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Axial Flow Pump Axial flow pumps or shaft pumps are a type of pump that is designed to allow fluid to flow along the axis of a rotating shaft, unlike centrifugal pumps where fluid is thrown radially. Basic Operating Principles Rotating Impeller: The pump contains multiple impeller blades arranged along its axis. As the impeller rotates, it propels the fluid in front of it, pushing it forward in the axial direction. Driving Force: The force that causes the fluid to move is the individual impeller blades, each designed to be angled to push the fluid forward. As the impeller rotates, the fluid is continually pushed forward, creating a flow of fluid. Flow: As multiple impeller blades work together, the fluid is accelerated and continues to flow through the pipe. Axial Flow Pump High Flow Rate: This type of pump is ideal for applications requiring high flow rates, such as drainage, cooling, and irrigation systems. Low Pressure: Despite its high flow rate, axial flow pumps typically do not provide very high pressures, making them ideal for applications requiring fluid delivery over short distances. Simple Structure: This type of pump has a relatively simple design, resulting in low production and maintenance costs. Axial Flow Structure Applications Axial flow pumps are widely used in a variety of industries, including: Water industry: Used for pumping raw water from natural sources, wastewater, or wastewater treatment systems. Agricultural industry: Used for pumping water for irrigation. Paper industry: Used for pumping water during the paper production process. Energy industry: Used in cooling systems in power plants. Conclusion Axial flow pumps are pumps that work by pushing fluid forward along the axis of a rotating shaft. With the advantages of high flow rates and simple construction, this type of pump is popular in many industries. Axial Flow Pump Advantages Ideal for applications requiring the movement of large volumes of liquid at low pressure, such as drainage and irrigation systems. High efficiency for moving large volumes of liquid in large pipes. Simple, uncomplicated design for easy maintenance. Lower installation and maintenance costs than some other types of pumps. Durable and ideal for heavy-duty applications. Provides smooth, continuous flow, reducing energy loss. Disadvantages Not suitable for high-pressure applications. Efficiency decreases when used in high-viscosity environments. Large size requires more installation space. The cost of manufacturing and managing the impeller system may be higher than other pumps in the low-pressure category. The impeller may wear out more quickly when used with corrosive liquids. Precise flow control may be difficult compared to other pump types. cr. รศ.ดร.เฉลิมเกียรติ วงศ์วนิชทวี For more information Tel. 02-292-1067-70 Youtube : Leopump ประเทศไทย Line Official : @775ruust Facebook : LEOpumpThailand TikTok : Leopumpthailand

What is a diaphragm pressure tank? Why is it important? A pressure tank is a tank used to store water that is left over from pumping by a water pump and from the flow of water at the water supply point. It is stored in the tank and then distributed to the pump. It is commonly used in buildings, condominiums, industrial factories, houses, etc. Structure A diaphragm pressure tank is a closed vessel containing a diaphragm (a flexible rubber sheet) inside. It is divided into two parts: 1. The water-filled part, which is connected to the water supply pipe. 2. The air-filled part, which is located above the diaphragm. Pressure Tank Operation Principle The principle of operation is that when the water pump is turned on, it first pumps water into a storage tank, which contains a diaphragm inside the tank. The bag expands until the bag is full, then shuts off. When water is used, water is first drained from the pressure tank before the pump has started. For example, in homes and buildings with conventional water pumps without pressure tanks, the pump starts immediately upon turning on the water. This can cause loud noises due to the pressure in the pipes, creating a reaction known as water hammer. However, if a pressure tank is used and the water is turned on, the pump will not start, but will use the water in the tank first, until the pressure drops, and then the pump will resume pumping water to refill the tank. Why is a diaphragm pressure tank important? 1. Maintains constant water pressure: When water is turned on, the water in the pressure tank is used first, preventing rapid water pressure drop and preventing the pump from running too frequently, which extends the life of the pump. 2. Prevents water hammer: When the pump suddenly stops, the water flow in the pipes also stops. This can cause shock or pressure surges in the pipes, which can damage pipes and equipment. A diaphragm tank helps absorb these shocks. 3. Reduces pump load: Because the diaphragm tank stores reserve water, the pump reduces the need for frequent operation, saving energy. 