Technical Video
When purchasing a water pump, head is an important consideration. Head refers to the vertical height to which the pump can lift water. However, does this mean that a higher head is always better? To some extent, a higher head does have its advantages. It ensures that water can be delivered to a higher location or overcome greater resistance, which is crucial in certain applications. For example, in a water supply system that needs to deliver water to high-rise buildings, a higher head can meet the water needs of users on higher floors. However, simply pursuing a higher head isn't always a wise choice. First, high-head pumps are typically more expensive, which increases the purchase cost. If your actual needs don't require such a high head, purchasing a high-head pump may result in unnecessary waste of money. Second, high-head pumps often require more power to operate, which means higher energy consumption. In the long run, this can result in higher electricity bills and increased operating costs. Furthermore, high-head pumps can have some disadvantages in some situations. For example, in some applications where water velocity and pressure requirements are low, excessive head may cause excessive water turbulence, impacting and damaging pipes and equipment. Therefore, when purchasing a water pump, we shouldn't simply assume that higher head is better. We need to comprehensively consider actual usage needs, cost, and other factors. When determining head, we should accurately calculate and evaluate the specific application scenario, such as water supply height and pipe resistance. Other pump parameters should also be considered, such as flow rate, power, and efficiency. These parameters are interrelated and require a comprehensive balance when selecting a pump. In short, head is an important consideration when purchasing a water pump, but it's not the only one. We should make a reasonable choice based on our actual situation to ensure we purchase a pump that meets our needs and offers the best value for money. Don't blindly pursue high head; instead, consider a comprehensive approach based on the specific situation to achieve optimal performance and economic benefits.
Flange interface leakage Cause: This is typically caused by excessive strain on the fastening screws. Solution: Tighten the screws diagonally, not all at once. Ideally, the gasket between the two flanges should be the same size as the flanges. The motor is running but no water is being pumped out. Check the motor's direction of rotation Cause: The motor may be running in the wrong direction, or there may be air leaks at the inlet. Solution: Check the motor's direction of rotation and check for air leaks at the inlet. Mechanical seal leakage The mechanical seal is burned due to dry pumping without water Possible cause for new pumps: Dry running without water may damage the shaft seal. For older pumps, there are several possible causes: 1. Wear on the dynamic and static seal surfaces Cause 1: Overtightening. Observe the dynamic and static seal surfaces. If there is severe burning, blackening, or deep marks, or if the sealing rubber has hardened and lost its elasticity, this is due to overtightening. Cause 2: Too loose installation. Observe the surfaces of the dynamic and static seal rings. A thin layer of scale can be wiped off, and the surfaces are largely unworn. This is caused by a loss of spring elasticity, improper assembly, or axial movement of the motor. Cause 3: Poor water quality containing particles. Poor water quality, containing small particles and a high hydrochloric acid content in the medium, can cause abrasive wear on the seal surfaces or strain, creating grooves and annular grooves. Cause 4: Dry wear damage caused by water shortage. This phenomenon is often seen in bottom-valve installations with negative inlet pressure, air in the water inlet pipe, and air in the pump cavity. After the pump is started, the friction of the seal at high speed generates high temperatures, preventing cooling. Check the seal to see if the spring tension is normal, the friction surface is charred and blackened, and the rubber is hardened and cracked. Cause 5: Cavitation. Cavitation primarily occurs in hot water pumps. Because the medium is hot water, the high water temperature generates steam. Steam in the pipes enters the high areas of the pump chamber, where it cannot be expelled. This causes water shortages, dry wear of the mechanical seal, and cavitation. An automatic exhaust valve must be installed and the mechanical seal replaced. Cause 6: Assembly issues. The pump cover may not be installed level, causing the shaft and cover to be misaligned, resulting in misalignment of the moving and static surfaces. Short operation can lead to wear on one side and water leakage. It's also possible that the rubber components or surfaces of the moving and static rings may be damaged during installation. 2. Mechanical sealant failure Causes of mechanical sealant failure: Aging and deformation of rubber components, primarily in hot water pumps. Symptoms of mechanical sealant failure include excessively high water temperatures, which dissolve the rubber. Visually, the rubber surface appears loose and rough, losing its elasticity, leading to failure. 3. Causes of failure in the static ring chamber of the pump cover The primary cause is large dimensional errors in the machining of the inner bore of the static ring chamber, resulting in a rough surface. Symptoms include water spraying from the axial direction, a gap between the stationary ring and the inner bore, or a rough inner bore, causing the stationary ring to rotate with it and rubber wear. 4. Poor machining precision, undersized, rough, or rusty motor journals The motor journal (where the rotating ring rests) may be undersized, or the pump may be corroded by corrosive media, or due to prolonged downtime, with water acting as the medium. The electrode potential difference between the steel shaft and the cast impeller and pump cover creates a galvanic reaction, leading to journal corrosion. Symptoms include spotty corrosion on the surface.
