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In the world of centrifugal pumps, the impeller is like the heart, and the differences in its types have a crucial impact on the performance and applications of centrifugal pumps. Today, let's take an in-depth look at the wonderful changes brought about by different impellers in centrifugal pumps.   I. Open Impeller: The Unrestrained Master of Flow Flow Characteristics Centrifugal pumps with open impellers are "giants" in the field of flow. There are no shrouds on either side of its blades, and the liquid flows through it as if on an open road, with minimal restraint. This free-flowing environment enables it to easily handle the demand for large flow rates of liquid transportation. Imagine in the vast farmland irrigation scenario, where clear water is continuously pumped from the water source. Through the centrifugal pump with an open impeller, it's like opening a highway for water, allowing a large amount of water to quickly flow into the fields to satisfy the thirst of crops. In cases where there is an extremely high demand for flow rate and the transported medium is relatively clean and not prone to clogging, the centrifugal pump with an open impeller is undoubtedly the top choice.   Head and Efficiency Characteristics However, everything has two sides. The open impeller is somewhat inferior in terms of head. Due to the relatively dispersed flow of the liquid, when the impeller rotates to transfer energy, it cannot effectively convert the energy into the pressure energy of the liquid as other types of impellers do, so the head is relatively low. Moreover, because there is no restraint from shrouds, more energy is dissipated during the flow of the liquid, and backflow phenomena are likely to occur at the inlet and outlet of the impeller, which makes its efficiency relatively low among several types of impellers. However, in some low-head and large-flow drainage scenarios like temporarily draining rainwater on construction sites, the centrifugal pump with an open impeller can still exert its unique advantages.   Anti-Clogging and Wear Resistance Characteristics When it comes to anti-clogging, the open impeller is a champion. It is like a large inclusive pocket, allowing certain-sized solid particles or impurities to pass through the impeller along with the liquid. This is especially outstanding when transporting liquids containing more impurities, such as river water with sediment or wastewater with fibers. However, this inclusiveness comes at a cost. Solid particles are likely to come into direct contact with the impeller blades, and after long-term operation, the blade wear problem will be quite prominent, and the wear resistance is relatively poor.   II. Semi-Closed Impeller: The Practitioner of the Balance Principle Flow and Head Characteristics The semi-closed impeller has a shroud on one side and none on the other, as if finding a balance point between the open and closed impellers. In terms of flow rate, it is between the two, with a larger flow rate than the closed impeller and a smaller one than the open impeller. Its unique structure makes the flow path of the liquid relatively more regular, which to some extent increases the liquid flow velocity. In terms of head, it also shows a moderate level. In the multi-story building water supply system, when the floor is not particularly high, the centrifugal pump with a semi-closed impeller is like a precise "water transporter", able to provide residents with an appropriate amount of water and water pressure just right to meet the domestic water demand.   Efficiency and Applicable Medium The efficiency of the centrifugal pump with a semi-closed impeller is also between that of the open and closed impellers. The shroud on one side reduces the dissipation of liquid energy, making its running efficiency higher than that of the open impeller. In some simple industrial processes, such as general material transportation systems, it can maintain a certain running efficiency while meeting the requirements of flow rate and head. In terms of applicable medium, it can handle liquids containing a small amount of impurities. For example, in the food processing industry, when transporting fruit juice with a small amount of pulp particles, the centrifugal pump with a semi-closed impeller can ensure a certain flow rate and head without being easily affected by impurities.   III. Closed Impeller: The Elite of Head and Efficiency Head and Efficiency Characteristics The centrifugal pump with a closed impeller is an "excellent student" in both head and efficiency. The design with shrouds on both sides allows the liquid to flow orderly in the flow channels inside the impeller, just like a train running on rails. When the impeller rotates, it can efficiently transfer mechanical energy to the liquid, enabling the liquid to obtain higher pressure energy and thus generate a higher head. In the chemical process, when it is necessary to transport the liquid to a higher position or overcome a large resistance, the centrifugal pump with a closed impeller is like a powerful "power amplifier", playing a crucial role. Meanwhile, this precise flow channel design and good sealing performance result in less energy loss during the flow of the liquid, and the gap between the impeller and the pump shell can also be precisely controlled, further reducing leakage losses and thus ensuring a higher efficiency. In the long-term operation and in large urban water supply systems that are sensitive to energy consumption, the centrifugal pump with a closed impeller, relying on its high-efficiency and energy-saving characteristics, safeguards the urban water supply.   Anti-Clogging, Wear Resistance and Applicable Medium However, the closed impeller also has its "temper". Due to the relatively small and closed flow channels, it is very sensitive to solid particles and is prone to clogging the flow channels. However, its wear resistance is quite good. Under reasonable design conditions, the liquid mainly flows inside the flow channels, and the impeller blades have few opportunities to come into contact with solid particles. Moreover, we can choose wear-resistant materials to make the impeller to further improve its wear resistance. Therefore, it is mainly used to transport pure liquids, such as clear water, various oils, chemical solutions, etc. In the pharmaceutical industry for transporting liquid medicine, in the electronic industry for transporting ultrapure water and other occasions where the purity requirement of the medium is extremely high, the centrifugal pump with a closed impeller is irreplaceable.   In conclusion, centrifugal pumps with different impellers are like craftsmen with different skills, shining brightly in different fields and working conditions. Understanding their characteristics can help us make more informed choices when selecting centrifugal pumps, allowing these "water spirits" to better serve our production and life.

