastic rubber sealing ring used as a pressureless seal on the rotating shaft. The sealing lip has good mobility and adaptability, can compensate for large tolerances and angle deviations, prevent internal grease or oil from leaking outward, and can also prevent the intrusion of external splashing water or dust.
■ YX type sealing ring for hole
YX type sealing ring for holes is used for sealing the piston in the reciprocating hydraulic cylinder. Scope of application: TPU: general hydraulic cylinders, general equipment hydraulic cylinders. CPU: Hydraulic cylinders for engineering machinery and oil cylinders for high temperature and high pressure. Material: polyurethane RPU, CPU, rubber Product hardness: HS85±2°A Working temperature: TPU: -40～+80℃CPU: -40～+120℃ Working pressure: ≤32Mpa Working medium: hydraulic oil, emulsion.
2. According to material
■ Silicone rubber series
The silicone rubber series is equipped with advanced testing equipment and a clean and dust-free workshop. Products are widely used in electronics, medical equipment, food and other industries. The rubber types are selected from a variety of domestic and imported silica gels, and the operating temperature can meet the requirements of -60~+200°C. The products can meet the requirements of oil resistance, steam resistance, medical and edible fully transparent, high strength, flame retardant, conductive silicone rubber, etc.
■ Fluorine rubber series products
Fluorine rubber series products are widely used in automobiles, shipbuilding, electronic appliances and other industries. The working temperature is -40℃~+200℃. They are resistant to fuel oil, high temperature, Freon, superheated water, steam and excellent chemical corrosion resistance.
■ PTFE series products
PTFE has high temperature resistance and corrosion resistance. It does not interact with concentrated acids, alkalis or strong oxidants at high temperatures. It has been widely used as a sealing material and is suitable for pipes, flanges, reactors, Sealing devices on valves and containers. Special-shaped parts are produced according to user design drawings.
■ Various special-shaped miscellaneous parts
The materials are made of nitrile, natural, fluorine rubber, silicone, etc., which are widely used in automobiles, machinery, valves and other industries. Different rubber types can be used to meet the temperature range of -50℃~+200℃. The product has good wear resistance and flexibility, and can be manufactured and designed according to needs.
■ Metal rubber sealing ring
The material is metal rubber, which is a homogeneous elastic porous material. It not only has the elasticity of rubber, but also has the excellent characteristics of metal and can work at temperatures of -150~800°C. At the same time, it can also bear pressure and has the dual functions of pressure bearing and sealing within a certain range. Its purpose:
(1) Fiberglass pipes; FRP sand-filled pipes; FRP jacking pipes; cable protection pipes; flue gas desulfurization pipes; coal mine gas drainage pipes; power plant desulfurization and dust removal pipes.
(2) Municipal water supply and drainage pipeline sealing.
(3) Sealing of various process pipelines (petroleum, chemical industry, metallurgy, papermaking, sewage, seawater desalination, food brewing and beverage processing, medicine, etc.).
(4) Sealing of sewage collection and transportation pipelines and gray water pipelines.
(5) Sealing of drinking water transportation trunk pipes and water distribution pipes.
(6) Oilfield water injection pipe sealing.
(7) Sealing of hot water delivery pipes and hot spring water delivery pipes.
Performance Characteristics of Sealing Rings
(1) Elastic and resilient.
(2) Appropriate mechanical strength, including expansion strength, elongation and tear resistance, etc.
(3) Stable performance, not easy to swell in the medium, and small thermal shrinkage effect (Joule effect).
(4) Easy to process and shape, and can maintain precise dimensions.
(5) Does not corrode the contact surface, does not pollute the medium, etc.
The most suitable and commonly used material that meets the above requirements is rubber, so most sealing rings are made of rubber materials. There are many varieties of rubber, and new rubber varieties are constantly emerging. When designing and selecting, you should understand the characteristics of various rubbers and make reasonable choices. The scope of use of sealing rings includes hardware and plastics, water supply and drainage, HVAC, fire protection, ships, and other piping systems, automobiles, motorcycles, various machinery, household appliances, electronics, toys, sports equipment, pneumatic components and sanitary ware, etc. Rubber sealing ring: It has good heat resistance, cold resistance, ozone resistance and atmospheric aging resistance. However, its tensile strength is worse than that of ordinary rubber and it is not oil-resistant. It is suitable for household appliances such as electric water heaters, electric irons, microwave ovens, and various items that come into contact with the human body, such as kettles, water dispensers, etc.
Advantages
Rubber sealing rings are a very common thing in life. We can see them in many products and have good applications in many industries. So what are its advantages?
1. There are many raw materials that can be used. Basically all vulcanized rubbers that can be thought of at present can be used to make O-rings, such as common nitrile rubber, fluorine rubber, and silicone. Uncommon ethylene-propylene rubber, butyl rubber, etc. can be used to make O-rings.
2. Suitable for various sealing methods: static sealing, dynamic sealing
3. Integrate a large number of substances, do not react to many substances, only react to a few substances, do not pollute the transmission method, and are suitable for most oil, water, gas and chemical substances.
4. Suitable for various purpose materials, specifications and pipe trenches have been standardized, and are highly interchangeable.
