NOK Original Seal from WONEPART,NOK seals are important mechanical parts that prevent the lubricant, water, liquid chemicals and gases on the machine from leaking out of the gap, and at the same time prevent sand and dust from entering from the outside.

Fluorosilicone rubber is a kind of hot-vulcanized special silicone rubber. Because its matrix polymer is silicone rubber containing trifluoropropyl group, it combines the advantages of silicone rubber and fluorine rubber: that is, it has good low temperature performance and insulation of silicone rubber. Performance, high temperature performance, easy processing and weather resistance, but also has low permeability, flame retardancy, good physical and mechanical properties and chemical stability similar to fluororubber, such as solvent resistance, oil resistance, oil and gas resistance, and suitable for various It is widely used in the fields of aviation industry, petroleum industry, automobile industry, chemical industry, etc. because of the harsh high and low temperature resistance fuel and lubricant resistance occasions. As a kind of sealing protection products, fluorosilicone rubber is suitable for use in aerospace, automobile, electromechanical, electronic, machinery and construction fields. It can be used in kerosene and steam at -55℃～220℃ and open flame at 150℃. And continue to use in harsh environments such as stress, temperature resistance, oil resistance, and ozone resistance when the strength is greater than 100KG. Below, the characteristics of our fluorosilicone rubber are introduced in detail.Fluorosilicone rubber is a kind of hot-vulcanized special silicone rubber. Because its matrix polymer is silicone rubber containing trifluoropropyl group, it combines the advantages of silicone rubber and fluorine rubber: that is, it has good low temperature performance and insulation of silicone rubber. Performance, high temperature performance, easy processing and weather resistance, but also has low permeability, flame retardancy, good physical and mechanical properties and chemical stability similar to fluororubber, such as solvent resistance, oil resistance, oil and gas resistance, and suitable for various It is widely used in the fields of aviation industry, petroleum industry, automobile industry, chemical industry, etc. because of the harsh high and low temperature resistance fuel and lubricant resistance occasions. As a kind of sealing protection products, fluorosilicone rubber is suitable for use in aerospace, automobile, electromechanical, electronic, machinery and construction fields. It can be used in kerosene and steam at -55℃～220℃ and open flame at 150℃. And continue to use in harsh environments such as stress, temperature resistance, oil resistance, and ozone resistance when the strength is greater than 100KG. Below, the characteristics of our fluorosilicone rubber are introduced in detail. Important characteristics of fluorosilicone rubber 1. Weather resistance, oil resistance, solvent resistance, and chemical resistance The main chain of fluorosilicone rubber is a Si-O bond structure, which is a saturated chain, so it has excellent air aging resistance. Its rubber test piece can still maintain good elasticity after five years of outdoor exposure test; after up to 10 years, Under ultraviolet light and harsh weather conditions, its physical properties have only minor changes. The tensile strength and elongation at break of samples placed in different locations have decreased by less than 25%. Compared with methyl vinyl silicone rubber, fluorosilicone rubber has excellent oil resistance, solvent resistance, and chemical resistance; even when compared with fluororubber, it has good oil and solvent resistance. After immersing in the same medium, temperature and time, it shows excellent durability. Fluorosilicone rubber has better resistance to methanol-containing gasoline. Even in a gasoline/methanol mixture, the hardness, tensile strength, and volume change of the vulcanized rubber are very small. After a long-term immersion test for 500 hours, the physical properties are also almost no change at all. 2. Heat resistance Compared with fluororubber, fluorosilicone rubber has excellent heat aging resistance, especially the retention rate of physical properties at high temperature. Compared with silicone rubber, fluorosilicone rubber reduces the heat resistance of fluorosilicone rubber to a certain extent due to the presence of trifluoropropyl group. The reason is that trifluoropropyl group is easily thermally decomposed, and the decomposition produces highly acidic compounds that accelerate fluorine. Thermal aging reaction of silicone rubber. The high temperature decomposition of fluorosilicone rubber is the same as that of silicone rubber, namely: side chain oxidation, main chain rupture, side chain thermal decomposition and various compound reactions. Since the decomposition products can also cause the main chain to break, the heat resistance is usually worse than that of silicone rubber, and it has begun to oxidize and age at a temperature of 200°C. Temperature has greater influence on fluorosilicone rubber than silicone rubber, but less than fluoroelastomer. Foreign countries have also studied the service life of fluorosilicone rubber at 150℃×2000h, 175℃×5000h, and 200℃×4000h. The result is second only to methyl vinyl silicone rubber. 3. Low temperature performance Like ordinary silicone rubber, fluorosilicone rubber has good low temperature performance. Since fluorosilicone rubber is a linear polymer composed of soft Si-O as the main chain, its low temperature characteristics are better than those of fluoroelastomers with C-C as the main chain. First of all, the molecular backbone of fluorosilicone rubber is relatively flexible, giving it excellent cold resistance. Secondly, the molecular chain of fluorosilicone rubber is in a helical configuration. The flexibility of the molecular chain is greater than that of the CC bond or the Si-C bond. The interaction force between the molecular chains is weak. These structural features make it soft and elastic. When it changes, the intermolecular force changes very little, so its various properties, especially elasticity, change little, making it have low-temperature performance that other rubbers can’t match. Third, the presence of trifluoropropyl substituted methyl can destroy the regularity of the polydimethylsiloxane molecular chain, reduce the crystallization temperature and degree of crystallization of the polymer, and make fluorosilicone rubber have a better low temperature than silicone rubber Sex. Therefore, fluorosilicone rubber still has elasticity at a low temperature of -60°C to -70°C, and can be used for a long time at -60°C. 4. Electrical insulation and radiation resistance The electrical performance of fluorosilicone rubber is similar to that of ordinary silicone rubber. Except for high frequency and high voltage electrical environment, its electrical insulation performance can reach the use level. The electrical insulation performance changes little under severe conditions such as high temperature, low temperature, humidity, oil, solvent, chemicals, ozone, etc. The radiation resistance of fluorosilicone rubber is not outstanding, but the radiation aging resistance is better than that of methyl vinyl silicone rubber. 5. Physical and mechanical properties Like ordinary silicone rubber, fluorosilicone rubber has relatively low mechanical strength (especially tear strength). Our company can customize and process fluorine-silicon special-shaped parts, O-rings, gaskets, gaskets, oil seals, etc. according to requirements. After customer experiments, the effect is excellent. Welcome customers in related industries to exchange and consult, and request samples for testing.