In the field of chemical production, the procurement of chemical centrifugal pumps is a crucial decision. When considering the purchase of chemical centrifugal pumps, many enterprises will turn their attention to small manufacturers, and there are numerous notable advantages behind this.   Ⅰ.Outstanding Cost Performance Small manufacturers possess unique advantages in their cost structure. Compared with large enterprises, their operating costs are lower, without complex hierarchical management frameworks and large-scale marketing expenses. This enables them to provide customers with more affordable chemical centrifugal pumps while ensuring a certain profit margin. For enterprises with limited budgets, purchasing from small manufacturers can effectively reduce procurement costs and achieve higher capital utilization efficiency. Moreover, small manufacturers are often more willing to negotiate prices with customers. Since the scale of orders has a relatively significant impact on them, they will actively communicate with purchasers when facing reasonable price requests, striving to reach cooperation, which makes it possible for purchasers to obtain more favorable prices.   Ⅱ.Strong Customization Capability The technological processes in chemical production are diverse, and the requirements for chemical centrifugal pumps also vary greatly. The flexibility of small manufacturers demonstrates great value in such situations. Their production arrangements are not as restricted by large-scale production as those of large manufacturers, and they can easily adjust production processes and procedures. If purchasers have requirements for special materials, unique size specifications, or specific performance parameters of centrifugal pumps, small manufacturers can respond promptly and carry out customized production. During the entire customization process, the simple internal communication chain of small manufacturers ensures the efficient and accurate transmission of information. Purchasers can directly communicate with technicians and production managers to quickly feed back changes in requirements, ensuring that the customized chemical centrifugal pumps can perfectly adapt to the production environment.   Ⅲ.Unique Professionalism Many small manufacturers focus on the specific segment of chemical centrifugal pumps.Long-term in-depth cultivation has enabled them to accumulate profound professional knowledge in technical aspects. They concentrate their limited resources on the research development and production of specific types of chemical centrifugal pumps, and their understanding and mastery of the products often exceed those of some large comprehensive enterprises. This professionalism is reflected in the control of performance details of chemical centrifugal pumps. Whether it is the flow rate, head, efficiency of the pump, or special properties such as corrosion resistance and wear resistance, they have conducted in-depth research. During the selection stage, small manufacturers can provide precise suggestions to purchasers based on their professional knowledge, helping purchasers choose the most suitable centrifugal pumps for their own chemical processes, and avoiding subsequent usage problems caused by improper selection. Ⅳ.Obvious Advantages in Delivery Time In chemical production projects, time is money. Small manufacturers have unique advantages in terms of delivery time. Due to their relatively small production scale, it is more convenient to adjust production plans. When purchasers have urgent order requirements, small manufacturers can quickly arrange production to prioritize meeting the time requirements of customers. Meanwhile, some small manufacturers will reserve a certain amount of inventory according to common market demands. For some commonly used models of chemical centrifugal pumps, purchasers can quickly pick up the goods after placing orders, greatly shortening the waiting time and facilitating the smooth progress of chemical projects.   Ⅴ.Thoughtful After-sales Service Small manufacturers are well aware of the importance of customers to their own development, so they often spare no effort in after-sales service. When customers encounter problems during the use of chemical centrifugal pumps, small manufacturers can respond quickly. They do not have cumbersome after-sales procedures, and technicians can quickly get in touch with customers to understand the problems and provide solutions. Moreover, the after-sales service of small manufacturers is more personalized. They can provide on-site installation guidance, equipment debugging, regular maintenance, and other comprehensive services according to the actual situation of customers. This thoughtful after-sales service not only can ensure the normal operation of chemical centrifugal pumps and extend the service life of equipment, but also can make purchasers feel meticulous care, laying a good foundation for long-term cooperation. In conclusion, when purchasing chemical centrifugal pumps in China, small manufacturers, with their characteristics in terms of price advantages, customization capabilities, professionalism, advantages in delivery time and after-sales service, have become a high-quality procurement option that cannot be ignored, providing strong support for the stable production and development of chemical enterprises.   Ⅵ.Manufacturer Recommendation At Anhui Changyu Pump and Valve Co., Ltd., our pumps are offered at favorable prices while maintaining excellent quality. We can customize special materials, unique size specifications or specific performance parameters of centrifugal pumps according to the specific requirements of buyers. Moreover, our company has been deeply engaged in the production of chemical centrifugal pumps for more than 20 years. This professionalism is reflected in the control of performance details of chemical centrifugal pumps. Whether it is the flow rate, head, efficiency of the pump, or special properties such as corrosion resistance and wear resistance, we have conducted in-depth research. When there is an urgent order requirement, our company can quickly arrange production to prioritize meeting the customers' time requirements. When customers encounter problems during the use of chemical centrifugal pumps, our company can respond quickly. We don't have cumbersome. 

Magnetic pumps play an important role in industrial production. To ensure their stable and efficient operation, daily maintenance work needs to be carried out from multiple aspects.   Monitoring of Operating Parameters (1) Flow Monitoring   Flow is a key parameter for measuring the working efficiency of magnetic drive pumps. A flowmeter is used to measure and record the flow of the pump regularly. If there are abnormal changes in the flow, the cause needs to be investigated in a timely manner. For example, if the flow gradually decreases, it may be due to the accumulation of impurities in the impeller from the conveyed medium, affecting the normal delivery of the liquid. At this time, the impeller should be cleaned or the filter at the inlet should be checked for blockage. If there is a sudden drop in flow, it may be that the magnetic coupling has failed, affecting the rotational speed of the impeller, and the coupling needs to be inspected and repaired.   (2) Pressure Inspection   Pay close attention to the magnetic drive pumps's inlet and outlet pressures. High outlet pressure may be due to blockage of the outlet pipeline, such as scale build-up or accumulation of foreign objects in the pipeline. The pipeline should be cleaned in a timely manner. Low outlet pressure may be due to damage to the impeller, poor sealing, or internal leakage. Low inlet pressure may cause cavitation, and the tightness of the inlet pipeline and the patency of the filter need to be checked. Timely detection of problems through pressure changes can effectively avoid further damage to the equipment.   (3) Temperature Monitoring   Regularly detect the temperatures of the magnetic drive pump body, isolation sleeve, and motor. An abnormal increase in the pump body temperature may be due to bearing wear, insufficient lubrication, or increased friction between the impeller and the pump casing. An excessively high temperature of the isolation sleeve may be due to increased friction between the internal magnetic rotor and the isolation sleeve or a failure of the cooling system. An excessively high motor temperature may be due to overload, poor heat dissipation, or an electrical fault. When the temperature exceeds the normal range, the machine must be stopped for inspection to prevent component damage.   