5. The O-ring seal uses this movement method, which can be used not only in the turntable type but also in radial repetitive movements and combined movements.
6. The positional friction of the O-ring is very small, so it can be used in many hydraulic cylinders to have a sealing function.
7. The structure is simple and compact, easy to install and operate, and has good ductility. It has excellent effect in extrusion sealing and has the characteristics of self-sealing.
8. O-type sealing rings are cheap because they are made of a lot of materials and the production process is lower than other gender-type sealing products, so they are low-cost.
Reasons for The Aging of Rubber Seals
When some friends used rubber seals, they encountered cracks, hardening, etc. of the seals. What caused this? The aging of rubber sealing rings will cause some sealing rings to lose their sealing effect. Now let’s take a look at the reasons for the aging of rubber sealing rings.
Since rubber sealing rings are made of rubber material, during the production process of rubber sealing rings, the physical and chemical properties and mechanical properties of rubber gradually deteriorate due to the combined effects of internal and external factors, resulting in a loss of use value. The change is called rubber aging. Now we tell you that the surface will appear as cracks, stickiness, hardening, softening, powdering, discoloration, mold growth, etc. So, what are the specific factors?
A. Heat: The increase in temperature causes the rubber material of the sealing ring to crack, causing an oxidation reaction and accelerating the rubber oxidation reaction rate.
B. Light: The shorter the light wave, the greater the energy. It is ultraviolet rays with higher energy that cause damage to rubber sealing rings. In addition to directly causing the breakage and cross-linking of rubber molecular chains, ultraviolet rays can also produce free radicals due to the absorption of light energy in the rubber of rubber sealing rings, initiating and accelerating the oxidation chain reaction process.
C. Oxygen: Oxygen reacts with rubber molecules in the rubber by free radical chain reactions, and the molecular chains break or are over-cross-linked, causing changes in the performance of the rubber sealing ring. Oxidation is one of the important causes of rubber aging.
D. Ozone: The chemically active oxygen of ozone is much higher and more destructive. It also breaks the molecular chain, but the effect of ozone on rubber varies depending on whether the rubber sealing ring is deformed or not.
E. Moisture: Rubber seals are easily damaged when exposed to rain or soaked in water in humid air. This is because the water-soluble substances and water-soluble substances in the rubber are extracted and dissolved by water.
F. Mechanical stress: Under the repeated action of mechanical stress, the molecular chain of the rubber sealing ring will break to generate free water, triggering an oxidative chain reaction, and easily causing ozone cracking under the action of stress.
Causes of Seal Leakage
1. The sealing medium swells the rubber and reduces the hardness of the rubber, thereby causing premature aging and wear of the oil seal.
2. Comprehensive aging, rubber elastomer and sealing medium both age.
3. Due to too harsh working conditions, material cracks are caused, especially cracks on the sealing edge of the oil seal.
4. The sealing lip of the oil seal no longer follows the vibration of the shaft surface and the beating of the shaft.
5. Irregular assembly process causes damage to the shaft surface contact surface, causing premature wear of the sealing lip.
6. Contaminants are permanently embedded on the sealing edge from the inside and outside of the seal, causing premature wear of the shaft surface and sealing lip.
7. Corrosion from the shaft to the sealing lip area will leave long-term hidden troubles in the sealing performance of the sealing system.
8. “Oil carbon” dirt forms on the sealing lip, causing the sealing lip of the oil seal to be lifted up, causing leakage failure of the sealing system.
9. Due to the dimensional tolerance not meeting the standard specifications, the static sealing surface where the outer edge of the oil seal matches the cavity is deformed.
10. Due to the harsh working conditions and the incompatibility between the rubber elastomer and the working medium, the rubber hardness increases, or the hardness of the elastomer is too high.
Repair and Maintenance of Sealing Rings
■ Routine maintenance of rubber seals
1. Regular cleaning: The rubber sealing ring needs to be kept clean, especially the gaps where dust is easy to accumulate. It should be cleaned regularly with brushes and other tools. It is generally recommended to clean once a month to prevent surface oxidation and rust caused by dust accumulation, thereby extending its service life.
2. Regular lubrication: Rubber sealing rings need to be lubricated regularly with lubricating oil or butter to reduce wear and aging. In particular, the rubber sealing ring used as door and window sealing strips plays a very important role, and regular maintenance can ensure its sealing performance and safety.
3. Avoid forced pulling: Do not pull the rubber sealing ring with force to prevent damage to its sealing performance.
4. Avoid exposure to the sun and rain: Rubber sealing rings should be protected from sunlight as much as possible. Long-term exposure will cause aging, cracking and other phenomena, affecting its sealing performance. At the same time, avoid rain to prevent moisture from entering the sealed part and causing damage.
5. Pay attention to cracks, deformation, etc.: Always pay attention to whether the rubber sealing ring has cracks, deformation, etc. Once found, it should be dealt with in time to prevent it from affecting its sealing performance and appearance.
6. Storage environment: The storage environment of rubber sealing rings should be kept clean, dry, well-ventilated, and avoid moisture and high temperature environments.