4. Prevents pump run-off: Without a diaphragm tank, the pump could run until the water in the system is depleted, causing the pump to run dry and become damaged. For water pumps without a pressure tank: During a water pump shutdown due to the required pressure, if water is used, the system pressure will gradually decrease until it reaches the point where the pump must restart. This may result in continuous operation or frequent disconnection, reducing the pump's lifespan. When a water pump stops, if water is used, the system pressure will gradually decrease until it reaches the point where the pump must restart. During this time, the system pressure will become unstable, resulting in inconsistent pressure. The water supply may be inconsistent or weak. Therefore, when large amounts of water are used, such as in high-rise buildings, a pressure tank is required. Bootster Pumps can address pump lifespan and inconsistent water pressure. Mini Booster Diaphragm Pressure Tank Pressure Tank Components Pressure Tank The tank is available in both vertical and horizontal configurations, with a diaphragm insert inside. Diaphragm Insert This is the insert used to hold water inside the diaphragm pressure tank. It is typically black and made from a variety of materials, such as Butyl, which is suitable for potable water and is of high quality, EPDM, a highly flexible synthetic rubber, or natural rubber. Air Pressure Air is located between the tank and the diaphragm insert. Pressure Gauge (available on some models) A device used to measure the pressure inside the tank. How to Select You need to know the water pressure you're using to adjust the pressure appropriately for your application. Choose the right size for both the water pump and the pressure tank. Choose quality materials. Precautions for Use Check the pressure tank's pressure regularly every month. For more information Tel. 02-292-1067-70 Youtube : Leopump ประเทศไทย Line Official : @775ruust Facebook : LEOpumpThailand TikTok : Leopumpthailand

A swimming pool pump is the heart of every swimming pool. Its primary function is to draw water from the pool through the skimmer and main drain pipe, push water through the outlet filter, and return it to the pool via the return pipe. The filter traps hair and lint. The electric motor is air-cooled and should not be allowed to splash into the motor, as this can cause damage. Choosing the right swimming pool pump is crucial to ensuring the pool's filtration system operates efficiently. This not only keeps the pool water clean, but it also reduces long-term costs, such as electricity and maintenance. An improperly sized swimming pool pump can lead to various problems, such as unclean water, dirt buildup, high electricity bills, and accelerated equipment wear. Therefore, selecting the right swimming pool pump is crucial. What is a swimming pool pump? How is it calculated? For pools with waterfalls, fountains, or water jet systems, you may need to add approximately 5-10% of the total water volume to the pool pump to efficiently handle the additional water flow. This calculation can be done using various formulas based on the shape of the pool: Rectangular pool: Width x Length x Depth x 7.5 = Volume (gallons) Circular pool: Diameter of pool ÷ 2 to obtain the pool radius. Then, use the formula 3.14 x Radius divided by 2 x Depth x 7.5 = Volume (gallons). Calculating the flow rate of a swimming pool pump (Flow Rate) The flow rate of a swimming pool pump refers to the amount of water a pool pump can pump in a given period of time. Generally, we should expect the pool pump to circulate the entire pool in 8 hours to maintain cleanliness and balance. We can calculate the required flow rate using the formula: Example: A swimming pool with a volume of 75,000 liters and requiring a circulation cycle in 8 hours. If faster water filtration is required, such as for a pool with a large number of users, a shorter circulation cycle time, such as 6 hours, may be considered for more efficient water filtration. Choosing an oversized pool pump can waste energy and increase costs. Therefore, choosing the right pool pump will save energy and reduce costs in the long run. You should also consider additional circulation for accessories such as waterfalls or water jets, which require approximately 10-15% more flow than calculated to ensure the overall system operates smoothly and efficiently. The flow rate is the total volume of water a pool pump can circulate in a given period of time. For example, a system should circulate the entire pool in 8 hours, which is a common standard. Calculation Formula Flow Rate (liters/hour) = Pool Water Volume (liters) ÷ Circulation Time (hours) Flow Rate (liters/hour) = Pool Water Volume (liters) ÷ Circulation Time (hours) Flow Rate (liters/hour) = Pool Water Volume (liters) ÷ Circulation Time (hours) Calculation Steps Q = Flow Rate (liters/hour or cubic meters/hour) V = Pool Volume (liters or cubic meters) T = Circulation Time (hours) Calculate Pool Volume (V) V = Length x Width x Average Depth. If volume is expressed in cubic meters, multiply by 1,000 to convert to liters (1 cubic meter = 1,000 liters). Determine the Circulation Time (T) Typical swimming pool circulation time: Regular swimming pools: 6-8 hours Kids' pools: 2-4 hours Hotel/public pools: 4-6 hours Calculate the Flow Rate (Q) Dividing the pool volume (V) by the circulation time (T). Consideration of other factors Criteria In addition to flow rate, other factors must be considered to ensure optimal pool system efficiency. Pipe Friction: If your pool has long or curved pipes, this creates resistance to water flow. You may need to choose a more powerful pool pump or use a larger pipe to