Visual Inspection (1) Leakage Inspection   Leakage inspection of magnetic drive pump is of crucial importance. Check the pump body, pipeline connection parts, and possible shaft seal locations. If leakage is found, in the sealing gasket, it may be that the gasket is aged or damaged and needs to be replaced in a timely manner. If there are cracks in the pump body causing leakage, minor cracks can be repaired, while severe ones require consideration of replacing the pump body.   (2) Inspection of Component Condition   Check the integrity of components such as the pump body, impeller, and coupling. The pump body should show no signs of deformation or corrosion. If there is corrosion, corresponding anti-corrosion measures can be taken or replacement can be carried out according to the degree of corrosion. The blades of the impeller should not be worn or broken, otherwise, the performance of the pump will be reduced. The coupling should be checked for looseness and wear to ensure a tight connection and good alignment. If there are problems, adjustments or replacements should be made in a timely manner.   Lubrication Maintenance (1) Lubricating Oil Management   The lubricating oil in the bearing box has a great impact on the normal operation of the magnetic pump. Regularly check the oil level to ensure that it is within the range specified by the oil gauge. If it is too low, the bearings will not be lubricated adequately, and if it is too high, overheating and oil leakage may occur. At the same time, observe the oil quality. If the oil color turns black, there are impurities, or emulsification occurs, the lubricating oil should be replaced in a timely manner. Generally, it is replaced every 1,000 - 2,000 hours of operation. When replacing, the bearing box should be thoroughly cleaned.   (2) Grease Replenishment (if applicable)   For parts lubricated with grease, regularly check the remaining amount of grease. When the grease is insufficient, replenish it according to the regulations, taking care to avoid mixing in impurities to ensure the lubrication effect.   Maintenance of Key Components (1) Maintenance of Magnetic Coupling   The magnetic coupling is the core component of the magnetic pump. Regularly check its magnetic strength and coupling condition. This can be judged by observing the operating state of the pump, such as whether the rotational speed is stable and whether there are abnormal vibrations. If a decrease in magnetic strength or decoupling phenomenon is found, it may be that the magnets are damaged or aged, the magnetic coupling components need to be replaced, and the installation gap should be ensured to be correct.   (2) Inspection of Isolation Sleeve   The condition of the isolation sleeve is directly related to the safety of the magnetic pump. Check whether the isolation sleeve is worn, corroded, or cracked. Slight wear can be observed for the time being, but if the wear is severe or there are cracks, it must be replaced immediately to prevent the medium from leaking into the magnetic drive part. Cleaning and Environmental Maintenance (1) Pump Body Cleaning   Keep the surface of the pump body clean. Regularly wipe it with a clean cloth to remove dust, oil, and other substances to prevent impurities from entering the pump and affecting its operation.   (2) Environmental Maintenance   Keep the operating environment of the magnetic pump dry and well-ventilated, and avoid dampness, corrosive gases, etc. from causing damage to the pump body and electrical components.   Electrical System Maintenance (1) Motor Inspection   Check whether the motor wiring is firm and the insulation is good. Regularly measure the insulation resistance of the motor to prevent electric leakage. At the same time, check the heat dissipation situation of the motor to ensure its normal heat dissipation.   (2) Circuit Inspection   Check the start-stop control circuit and protection devices of the magnetic pump to ensure that the control elements work normally and the protection devices function properly to ensure the safe operation of the magnetic pump.   Through the above comprehensive daily maintenance measures, the performance and service life of the magnetic pump can be effectively guaranteed, providing strong support for the stable progress of industrial production. Changyupump is a professional industrial chemical pump manufacturer, get more products from us quickly! Email:jade@changyupump.com  

Chemical Industry: Transporting corrosive liquids: It can be used to transport strong acids such as hydrochloric acid, sulfuric acid, and nitric acid, as well as strong alkali solutions like sodium hydroxide. In the production process of various chemical fertilizers, fluorides, etc. in chemical production, magnetic pumps are also often used to transport relevant media. At this time, chemical-resistant magnetic pumps are required. Transporting flammable and explosive liquids: Such as gasoline, methanol, toluene, and other organic solvents. Magnetic pumps have no mechanical seal and will not generate friction sparks, which can ensure the safety of the transportation process and reduce the risk of fire and explosion accidents. At this time, organic solvent transfer magnetic pumps are needed. Participating in chemical reactions: In some chemical reactions that require the cyclic transportation of reaction liquids, magnetic pumps can stably provide power to ensure the smooth progress of the reaction, for example, in the cyclic process of gas-absorbing reaction liquid. At this time, stainless steel chemical process magnetic pumps are needed. Pharmaceutical Industry: Liquid medicine transportation: It is used to transport various liquid medicines, slurries, biological drugs, etc. Its leak-free and pollution-free characteristics can ensure the purity and quality of drugs, and ensure the stability and safety of drugs, meeting the strict requirements of pharmaceutical production. At this time, sanitary magnetic drive centrifugal pumps are required. Pharmaceutical equipment support: In some pharmaceutical equipment, such as washing machines, reactors, etc., magnetic pumps need to be used in conjunction with transport media to meet the fluid transportation requirements in the pharmaceutical process. At this time, stainless steel chemical process magnetic pumps are needed. Food Industry:  In the fields of food processing and beverage production, magnetic pumps can be used to transport food raw materials or finished products such as fruit juice, milk, and syrup. Since there are no leak-prone or liquid-contacting parts, it will not cause secondary pollution to food, can maintain the original taste and quality of food, and improve the food hygiene standard. At this time, sanitary magnetic drive centrifugal pumps are required.   Electronic Industry:  It is mainly used to transport corrosive liquids, pure water, and other media. In the electronic production process, the purity and cleanliness of the media are required to be extremely high. Magnetic pumps have no seals, which can avoid liquid leakage and damage to electronic equipment, and can also meet the high requirements of the electronic industry for media. At this time, fluoroplastic anti-corrosion magnetic pumps are required.   Electroplating Industry:  It is suitable for the transportation and cyclic filtration of various electroplating solutions, such as chrome-plating solutions, nickel-plating solutions, zinc-plating solutions, etc. Magnetic pumps can run stably in the harsh environment of the electroplating process, ensure the accurate transportation of electroplating solutions, and improve the efficiency and quality of electroplating production. At this time, polyvinylidene fluoride (PVDF) material magnetic-driven pumps are required.     Petrochemical Industry: Crude oil transportation: In the process of oil exploration and transportation, crude oil and its associated media can be transported. Its good sealing and reliability can ensure the safety and efficiency of oil production. At this time, three-screw magnetic-driven pumps are required.   Refining process: In the refinery unit, it is used to transport various high-temperature, high-pressure, and corrosive media, such as transporting relevant liquids in the process of catalytic cracking, hydrocracking, etc. At this time, CQG - G series high-temperature and high-pressure magnetic pumps are required.     Mining Industry: Metal smelting: It is used to transport electrolytes in the metal smelting process and wash the waste liquid generated during the smelting process, which helps to improve the efficiency and environmental protection of metal smelting. At this time, polyvinylidene fluoride (PVDF) material magnetic-driven pumps are required.   Mineral processing: In the mineral processing process, it can transport various slurries, acid solutions, and other media, providing fluid transportation support for each link of mining production. At this time, high-chromium alloy magnetic-driven pumps are required.