This video explains the working principles and components of three solar water pump systems, as well as where solar water pumps are used. Small system pumps are equipped with DC motors, directly powered by solar energy through a controller. Larger systems can use a controller to convert AC power to DC when sunlight is absent, which then powers the pump. Even larger solar systems use an inverter and controller to convert DC solar power to AC power, which drives the pump and other electrical equipment. Solar water pumps are widely used in remote areas for household water collection, agricultural irrigation, water oxygenation, and desertification control, where power infrastructure is limited. They significantly reduce construction and electricity costs. Solar water pumps are energy-efficient and green, and they protect the planet. Please use them!
On the beautiful Weishan Lake, there is one of China's largest drainage pump companies. Its products are explosion-proof, wear-resistant, high-lift and high-temperature resistant, and are widely used in drainage of various coal mines, gold mines, iron mines, and other mines. And drainage of tunnels and construction projects. It not only has coal safety certification, but also has ordinary explosion-proof certifications of EXDIIBT4 and EXDIICT4. Its motors are all equipped with H-class insulation as standard, so it can transport 60-degree high-temperature media. Its standard overcurrent material is ductile iron, which is more wear-resistant than cast iron. It can also use more wear-resistant high-chromium iron and duplex steel impellers. Depending on the different lifts of the water pump, you can also choose a multi-stage impeller drainage pump. The maximum lift of the submersible drainage pump can reach 800 meters, and the maximum lift of the emergency forced drainage pump can reach 1700 meters. Unlike most pump companies whose castings come from outsourcing, it has two automated casting production lines. Its components are all processed by automated machine tools, which not only improves efficiency but also improves quality. After assembly, each water pump will undergo rigorous testing, so there is strict quality control from components to the whole machine.
I. Product Overview The KSB KRT series products are advanced [product type, such as submersible pumps, industrial valves, etc., to be completed according to the actual product], integrating more than a hundred years of professional technology and innovative design concepts of KSB. T This series of products is widely used in many fields such as building and industrial technology, water transportation, sewage treatment, and power plant processes. II. Product Features (1) High - Efficiency and Energy - Saving 1. Motor Optimization: 2. Hydraulic System: (2) Flexible Installation 1. Wet and Dry Installation: 2. Multiple Installation Forms: (3) High Reliability 1. Sealing and Protection: 2. Materials and Structure: (4) Low Maintenance Cost 1. Anti - Clogging Design: It has large free passages, starting from 3 inches and above, which can effectively reduce the risk of blockage by solid particles and fibrous substances, reducing maintenance workload. At the same time, for different application scenarios, appropriate impeller types can be selected, such as vortex impellers, single - vane impellers, multi - vane impellers, screw - type impellers, or grinder impellers, further reducing the possibility of blockage. 2. High - Quality Components: High - quality bearings, mechanical seals and other components are selected, reducing friction losses and the wear rate of components, thereby reducing the frequency of maintenance and component replacement and lowering maintenance costs. III. Product Models and Parameters The KRt series includes a variety of models to meet the needs of different flow rates, heads, and application scenarios. The following are examples of some common models and parameters: Model Flow Range (m³/h) Head Range (m) Motor Power (kW) Impeller Type Applicable Media Amarex KRT K 150 - 403 / 130 4 xng - s XX - XX XX - XX XX XX Sewage, liquids containing solid particles and fibers, etc. Amarex KRT F 65 - 215 XX - XX XX - XX XX XX Industrial wastewater, urban sewage, etc. (Note: "XX" in the above parameters needs to be filled in completely according to the actual product data) IV. Application Fields 1. Sewage Treatment:. 2. Industrial Applications: 3. Building and Municipal Engineering: . 4. Agricultural Irrigation: V. Operation and Maintenance 1. Operation Guide: Before starting the KRt series products, ensure that all connecting parts are firmly installed, check whether the motor wiring is correct, and whether the monitoring devices such as liquid level and pressure are working properly. When starting, it should be turned on step by step according to the operation procedures to avoid sudden loading and damage to the equipment. During operation, closely monitor the operating status of the equipment, such as parameters like flow rate, head, motor current, and temperature. If there are any abnormalities, stop the machine immediately for inspection. 2. Maintenance Points: Regularly maintain the equipment, including checking the wear of the mechanical seal and replacing the worn parts in a timely manner; cleaning the pump body and impeller to prevent impurity accumulation from affecting performance; checking the lubrication of the bearings and replenishing or replacing the lubricating oil regularly; conducting insulation testing on the motor to ensure the safe operation of the motor. At the same time, it is recommended to use spare parts and lubricating oil provided by KSB's original factory to ensure the performance and service life of the equipment. VI. After - Sales Service KSB has a global sales and service network, providing users with comprehensive technical support and after - sales services.