O-ring is a sealing element with a circular cross-section. In the mid-nineteenth century, some people used O-rings made of cast iron as the seals for steam engine cylinders. Later, natural rubber was used for faucets. With the development of rubber production, O-rings are currently made of synthetic rubber. Practice has proved that the sealing performance of the O-ring is very good, so it is used in equipment from airplanes to general hydraulic and pneumatic equipment. In this page, we will introduce the function of O ring in did

What is the gap between the oil seal and the mechanical seal? The key function of the sealing ring is to protect the grease, so that the components that must be lubricated in the transmission components and the mechanical energy components protect each other. The mechanical seal refers to the device that processes the sealing relationship between the driving force cardiomyocytes and the arc. The skeleton oil seal is a category typical of the seal ring, which means a commodity. Usually, when talking about the seal ring, these "heavy-weight" skeleton oil seals are always thought of. In short, the skeleton diagram refers to the key construction of the supporting points and determination of the sealing ring, which can improve the actual sealing effect of the sealing ring, so that the sealing ring can maintain the appearance and excellent supporting force. According to the structure of the seal ring, the skeleton oil seal can be divided into a single-lip skeleton oil seal and a lip skeleton oil seal.

Why Wonepart seal there are different types of Seal application in different area?Why Wonepart seal there are different types of Seal application in different area? Leakage is one of the common failures of mechanical equipment. There are two main reasons for leakage: one is the result of mechanical processing, the surface of mechanical products must have various defects and shape and size deviations, therefore, gaps will inevitably occur at the joints of mechanical parts; the other is sealing two If there is a pressure difference on the side, the working medium will leak through the gap. Reducing or eliminating gaps is the main way to prevent leakage. The role of the seal is to seal the gap between the joint surfaces, isolate or cut off the leakage channel, increase the resistance in the leakage channel, or add a small working element in the channel, which will cause pressure on the leakage and partially offset the pressure difference that caused the leakage. Or fully balanced to prevent leakage. Sealing can be divided into two categories: static sealing between relatively static joint surfaces and dynamic sealing between relatively moving joint surfaces. Static seal usually refers to the seal between two static surfaces. There are three main categories of static sealing: gasket sealing, sealant sealing and direct contact sealing. Dynamic seal refers to the seal between relative moving parts in a machine (or equipment). 1 Packing seal Packing seals are mainly used for the dynamic sealing of the moving parts of process machines and equipment in the machinery industry, such as centrifugal pumps, compressors, vacuum pumps, mixers, reactor shaft seals and reciprocating pumps, plungers or piston rods of reciprocating compressors, And to make the seal between the valve stem of the linear and spiral motion valve and the fixed body. The basic form of stuffing box is: (1) Asbestos packing: Both temperature resistance and corrosion resistance are very good, but when used alone, the sealing effect is not good, so it is always impregnated or added with other materials. Oil-impregnated asbestos packing: There are two basic structural forms, one is twisted and the other is braided. It can be divided into round and square. (2) Teflon braided packing: The PTFE tape is braided into packing, which has excellent corrosion resistance and can be used in cryogenic media. (3) Rubber O-ring: In the low pressure state, the sealing effect is good. The use temperature is restricted, such as