The dynamic seal of a centrifugal pump is a sealing method that relies on the centrifugal force of rotating components, and it can be divided into two categories: back-blade seal and auxiliary impeller seal.   Back - blade seal: (1) Structure: Blades are added to the rear cover plate of the impeller of the centrifugal pump, and these blades rotate in the opposite direction to the impeller. These blades are back-blades. (2) Working principle: When the centrifugal pump is in operation, the rotation of the impeller drives the back blades to rotate together. The centrifugal force generated by the rotation of the back - blades will throw the liquid at the rear cover plate of the impeller to the outer periphery of the impeller, reducing the liquid pressure at the rear cover plate of the impeller and forming a low-pressure area. As a result, it is difficult for the high-pressure liquid at the impeller outlet to leak through the gap between the impeller and the pump casing to the low-pressure area, thus achieving the sealing effect. (3) Advantages: The structure is relatively simple, no additional complex devices are required, and the cost is low; it can balance the axial force of the centrifugal pump to a certain extent, reduce axial movement, and improve the operation stability of the pump. (4) Disadvantages: The sealing effect is relatively weak, and it may not be suitable for some occasions with very high sealing requirements; the presence of back-blades will increase the frictional resistance of the impeller, resulting in a slight reduction in the pump's efficiency.   Auxiliary impeller seal: (1) Structure: It usually consists of an auxiliary impeller, auxiliary blades (also called back-blades), fixed guide vanes, and a shutdown sealing device. The auxiliary impeller is a small centrifugal pump impeller, which rotates coaxially with the working impeller of the centrifugal pump. (2) Working principle: During operation, the liquid leaked from the working impeller of the centrifugal pump flows to the auxiliary impeller. The centrifugal force generated by the rotation of the auxiliary impeller forms a pressure head, which can resist the high-pressure liquid at the outlet of the working impeller from leaking out, thereby achieving the sealing purpose. When the pump is shut down, the dynamic seal of the auxiliary impeller does not work. The liquid pressure inside the pump is small, and the liquid leaked to the auxiliary impeller is sealed by the shutdown sealing device. For example, three oil seals and one water-blocking ring are used for sealing. (3) Advantages: The sealing effect is relatively good, and it is suitable for conveying media containing certain impurities because the influence of impurities on the auxiliary impeller is relatively small; during the operation process, the centrifugal force generated by the auxiliary impeller can also play a certain stirring role to prevent the precipitation of the medium. (4) Disadvantages: The rotation of the auxiliary impeller consumes a certain amount of energy, which will increase the power consumption of the pump; the processing accuracy requirements of the auxiliary impeller are relatively high, and the manufacturing difficulty is relatively large.   The dynamic seals produced by Anhui Changyu Pump and Valve Manufacturing Co., Ltd. are all made of fiberglass - reinforced plastic. Due to the relatively low density of fiberglass - reinforced plastic, when the back - blades rotate, at the same rotational speed, their moment of inertia is relatively small. This means that during the starting and stopping processes, the back - blades need to overcome less inertial force and can reach a stable operating state or stop more quickly. From the perspective of the sealing principle, the fiberglass - reinforced plastic back - blades are stable in performance when the centrifugal force generated by rotation throws the liquid at the rear cover plate of the impeller to the outer periphery. Moreover, the good corrosion resistance of fiberglass - reinforced plastic can prevent changes in the blade surface caused by liquid corrosion, thereby maintaining the formation of a low - pressure area stably for a long time and ensuring the sealing effect. For example, in the working condition of transporting a mixed solution of acid, alkali, and salt with a certain concentration, the fiberglass - reinforced plastic back - blades can maintain the sealing performance more effectively compared with metal back - blades and reduce the situation of seal failure caused by corrosion.   The mechanical seal of a centrifugal pump is a high-performance sealing method. The following is a detailed introduction: Structural composition (1) Rotating ring and stationary ring: The rotating ring rotates with the pump shaft, and the stationary ring is fixed on the pump body and remains stationary. They are the key sealing elements of the mechanical seal. They are usually paired with hard materials (such as tungsten carbide, ceramic, etc.) and soft materials (such as graphite, impregnated graphite, etc.). The end faces of these materials are finely ground with extremely high flatness. For example, in some high-temperature and high-pressure application scenarios, the combination of tungsten carbide and graphite is often used. Tungsten carbide has high hardness and good wear resistance, and graphite has good self-lubricating properties and chemical stability. (2) Spring: The spring provides the axial pre - tightening force for the mechanical seal to ensure that the end faces of the rotating ring and the stationary ring are always in close contact during the operation of the centrifugal pump. There are various types of springs, including single-spring and multi-spring forms. The single-spring structure is simple, but the force is unevenly distributed; the multi-spring can make the force distribution more uniform and is suitable for high-speed centrifugal pumps. (3) Sealing ring: It is used to seal the gaps between the rotating ring and the shaft, the stationary ring and the gland, etc., to prevent liquid from leaking from these parts. The material of the sealing ring is selected according to different working conditions. Common materials include rubber (such as nitrile rubber, fluorine rubber, etc.) and polytetrafluoroethylene. For example, when transporting acidic media, fluorine rubber sealing rings can be selected because of their good acid resistance.   Working principle During the operation of the centrifugal pump, the spring force and the liquid pressure act on the rotating ring together, making the end faces of the rotating ring and the stationary ring closely contact to form an extremely thin liquid film. This liquid film has a sealing effect and can also lubricate and cool the end faces. Since the rotating ring rotates with the shaft and the stationary ring is fixed, the existence of the liquid film can reduce friction and wear when the two are in relative motion, when the pressure inside the pump changes, the change in liquid pressure will also affect the sealing force between the rotating ring and the stationary ring, thus ensuring the sealing performance under different working conditions. Advantages (1) Good sealing performance: The leakage of the mechanical seal is extremely small, which can effectively prevent the liquid inside the pump from leaking. It is very suitable for some occasions with strict leakage requirements (such as centrifugal pumps for transporting toxic, flammable, and explosive media). (2) Long service life: The high-quality materials of the rotating ring and the stationary ring and the reasonable structural design enable the mechanical seal to operate stably for a long time under normal working conditions, reducing the trouble of frequent seal replacement. (3) Adapt to various working conditions: It can adapt to complex working conditions such as high temperature (some mechanical seals can work in a high-temperature environment of several hundred degrees), high pressure (the pressure can reach several megapascals or even higher), and high speed (high - speed centrifugal pumps), and has good sealing effects for clean media and media containing a small amount of impurities. (4) Low power loss: Since the liquid film between the rotating ring and the stationary ring plays a good lubricating role and the friction coefficient is small, compared with the packing seal, the power loss of the mechanical seal is lower, which is beneficial to improving the operation efficiency of the centrifugal pump.   Disadvantages (1) Complex structure: The mechanical seal has many components, and the structure is relatively complex, with high requirements for design, manufacturing, and installation. For example, the parallelism of the end faces of the rotating ring and the stationary ring is strictly required, and a slight deviation during the installation process may affect the sealing performance. (2) High cost: The high-quality materials of the rotating ring and the stationary ring are expensive. Coupled with the precision processing technology and complex assembly requirements, the cost of the mechanical seal is much higher than that of other sealing methods such as the packing seal. (3) Sensitive to impurities: If the medium contains more solid impurities or particles, the impurities may enter between the end faces of the rotating ring and the stationary ring, scratching the sealing surface and causing the seal to fail. Therefore, there are certain requirements for the cleanliness of the medium.   The mechanical seals produced by Anhui Changyu Pump and Valve Manufacturing Co., Ltd. have good sealing performance, long service life, can adapt to various working conditions, low power loss, and high processing precision. With strict factory - out inspection, the superior performance of the mechanical seals is ensured.  