reduce friction. Filter Type: Different filter types, such as sand, ceramic, or paper, have different water pressure requirements. Sand filters typically require higher pressures, while ceramic filters offer the advantage of finer filtration but require more maintenance. Pump Distance from Pool: Distance affects pool pump efficiency. If the pump is located far from the pool, you may need to increase the pump's power or use a friction-reducing pipe to compensate for pressure loss. Climate and Environment: If your pool is located in an area with high winds, dust, or trees, you should choose a pool pump capable of circulating the water more frequently to maintain clean water. Additional filtration equipment may also be required to prevent leaves or dust from entering the system. Water Temperature: If your pool is heated or heated, water viscosity and flow may affect the pool's performance. You may need to choose a pool pump that can handle higher liquid temperatures. Additional Applications: If your pool has additional features, such as a waterfall, fountain, or spa system, you may need to add a pump or select a pump that can handle these increased flows to ensure optimal performance. Sand or cartridge filter Sand Tank Filter types can include diatomaceous earth (DE) filters, sand filters, or cartridge filters. DE filters are the most expensive, but they also produce the cleanest pool water. Cartridge filters are easy to maintain. If you clean them every four to six months, they will last for two to four years. Sand filters are the least expensive, but they don't filter water as well as DE and other types of filters. Proper Swimming Pool Pump Installation The water pump should be installed within the pool area or as close to the pool as possible and placed in a suitable location. It should also be secure and stable to ensure user safety. The diameter of the water pipe used should be larger than or equal to the pump outlet pipe. If possible, use a suction pipe with a diameter no smaller than 2 inches. The overflow channel should be 20 cm deep. The calculation of water reserve area in the case where the pool is full of users is as follows: Each person uses 1 square meter of space. Each person displaces approximately 75 liters of water. 75 x number of people in the pool = reserve water volume. A private pool uses 2 square meters of space per person, which will displace approximately 75 liters of water. Calculate 75 x number of people in the pool using the formula (pool size (sq m) ÷ 2) = reserve water volume. "Finally, I hope that anyone looking to use a swimming pool pump will gain some knowledge... And don't forget to consider the proper usage and after-sales service of that brand." For more information Tel. 02-292-1067-70 Youtube : Leopump ประเทศไทย Line Official : @775ruust Facebook : LEOpumpThailand TikTok : Leopumpthailand

Solar panels won't work at their full potential after a period of use. Dirt, such as dust, leaves, or bird droppings, will cling to the panels. These things will affect the flow of electricity, causing damage to the solar panels and even causing them to burn. Therefore, we should have a cleaning tool for solar panels. However, cleaning solar cells incorrectly can reduce their efficiency. So, let's take a look at how to clean and maintain solar panels. How do you clean solar panels? 1. Thoroughly clean the solar panels. Spray water over the solar panels thoroughly with a hose to remove any dust. 2. Use safe materials for cleaning the solar panels. You must choose soft tools that will not damage the solar panel surface, such as sponges and cloths. Avoid using chemicals that contain corrosive ingredients, as this can damage the solar panel. Use plain water or water mixed with a small amount of dishwashing liquid to thoroughly clean any stubborn grease or stains on the solar panels. Using hard tools or detergents to clean the panels can damage, crack, or scratch the panels, reducing their ability to absorb light and generate electricity. 3. Check for proper operation. Check that all solar panel connection devices are in working order. Equipment connected to the solar panels, such as the inverter or control box, must be regularly inspected to ensure they are in good condition and ready for use. When Should We Clean Solar Panels? We generally clean during low sunlight hours, in the early morning or evening. 1. In the morning, 7:00 AM - 9:00 AM 2. In the evening, 4:00 PM - 6:00 PM Why should we clean solar panels during these times? Because panels exposed to water while hot can damage the glass surface, creating shadows and affecting electricity production. Furthermore, this prevents the operator from harming the panel. During the morning or evening, solar systems have low electrical currents, and if a broken wire is damaged during the day, it could be dangerous. How often should we clean solar panels? We usually clean solar panels 2-3 times a year, depending on the surrounding environment and how much dust there is. For example, if it's a house, there might not be a lot of dust. Washing the solar panels 2-3 times a year is sufficient. However, if it's a factory, such as a cement factory, which has a lot of dust, the panels might need to be washed more frequently, like once every two months or once a month. Does rain help clean solar panels? Many people may think that rainwater will help clean or wash solar panels. But in reality, after the rain stops, it often leaves dirt on the panels, just like when a wet car gets dusty. The same goes for solar panels. Therefore, we should still wash the panels. We may even wait until the rainy season has passed before cleaning them. Advantages of cleaning solar panels 1. Improves solar panel energy production by up to 20%. 2. Helps solar panels last longer than their stated lifespan. 3. It also checks for damage to solar panels and other connected devices. However, cleaning solar panels should be done by a professional, as it can be dangerous if your roof is steep or difficult to maintain. For more information Tel. 02-292-1067-70 Youtube : Leopump ประเทศไทย Line Official : @775ruust Facebook : LEOpumpThailand TikTok : Leopumpthailand