The double suction pump does not have two suction ports, but the water is divided into two streams after entering the pump chamber. The symmetrical structure of the impeller balances the axial force of the water pump, and the supports at both ends of the shaft reduce the radial force of the water pump. Therefore, the double suction pump can also operate stably at a very large flow rate (50,000 cubic meters/hour).
Mechanical diaphragm metering pump Application areas: widely used in environmental protection, municipal administration, pharmaceuticals, food, sewage treatment and scientific research and other industries, transporting various chemical agents. Material: stainless steel, fluoroplastics, other materials Product description: The mechanical diaphragm metering pump adopts a reliable double cam structure, suitable for a variety of harsh working conditions, low noise, simple disassembly, convenient maintenance, oil bath lubrication, and long service life of the drive components. Performance and advantages: Mechanical drive diaphragm, the diaphragm adopts a multi-layer composite structure of ptfe and elastic rubber, with no leakage and durable. There is no diaphragm guard on the material side to facilitate the passage of materials PVC, PVDF, 316SS and other pump head materials are optional, suitable for various materials Self-cleaning check valve structure Flow regulation can be achieved in shutdown or running state High-precision worm gear and worm technology runs smoothly Core 3 major advantages Pure copper core motor is durable (reliable performance) High-quality pump body (excellent quality) Specialized diaphragm (durable and practical) Various pump head options Various materials to meet more requirements
Detailed explanation of the working principle of horizontal multistage pump Horizontal multistage pump realizes multiple pressurization of liquid by connecting multiple impellers in series on the same shaft, thereby meeting the transportation requirements of high head. The following is a detailed explanation of its working principle from the aspects of structural composition, work flow, energy conversion, etc. 1. Structural basis Horizontal multistage pump is mainly composed of suction section, middle section, discharge section, impeller, pump shaft, guide vane, sealing components (such as mechanical seal or packing seal), bearing components, etc. The pump body is arranged in the horizontal direction, and multiple impellers are installed on the pump shaft in sequence. Adjacent impellers are separated by the middle section and guide vanes are set. The impeller is the core working component with several curved blades; the guide vane surrounds the outer periphery of the impeller and looks like a fixed blade. Its function is to guide the flow of liquid and convert energy. 2. Work flow 1. Liquid suction: Before starting, the pump body and the suction pipeline must be filled with liquid to exclude air. When the pump is started, the impeller rotates at high speed (usually at 1450r/min or 2900r/min), and a low-pressure area is formed in the center of the impeller due to centrifugal force. Under the action of atmospheric pressure or the pressure of the front equipment, the liquid enters the pump through the suction section and flows to the center of the impeller. 2. Centrifugal supercharging: The liquid entering the impeller rotates at high speed with the impeller under the push of the blades. Under the action of centrifugal force, the liquid is thrown from the center of the impeller to the outer edge of the impeller along the flow channel between the blades, and the flow rate and pressure increase significantly. 3. Guide vane flow guidance and energy conversion: The high-speed liquid thrown out of the impeller enters the guide vane, and the flow channel of the guide vane gradually expands and diffuses. When the liquid flows in the guide vane, the flow rate gradually decreases, and the liquid is smoothly guided to the inlet of the next impeller. 4. Multi-stage continuous supercharging: After the supercharging of the first-stage impeller and guide vane, the liquid enters the inlet of the second-stage impeller, repeating the above process of obtaining kinetic energy in the impeller and converting it into pressure energy in the guide vane. Horizontal multistage pumps are usually composed of 2-12 impellers. The pressure of the liquid is increased once after each impeller and guide vane. The multistage series connection allows the liquid to be pressurized multiple times and finally reach a higher pressure, which is discharged from the discharge section to meet the needs of long-distance transportation or overcoming high resistance. 3. Energy conversion mechanism During the operation of the horizontal multistage pump, the motor transmits mechanical energy to the pump shaft through the coupling to drive the impeller to rotate. The impeller works on the liquid and converts the mechanical energy into the kinetic energy and pressure energy of the liquid. In the impeller, the conversion of mechanical energy to the kinetic energy of the liquid is mainly realized; in the guide vanes and the expansion flow channel of the pump body, the kinetic energy of the liquid is gradually converted into pressure energy. In the whole process, although there is energy loss caused by friction, impact and other factors, the energy conversion efficiency can be effectively improved by reasonably designing the shape and size of the impeller and guide vanes, so that the horizontal multistage pump can operate efficiently and stably. 4. Working characteristics The horizontal multistage pump has remarkable characteristics due to its unique working principle. Compared with single-stage pumps, it can achieve higher head and is suitable for high-rise building water supply, long-distance water delivery, mine drainage and other occasions that require high-pressure liquid delivery. At the same time, the flow rate of multi-stage pumps is relatively stable. By adjusting the speed, number of stages or parallel operation of the pump, the performance parameters of the pump can be flexibly adjusted to meet the needs of different working conditions.
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