Introduction In the field of liquid transportation in modern industry, magnetic-drive pumps stand out with their unique designs and excellent performance. It is an innovative type of pump that utilizes the principle of magnetic coupling to achieve leak-free liquid transportation, providing an effective solution to the leakage problem of traditional pumps under special working conditions. It is widely used in industries such as chemical, pharmaceutical, and environmental protection, where high requirements for safety and sealing are imposed.   Structure of Magnetic Pumps Pump Body And Impeller   Pump Body： The pump body is an important outer casing part of the magnetic drive pump. Its main function is to provide a stable flow passage and accommodation space for the liquid. The selection of its material is crucial and is usually determined according to the nature of the liquid being transported. For corrosive liquids, corrosion-resistant metal materials such as stainless steel and Hastelloy are generally used, or high-performance engineering plastics such as polyvinylidene fluoride (PVDF) are adopted. The designed shape and internal flow channel structure of the pump body are carefully optimized to ensure that the liquid can flow smoothly and efficiently during the flow process, reducing energy loss and turbulence.   Impeller： The impeller, as the core hydraulic component of the magnetic-drive pump, is directly related to the pump's performance. It is installed on the pump shaft and connected to the inner magnetic rotor. There are various types of impellers, and common ones include closed-type impellers, open-type impellers, and semi-open-type impellers. Closed-type impellers have high efficiency and stable flow, and are suitable for transporting clean liquids; open-type and semi - open - type impellers have better anti-clogging capabilities and are suitable for transporting liquids containing certain particulate impurities. During the rotation process, the impeller converts the mechanical energy input by the motor into the kinetic energy and pressure energy of the liquid, enabling the liquid to flow smoothly from the inlet to the outlet of the pump.     Magnetic Transmission Components   Inner Magnetic Rotor： The inner magnetic rotor is one of the key components of the magnetic transmission of the magnetic-driven pump. It is coaxially connected to the impeller. The inner magnetic rotor is usually made of high-strength, high - energy - product permanent magnetic materials, such as neodymium - iron - boron (NdFeB). These permanent magnetic materials can maintain a stable magnetic field strength for a long time, ensuring the reliability of magnetic transmission. The structural design of the inner magnetic rotor needs to consider the uniformity of the magnetic field distribution and the coupling effect with the outer magnetic rotor. At the same time, it also needs to take into account its corrosion resistance and mechanical strength in the liquid, because it is directly in contact with the transported liquid or adjacent to it through the isolation sleeve.   Outer Magnetic Rotor： The outer magnetic rotor is installed on the motor shaft, corresponding to the inner magnetic rotor, and separated by an isolation sleeve. The outer magnetic rotor is also made of permanent magnetic materials, and its magnetic field strength and pole distribution match those of the inner magnetic rotor. When the motor drives the outer magnetic rotor to rotate, the generated rotating magnetic field can penetrate the isolation sleeve and act on the inner magnetic rotor, driving the inner magnetic rotor to rotate synchronously. The design of the outer magnetic rotor needs to consider the firmness of the connection with the motor shaft and the concentricity to ensure the smoothness and high efficiency of the magnetic transmission.     Isolation Sleeve： The isolation sleeve is the core guarantee for the magnetic-drive pump to achieve leak-free operation. It is located between the inner and outer magnetic rotors and completely isolates the liquid inside the pump from the outside. The selection of the material and thickness of the isolation sleeve is very important. On the one hand, it must have good corrosion resistance to resist the erosion of the transported liquid; on the other hand, it must have sufficient strength to withstand the internal and external pressure differences. Common isolation sleeve materials include metals (such as stainless steel) and non-metals (such as ceramics, glass-fiber-reinforced plastics, etc.). Metal isolation sleeves will generate eddy current losses in the magnetic field, affecting the magnetic transmission efficiency, but have high strength; non-metal isolation sleeves have no eddy current losses, but their strength and high-temperature resistance may be relatively weak. Therefore, a reasonable selection needs to be made according to the specific working conditions.   Bearing and Support Structure   Sliding Bearing： Inside the magnetic-drive pump, the pump shaft is usually supported by sliding bearings. Since the transported liquid often has poor lubricity and may even be corrosive, the materials of the sliding bearings must have good wear resistance and self-lubricating properties. Commonly used materials include silicon carbide ceramics, graphite, and filled polytetrafluoroethylene. These materials can reduce wear under harsh lubrication conditions, ensure the stable rotation of the pump shaft, and extend the service life of the bearings. The design of the sliding bearings also needs to consider the fitting accuracy of the pump shaft and the load-bearing capacity to adapt to the load requirements under different working conditions.   Rolling Bearing： Rolling bearings are mainly used to support the outer shaft of the pump, the part connected to the motor. It can effectively reduce the frictional resistance during the rotation process and improve transmission efficiency. The selection of rolling bearings needs to consider factors such as load-bearing capacity, speed range, and lubrication method. Generally, rolling bearings with good sealing performance are used, and appropriate lubricating grease is selected according to the actual working environment to ensure their long-term stable operation. In addition, there are support structures such as connecting frames, whose functions are to ensure the stable relative position between the pump body and the motor, ensure the coaxiality and perpendicularity of each component during the operation of the magnetic-drive pump, and reduce vibration and noise.     Working Principle of Magnetic-Drive Pumps After the motor is started, the motor shaft drives the outer magnetic rotor to start rotating. The rotating magnetic field generated by the outer magnetic rotor penetrates the isolation sleeve and acts on the inner magnetic rotor. Due to the interaction of the magnetic fields, the inner magnetic rotor rotates synchronously within the isolation sleeve. The inner magnetic rotor is connected to the impeller, so the impeller also rotates. Under the action of the impeller's rotation, the liquid is sucked in from the inlet of the pump and enters between the blades of the impeller. With the high-speed rotation of the impeller, the liquid obtains kinetic energy and is thrown towards the edge of the pump body under the action of centrifugal force. In the flow passage formed by the pump body and the impeller, the kinetic energy of the liquid is gradually converted into pressure energy, and the liquid with increased pressure is discharged through the outlet of the pump. During the whole process, due to the action of magnetic transmission, the liquid inside the pump is completely isolated from the outside, and there is no leakage channel of the mechanical seal of traditional pumps, thus realizing leak-free transportation.     Characteristics of Magnetic Pumps   Leak - free Characteristic The greatest advantage of the magnetic-drive pump lies in its leak-free performance. In many industrial occasions, such as the transportation of flammable, explosive, toxic, and harmful liquids in chemical production, or the transportation of liquid medicine with extremely high purity requirements in the pharmaceutical industry, the seal leakage of traditional pumps may cause serious safety accidents and quality problems. However, the magnetic-drive pump completely encloses the liquid inside the pump body through magnetic coupling transmission, eliminating the medium leakage caused by seal failure and effectively ensuring the safety of the production environment and product quality.   Safety and Reliability   Operational Stability： The structural design of the magnetic-drive pump makes it have high stability during the operation process. Since there is no friction and wear at the mechanical seal and the resulting vibration and noise, the magnetic-drive pump operates more smoothly. At the same time, the magnetic coupling can maintain stable transmission during normal operation. When encountering an overload situation, such as impeller blockage or jamming, the outer magnetic rotor, and the inner magnetic rotor can relatively slip, avoiding damage to the motor and transmission components due to excessive torque, playing a certain overload protection role.   Reducing the Risk of Failure： Without the problem of easy damage of traditional mechanical seals, the risk of failure of the magnetic-drive pump is greatly reduced. Mechanical seals are prone to leakage due to wear, aging, and corrosion during long-term operation, while the magnetic transmission components of the magnetic-drive pump have a long service life, reducing sudden failures caused by seal damage, improving the reliability and continuous operation time of the equipment, and reducing the impact of maintenance costs and downtime on production.   Simple Maintenance： Since the magnetic-drive pump has no mechanical seals, packing seals, and other components that need to be regularly replaced and maintained, its maintenance work is relatively simple. This not only reduces the workload of maintenance personnel but also reduces the maintenance cost. In addition, the structure of the magnetic-drive pump is relatively compact, and the number of parts is relatively small, which also makes it more convenient and faster to conduct maintenance and troubleshooting, further improving the maintainability of the equipment.     Development Trends of Magnetic - Drive Pumps With the continuous progress of science and technology, magnetic-drive pumps will develop towards higher performance and more intelligent directions in the future. In terms of materials, the research and development of new magnetic materials will further improve the magnetic transmission efficiency and reduce energy loss. At the same time, the improvement of isolation sleeve materials will make the isolation sleeve have high strength and high corrosion resistance while reducing the impact on magnetic transmission. In terms of design, optimizing the hydraulic design of the pump body and impeller will improve the efficiency and performance of the pump. In addition, with the development trend of industrial automation and intelligence, magnetic-drive pumps will be increasingly integrated into intelligent control systems, realizing functions such as remote monitoring, fault diagnosis, and automatic alarm, further improving the reliability and management efficiency in industrial production, and better meeting the strict requirements of modern industry for liquid transportation equipment.  