natural rubber can only be used at 60°C. For O ring you could find details on our web http://www.wonepart.com/product/o-ring, you could find the part that you want. (4) Plastic molding filler: Generally made into three-piece type, but also can be made into other shapes. The plastics used are mostly polytetrafluoroethylene, and nylon 66 and nylon 1010 are also used. (5) Soft packing seal Soft fillers, also known as mud-like fillers, are advanced "packings" made from a new generation of high-performance synthetic fibers with special barrier agents and lubricants. The soft packing has any size and shape, and it is easy to install. It can be injected directly through a special high-pressure gun. It does not need to be pre-cut like a traditional packing, and it can be applied to any size of the packing cavity.

Floating seal from wonepart are commonly used in bulldozer and wheel loader construction machines Floating oil seal is a common name of floating seal, which is a kind of mechanical seal in dynamic seal. It has super sealing performance under harsh working environments such as coal powder, sand, water vapor, etc. It is a compact machine Sealed, mainly used in low speed and heavy load occasions. It has the advantages of automatic compensation after wear, end wear, reliable work, simple structure, etc. It is widely used in coal mine machinery. Such as bulldozer walking mechanism, scraper conveyor head (tail) sprocket assembly, roadheader loading mechanism and cantilever section, continuous shearer left and right cutting drum and reducer, etc. Introduction The planetary reducer with a floating oil seal on the walking part of the construction machinery performs dynamic sealing on the end face of the component. Due to its high reliability, it is also used as a dynamic seal for the output shaft of the bucket wheel of the dredger. This type of seal is a mechanical seal, which is generally composed of a floating ring of iron alloy material and a supporting O-ring seal of nitrile rubber. Floating rings are used in pairs, one rotates with the rotating parts and one is relatively stationary, which is very different from the oil seal ring.

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The factors for seal losing efficacy 1. Design selection is not reasonable (1) The seal is divided into two categories: static seal and dynamic seal according to whether there is relative movement between the two joint faces sealed. The dynamic seal is divided into a rotary dynamic seal and a mobile dynamic seal according to the relative movement direction. In addition, the type of working medium, pressure, temperature and the relative speed of movement between the two pairs of seals have different requirements on the material and structure of the seal. For example, static seals use O-rings, various gaskets, sealants, etc.; rotary seals are used in addition to O-rings, and oil seals are widely used; reciprocating motions generally use O-rings, especially at high speeds. Generally, it is not common used, and lip seals such as a V shape, a Y shape, a Yx shape, a J shape, and the types are generally used.

1. When installing the hydraulic seal, if you do not pay attention to cleaning the installation site, resulting in not being a tight hydraulic seal. The repairmen will remove the burrs on the chamfer of the cylinder seal before installing of the hydraulic seal. This minor detail will greatly reduce the probability of cylinder seal damage.

For construction machine seal it could be used for hydraulic breaker seal kits, excavators seal kits, wheel loader seal kits, backhoe loader seal kits, crane seal kits for the brand of KOMATSU, CATERPILLAR, VOLVO, HITACHI, DOOSAN, JOHN DEER, CASE, HYUNDAI, NPK, XCMG, SANY, and so on. Under normal circumstances, the temperature of the medium exceeds 120 °C is considered to be a high temperature seal. In order to ensure the normal operation of the mechanical seal in high temperature environment, we WONEPART will introduce how to keep the mechanical seal working continuously.