7. Purchase reputable products: Try to purchase rubber seals from reputable suppliers to ensure product quality and after-sales service.
In short, the repair and maintenance of rubber sealing rings is very important. Correct maintenance can extend its service life and ensure its sealing performance. Therefore, pay attention to regular cleaning, lubrication and inspection during use to avoid damage and aging.
■How to remove mildew spots on rubber sealing rings
The performance of the sealing ring is stable, there will be no thermal expansion and contraction, and it has good elasticity and resilience. It is used in many industries. However, after using the sealing ring for a long time, mold spots will inevitably appear on it, So How to remove these mildew spots?
1. Use vinegar. When removing mold spots on the sealing ring, you can use daily vinegar. During cleaning, not only the moldy sealing rings can be cleaned, but also the inside of the mechanical equipment can be cleaned, which can not only remove mold spots, but also disinfect and sterilize, making the equipment safer to use than before. , this is also a method specially recommended to everyone by the sealing ring manufacturers.
2. Use toothpaste. Toothpaste can also clean the moldy spots on the sealing ring. First apply the toothpaste on the moldy area of the sealing ring, wait for a few minutes, and then use a soft rag or towel to wipe it gently. This way, you don’t need to use too much force, which is easier. This causes the sealing ring to deform, causing the seal to become loose. After wiping is completed, just rinse it with clean water.
3. Use bleaching powder. You can use diluted bleach to remove mildew on the seal. When using it, dilute the bleaching powder according to the proportion required in the instructions, and then wipe it clean with a towel or rag. In this way, after the wiping is completed, the sealing ring will become white and bright, and there will be no odor.
Precautions When Replacing Seal Rings
The sealing ring has excellent functions, including wear resistance, corrosion resistance, acid and alkali resistance and earthquake resistance. However, we also need to replace it regularly. If the sealing ring is not replaced for a long time, the effect will be greatly reduced. Then we will replace it. What should I pay attention to when sealing the ring?
1. If wear and tear occurs during the use of the sealing ring, regular inspection and analysis should be carried out, and corresponding solutions should be formulated immediately. If necessary, professionals from the sealing ring manufacturer can be asked to solve the problem.
2. If the sealing ring is severely worn and can no longer be used, it must be replaced in time. Before replacement, the new sealing ring needs to be inspected and calibrated, and it needs to be in place. On the side of the worktable, a groove with a certain depth and spacing is processed.
3. When installing a new sealing ring, embed it in the groove, pay attention to the position of the clamping joint, and make the connection firm.
4. After installing the new sealing ring, clean the burrs on the edge of the groove immediately and tighten the sealing ring to avoid any abnormality. Especially when lifting, there is no need to cause the sealing ring to come out of the groove, otherwise it will have to be reinstalled.
5. When using the replaced sealing ring, it should be inspected regularly to see if there is any leakage. Usually when the conical jaw plate is replaced, the sealing ring also needs to be replaced.
6. If used according to routine, a sealing ring usually needs to be replaced every year, so be fully prepared for this.
Precautions for Installing Sealing Rings
The installation of the sealing ring is very important. Whether it can be sealed well is inseparable from our installation. Linde Polymer will share with you the precautions for installing the sealing ring for your reference.
1. When dismantling, use appropriate tools to remove the old sealing ring to prevent scratching the grooves of the components. Check the old O-ring for cuts, wear, deformation, falling pieces or surface defects, and remove the old O-ring. The sealing ring is cut off and scrapped, and the old seal cannot be reused.
2. When disassembling and assembling, use cork and plastic tools with blunt ends and blunt edges to avoid scratching the installation surface.
3. When installing the seal, remove it from the package to prevent premature removal from contaminating the seal ring.
4. Before installation, check to confirm that the surface of the new O-ring seal is smooth without indentation, distortion, and intact. There should be no scratches, nicks, cuts, etc., and use corresponding oil for lubrication.
5. Apply a thin layer of grease to the surface that has sliding friction during installation.
6. After installation, confirm that the seal is not distorted. After it is installed in place, rotate the new seal ring several times to release the residual torque, and perform a pressure test on the relevant components to ensure there is no leakage.
Summarize
Rubber sealing ring is an elastic sealing material widely used in various equipment and systems, with excellent performance characteristics and application fields. It has the characteristics of high elasticity, close fit to the surface, effective sealing performance, excellent mechanical strength and wear resistance, good electrical insulation performance and chemical corrosion resistance, and is suitable for a variety of different working environments and conditions.
In order to ensure that the rubber sealing ring can work stably for a long time, correct repair and maintenance are required. Regular cleaning, lubrication and inspection are essential tasks in the maintenance process. At the same time, attention should be paid to avoid forced pulling, sun and rain and other adverse conditions. During storage and use, attention should also be paid to maintaining a clean, dry, and well-ventilated environment to avoid the effects of moisture and high temperature.
In short, rubber sealing ring is an elastic material with various performance characteristics and applications. Its material selection, shape and size, temperature resistance, pressure resistance, corrosion resistance and other characteristics all depend on the specific application scenarios and requirements. When selecting and using rubber seals, comprehensive consideration and analysis need to be carried out based on the actual situation.