Lubrication: During the operation of a slurry pump, the possible intrusion of the conveyed medium, water, and other substances into the oil tank may affect the pump's normal operation. Therefore, it is necessary to check the quality and oil level of the lubricant frequently. The quality of the lubricant can be observed with the naked eye and analyzed by regular sampling. The amount of lubricating oil can be seen from the oil level mark. For a new pump, the oil should be changed once after one week of operation. For a pump with replaced bearings during overhaul, the oil should also be changed. Because foreign substances enter the oil during the running-in of the new bearings and shafts, the oil must be changed. Thereafter, the oil should be changed once every quarter. The lubricating grease and lubricating oil used for chemical pumps should meet quality requirements. Tables 2-8 and 2-9 show the commonly used lubricating grease and lubricating oil for slurry pumps. Vibration: During the operation of the pump, due to reasons such as poor quality of spare parts and maintenance, improper operation, or pipeline vibration, vibration often occurs. If the vibration exceeds the allowable value, the pump should be shut down for maintenance to prevent damage to the machine. Table 2-10 shows the allowable range of vibration values for slurry pumps. Bearing temperature rise: During the operation of the pump, if the bearing temperature rises rapidly and after the temperature rise stabilizes, the bearing temperature is too high, which indicates that there are problems in the manufacturing or installation quality of the bearing; or the quality, quantity, or lubrication method of the bearing lubricating oil (grease) does not meet the requirements. If not dealt with in time, the bearing is in danger of being burned out. The allowable temperature for slurry pump bearings is <65°C for sliding bearings; and <70°C for rolling bearings. This allowable value refers to the allowable range of bearing temperature after running for a period of time. For a newly replaced bearing, at the initial stage of operation, the bearing temperature will rise relatively high. After running for a period of time, the temperature will drop somewhat and stabilize at a certain value. The operating performance of slurry pump: During the operation of the pump, if there is no change in the liquid source and the opening degree of the valves on the inlet and outlet pipelines remains unchanged, but the flow rate or inlet and outlet pressure changes, it indicates that there is a fault in the pump or pipeline. The cause should be quickly identified and eliminated in time, otherwise, adverse consequences will be caused. The size of the system resistance can be achieved by adjusting the opening degree of the inlet and outlet valves of the pump. For a determined pump system, when the outlet valve is fully opened, the system resistance is the smallest, and the corresponding flow rate is the largest, the head is the smallest, and the power is the largest. When the outlet valve is completely closed, the system resistance reaches a maximum value. At this time, the flow rate is zero, the head is the largest (a finite value), and the power is the smallest. From this, the following points can be summarized: When starting a slurry pump, in order to avoid overloading the prime mover, the outlet valve should be closed first and then opened slowly after the pump is started. In this way, it can avoid the superposition of the large starting load of the prime mover and the high power required by the pump when the outlet valve is fully opened, which may cause overloading of the prime mover. As long as the pump chamber is filled with liquid (to avoid dry friction of the sealing ring, shaft seal, etc.), the slurry pump is allowed to operate for a short time when the outlet valve is closed. Except for the rapid temperature rise of the limited liquid in the pump chamber under the action of the rotating impeller, which has some adverse effects on the pump, there is no adverse effect on the prime mover. At this time, the load on the prime mover is the lightest. During operation, any set of flow rates and heads within the performance range of the slurry pump can be obtained by adjusting the opening degree of the outlet valve. However, when the pump operates at the design operating point, its efficiency is the highest; the farther away from the design operating point, the lower the efficiency. Unit sound: The sounds emitted by the pump during operation are some normal and some abnormal. For abnormal sounds, find out the cause and eliminate it in time. The following are roughly the reasons for the abnormal sounds of the pump. Reasons on the fluid side: For example, insufficient inlet flow of the slurry pump causes cavitation and emits noise; air accumulation in the pump outlet pipeline causes water hammer and emits an impact sound. Reasons on the mechanical side: The bearing quality does not meet the requirements or is damaged; the clearance between the moving and stationary parts of the pump is inappropriate, causing friction; shaft bending causes internal friction; parts are damaged and fall off; foreign objects fall into the pump, etc.   For details of the first part, please refer to the previous blog post.

  The following is the first part of the daily operation and maintenance of slurry pumps： tart-up and shutdown： Preparations Before Start-up： Check whether the connecting bolts and foundation bolts of the pump are loose. Check whether the piping connection is proper and whether the centers of the pump and the driver are aligned. For pumps handling high-temperature or low-temperature liquids, the expansion and contraction of the piping may cause shaft misalignment, seizure, etc. Therefore, flexible pipe joints, etc., should be used. Direct coupling and alignment. For small-sized pumps handling normal-temperature liquids, there is no problem in aligning the pump and the motor when the pump is stopped. However, for large-sized pumps handling high-temperature liquids, there is a large difference in the shaft center during operation and stoppage. To achieve correct alignment, generally heat to the operating temperature or stop the pump after the operation and quickly re-align to ensure that the shaft centers of both rotating parts are the same and avoid vibration and pump seizure. Clean the piping. Before operation, the piping must be cleaned first to remove foreign objects, welding slag, etc. from the piping. Do not let foreign objects or welding slag fall into the pump body. Install pressure gauges before and after the strainer in the suction pipe to monitor the clogging of the strainer during operation. Barring. Remove the coupling before start-up, turn the rotor by hand to observe whether there are any abnormal phenomena, and conduct a separate test run of the motor to check whether its rotation direction is the same as that of the pump. By rotating the coupling by hand, it can be found whether there are foreign objects between the impeller and the casing inside the pump. The barring should be even in weight, and there should be no abnormal noise inside the pump. Start the oil pump and check whether the bearing lubrication is good. Priming the pump. Fill the pump chamber with liquid before start-up to discharge air, liquefied gas, and steam from the suction pipe and the pump body. Start-up： The idle operation must be avoided. At the same time, open the suction valve, and close the discharge valve and each discharge hole. Open the cooling water supply valve for the bearings. If the stuffing box has a water jacket, open the cooling water supply valve of the stuffing box. If the pump handling high-temperature liquid has not reached the working temperature, open the preheating valve, and close this valve after the pump is preheated. If the pump is equipped with a liquid-sealing device, open the valve of the liquid-sealing system. If equipped with an overheating device, open the bypass valve of the self-circulation system. Start the motor. When the pump flow increases and overheating is no longer possible, close the valve of the self-circulation system. If the pump must be started with the check valve closed and the outlet gate valve open, the start-up steps are basically the same as the above method, except that the outlet gate valve should be opened for a period of time before the motor is started. Gradually open the discharge valve. Shutdown： Open the valve on the self-circulation system. Close the discharge valve. Stop the motor. If it is necessary to maintain the working temperature of the pump, open the preheating valve. Close the cooling water supply valves of the bearings and the stuffing box. If liquid-sealing is not required during the shutdown, close the liquid-sealing valve. If it is a special pump device requirement or when the pump is opened for inspection, close the suction valve, and open the vent hole and various discharge holes. Usually, the start-up and shutdown steps specified for turbine-driven pumps are basically the same as those for motor-driven pumps. Turbines have discharge valves, various drain holes, and sealing devices, which must be opened or closed before and after operation. In addition, turbines generally require preheating before start-up. Some turbines in the system are required to be started at any time, so barring operation is required. Therefore, the operator should operate according to the relevant regulations on the start-up and shutdown steps of the turbine provided by the turbine manufacturer. Maintenance During Shutdown For standby pumps at the chemical plant site, when the in-use pump fails, they should be able to be switched over in time and put into normal operation to ensure that the chemical production process is not interrupted. This requires the maintenance of the standby pumps to keep them in good condition during the standby and shutdown period. Especially for standby pumps with interlock and automatic switching, their inlet and outlet valves are open, and the pumps are filled with the medium to be transported. As long as the driver rotates, they can start working immediately. For standby pumps during the shutdown period, the quality and quantity of the lubricant should be checked frequently. The pump body and the medium inside the pump that needs to be heated and insulated should be heated and insulated. To prevent the rotor from bending due to its own weight and to prevent the shaft from adhering to the bearings and causing start-up difficulties, the standby pumps should be barring regularly. For pumps that have been shut down for a long time, open the plugs on the pump body to drain the liquid inside the pump to avoid damage to the pump body due to cold weather. If necessary, open the pump body, clean the internal parts, and apply anti-rust oil. For pumps that have been shut down for a long time, whether they are on-site or in the warehouse, they should be barring regularly. For details of the first part, please refer to the next blog post.

Determine the basic parameters: Flow requirement: Determine the required flow rate of the submersible pump according to the treatment scale and sewage transport volume of the sewage treatment plant. Calculate the amount of sewage to be discharged per hour, and select an appropriate - flow submersible wastewater pump based on this. If there is a need for drainage volume adjustment, the flow variation range under different working conditions also needs to be considered. Head requirement: Measure the vertical height difference from the installation position of the submersible pump to the discharge point, and add factors such as pipeline friction losses and local losses to determine the required head. Ensure that the pump's head can meet the requirement of smoothly transporting sewage to the designated position. Consider the characteristics of the medium: Sewage composition: Analyze whether the sewage contains solid particles, fibers, corrosive substances, etc. If there are more solid particles in the sewage, a submersible pump with good flow - passing ability and anti - clogging performance should be selected. Its impeller should be able to effectively pass a certain multiple of the fiber material of the pump diameter and a large proportion of solid particles. For sewage containing corrosive components, the material of the pump should have corresponding corrosion resistance, such as using stainless steel, engineering plastics and other materials. Temperature range: Understand the temperature of the sewage to ensure that the submersible pump can work normally at this temperature. Some special sewage treatment processes may generate high - temperature sewage. At this time, a chemical resistant submersible pump that can withstand high temperature and chemical corrosion needs to be selected.     Concentration and viscosity: The concentration and viscosity of sewage will also affect the selection of submersible pumps. High - concentration and high - viscosity sewage require pumps with strong transport capacity and motor - carrying capacity, and the price of such submersible pumps will be relatively high.   Evaluate the installation environment:   Submerged depth: Measure the installation depth of the submersible pump in the sewage tank or treatment facility to ensure that the submerged length of the selected pump can meet the requirements. Generally, the submerged depth of the submersible pump has a certain range limit, and an appropriate model needs to be selected according to the actual situation, such as a submersible water pump for well.For example submersible corrosion-resistant pumps.   Space limitation: The spatial layout of the sewage treatment plant may be relatively compact, so the installation space of the submersible pump needs to be considered. Selecting a compact - structured and small - volume submersible water pump can save installation space and facilitate maintenance and inspection.   Surrounding facilities: Check whether there are other equipment or obstacles around the installation position of the submersible pump to ensure that the installation and operation of the pump will not be affected. At the same time, consider the impact of the pump's vibration and noise on the surrounding environment.   Select reliable brands and suppliers:   Product quality: Select submersible pump manufacturers with good product quality and high reliability, which can provide good after - sales service. Information such as word - of - mouth in the industry and user reviews can be referred to.   Supplier's qualifications: The supplier should have good reputation and qualifications, and be able to provide formal product sales and after - sales service. Check the supplier's business license, production license and other relevant certificates to understand its production capacity and technical level.   After - sales service: The submersible pump may malfunction or require maintenance during use, so the supplier's after - sales service is crucial. Ensure that the supplier can provide timely technical support, repair service and spare parts supply.

     First, it is necessary to have a detailed understanding of the chemical substances that need to be transported in the chemical plant. This includes information such as the name, chemical formula, concentration, and pH value of the chemical substances. At the same time, it is also necessary to consider whether the chemical substances are oxidizing, reducing, or containing solid particles.      Second, according to the properties of the chemical substances, select appropriate pump body, impeller, and sealing materials. Generally, a ptfe centrifugal pump can be chosen. Its pump body is lined with fluoroplastic (polytetrafluoroethylene). Or a PTFE centrifugal pump can be selected. Its pump body is lined with PTFE. For sealing materials, when transporting organic solvents, mechanical seals can be used. The sealing surface materials can be selected as silicon carbide-silicon carbide (SiC-SiC) pairing. This material combination has good wear resistance and chemical corrosion resistance and can effectively prevent organic solvent leakage.      Third, according to the flow and head requirements calculated according to the production process requirements of the chemical plant, select the appropriate model from the product catalog of the manufacturer of chemical corrosion-resistant centrifugal pumps. For example, the CYH Series Stainless Steel Chemical Centrifugal Pump produced by Anhui Changyu Pump Valve Manufacturing Co., Ltd. is a chemical corrosion-resistant centrifugal pump. Its flow and head range can meet the requirements of various chemical productions. Its rated performance points and overall dimensions are marked in accordance with the international standard IS02858-1975(E). It is an energy-saving product that replaces F-type corrosion-resistant pumps.      Finally, consider the transportation temperature and system pressure of chemical substances. Some materials may lose their corrosion resistance at high temperatures. At this time, it is necessary to select a centrifugal pump that is both high-temperature resistant and corrosion-resistant. For example, the CYF Series Fluoroplastic Centrifugal Pump produced by Anhui Changyu Pump Valve Manufacturing Co., Ltd. is a chemical corrosion-resistant centrifugal pump. Its flow and head range can meet the requirements of various chemical productions. It can continuously transport strong corrosive media such as sulfuric acid, hydrochloric acid, hydrofluoric acid, nitric acid, aqua regia, strong alkali, strong oxidant, organic solvent, and reducing agent of any concentration at a temperature range of -85°C to 200°C.          

The wearing parts are the most vulnerable parts of the slurry pump. During use, repair and maintenance, special care is required for the wearing parts. UHB slurry pump is a cantilever single-stage single-suction centrifugal pump, which is specially designed and developed for conveying corrosive media containing fine particles. The pump is made of steel-lined ultra-high molecular weight polyethylene, which is a new generation of corrosion-resistant and wear-resistant engineering plastics for pumps. Its outstanding advantage is that it has excellent wear resistance, impact resistance, creep resistance and excellent corrosion resistance among all plastics. So what are the vulnerable parts of a pump and what should be paid attention to? The pump casing of the slurry pump is generally a cast iron part, and the special pump has an inner lining material, which is prone to cracks under the action of mechanical force or thermal stress. When the slurry pump is impacted by cavitation during work or frozen in winter without draining the accumulated water in the pump casing, it is also prone to rupture. If the damage is serious and cannot be repaired, a new pump casing should be replaced The pump shaft of the slurry pump is generally a carbon steel part, but it is also easily damaged due to manufacturing quality, use or installation. The pump shaft may crack, fold, wear the journal, damage the thread, etc., and may also break. If the damage is serious and cannot be repaired, a new shaft should be replaced. The impeller is an important working part of the slurry pump and is made of cast iron. It is also easily damaged due to manufacturing quality and use. The impeller may crack, and the surface may form holes or perforations due to cavitation. The blades may become thinner or wear unevenly due to long-term grinding, or even be crushed by debris. Some defects can be repaired; some defects cannot be repaired, that is, a new impeller should be replaced. The bearing bush of the sliding bearing is generally cast from copper-tin alloy, which has poor wear resistance and is one of the vulnerable parts that are easy to wear and burn out. The bearing bush can generally be repaired (repair) or replaced with a new one. slurry pump manufacturer slurry pump is suitable for non-ferrous metal smelting industry: especially for various acid liquids, corrosive ore slurry, slurry (for filter press), electrolyte, sewage and other media transportation in wet smelting of lead, zinc, gold, silver, copper, manganese, cobalt, rare earth, etc. The chemical slurry pump is a pump that can adapt to various working conditions, such as conveying acid, alkaline clear liquid or slurry; various corrosive slurries in the smelting industry; various dilute acids in the sulfuric acid industry; various sewage in the environmental protection industry, etc. The pump is both corrosion-resistant and wear-resistant, and has a wide range of uses. The average service life of rolling bearings is generally 5,000 hours, but improper installation, long service time or poor maintenance can also cause wear or damage. Except for individual parts of rolling bearings that can be replaced with new ones, the entire part must generally be replaced.      The mouth ring is also called the leakage reduction or wear reduction ring. It is one of the parts that are easily worn in the slurry pump. It can be repaired or replaced with a new one after wear. When replacing a new leakage reduction ring, its inner diameter should be configured according to the outer diameter (outer edge diameter) of the impeller (referring to the wheel with moving blades). If the outer diameter of the impeller water inlet is worn, it can be turned to eliminate grooves and ovals, and then a leakage reduction ring with a reduced inner diameter can be configured. The outer diameter of the impeller water inlet can generally be turned three times.  

Do you need a reliable and efficient solution to handle high-temperature applications involving phosphate slurry? Look no further! In this article, we will delve into the world of high-temperature mortar pumps and explore how chemical mortar pumps effectively address the challenges brought by phosphate slurry. Whether you are a professional in the chemical industry or simply curious about this specialized pump, please continue reading to gain the insights you need! What makes high-temperature mortar pumps stand out in harsh application environments? Imagine that in an environment with high temperature and strong corrosiveness like phosphate slurry, ordinary pumps would be overwhelmed. The chemical mortar pumps designed by Anhui Changyu Pump Valve Manufacturing Co., Ltd. specifically for such challenges are the heroes of today. With their corrosion-resistant and high-temperature-resistant FPA materials, they ensure smooth and reliable operation even under the harshest conditions. Phosphoric acid slurry pumps are a special kind of high-temperature pump specifically designed to handle various chemical substances, including phosphoric acid slurry. Through the use of special materials and innovative technologies, these pumps can effectively withstand high temperatures, resist corrosion, and have excellent durability. Their design ensures precise control of flow and transportation, making them an indispensable tool in various industries such as chemical manufacturing, refineries, and sewage treatment plants. One of the key advantages of phosphoric acid slurry pumps is their compatibility with phosphoric acid slurry. This highly corrosive and viscous liquid requires a pump that can handle its unique properties without affecting performance. Chemical mortar pumps are specifically designed to provide effective sealing, prevent leakage and minimize downtime. Their sturdy materials and structure ensure long-term operation even under challenging conditions such as transporting phosphoric acid slurry. In addition to reliability in handling phosphoric acid slurry, chemical mortar pumps also offer other advantages that meet user needs. These pumps are designed for easy maintenance, allowing quick access to components for inspection, cleaning and repair. Their efficient operation helps reduce operating costs, and the compact design saves valuable space. Whether you need continuous pumping or intermittent operation, chemical mortar pumps can be customized according to your specific needs. When it comes to handling high-temperature applications and dealing with corrosive substances such as phosphoric acid slurry, high-temperature mortar pumps, especially chemical mortar pumps, stand out as a reliable and efficient solution. They can withstand extreme temperatures, resist corrosion and handle challenging substances, making them an indispensable asset in various industries. Therefore, if you are looking for a pump that can easily handle phosphoric acid slurry and maintain optimal performance, consider exploring the capabilities of chemical mortar pumps. Experience the power of cutting-edge technology and ensure smooth operation in high-temperature environments.