Vertical Turbine Pumps are available in single-stage or multi-stage impellers with mixed flow or axial flow directions, providing high flow rates and delivery pressures. The main components of the pump include: 1. Bowl Assembly 2. Column Pipe 3. Discharge Head Vertical Turbine Pump can pump liquids from deep wells or pits for firefighting to water used in industrial processes, supplying water to cooling towers in power plants, pumping water for irrigation, and increasing water pressure in municipal pumping systems. Suitable for almost all types of water pumping work. Advantages of Vertical Turbine Pumps 1. Used for pumping liquids from deep wells or reservoirs, these pumps are ideal for urban water supply, agricultural irrigation, and other industrial processes requiring pumping from deep wells. 2. Vertical turbine pumps offer advantages in their design, as they can be tailored to meet specific efficiency requirements. They are available in a variety of materials, including cast iron, stainless steel, and brass, to handle a wide range of liquids, including water, oil, and chemicals. Additional features include adjustable impellers, blower diffusers, and bearings for increased efficiency and performance. How Vertical Turbine Pumps Work 1. Vertical turbine pumps are designed to be submerged in the liquid to be pumped, such as water, oil, or other liquids. The motor or driver that drives the pump is mounted above ground level, while the pump assembly, consisting of impellers and shaft, is submerged beneath the liquid. 2. The shaft is connected to the motor or driver on top. This shaft rotates and has multiple impellers mounted on the shaft. The impeller blades are curved. As the shaft rotates, the impellers also rotate, creating kinetic energy within the surrounding liquid. 3. The bottom of the pump assembly has openings that allow liquid to enter the pump. The rotation of the impeller creates a low pressure near the impeller tip, which draws the surrounding liquid into the pump through these openings. 4. As liquid enters the impeller, the speed increases due to the impeller's rotation. Mechanical energy from the motor or driver is converted into hydraulic energy, which increases the pressure in the liquid. 5. Vertical turbine pumps have multiple parts, consisting of a series of rotors arranged in a row. Each of these pumps increases the pressure in the liquid. As the liquid passes through these rotors, the pressure increases gradually until it reaches a higher pressure at the pump's end. 6. After the liquid passes through all the above-mentioned sections, it is sent to a storage tank, distribution system, or other process equipment, depending on the application. 7. Vertical turbine pumps are known for their efficiency and reliability. They are used in a wide variety of applications, including deep well pumping, water supply, irrigation, oil and gas production, and other industrial processes. Disadvantages of Vertical Turbine Pump Installation is relatively difficult and complex. Vertical turbine pump installation requires careful planning and expertise. Vertical installation requires careful attention to alignment, structural design, and seal management. Everything must be precise to avoid vibration problems or incorrect installation positions, which can affect the efficiency and life of the pump. 2. Pumping Limitations The submerged impeller of a vertical turbine pump requires a positive suction head to operate properly. In some cases, suction head limitations (or NPSHa) can limit pump operation at certain depths. Corrosion Since vertical turbine pumps are exposed to highly corrosive liquids, installing the pump can cause corrosion in the submerged parts. This may require complex designs and corrosion-resistant materials. Maintenance Maintenance of the submerged components of a vertical turbine pump is relatively difficult. Special equipment or maintenance procedures are required, especially for installations in deep wells. Although this type of pump requires less maintenance than other types of pumps and is difficult to install, maintenance is still required. High Cost Vertical turbine pumps can be more expensive than other types of pump systems, depending on the equipment, materials, and construction, as well as installation requirements such as depth, flow rate, and materials used, which affect the cost of the equipment and maintenance. For more inforamtion Tel. 02-292-1067-70 Youtube : Leopump ประเทศไทย Line Official : @775ruust Facebook : LEOpumpThailand TikTok : Leopumpthailand

Water is essential for daily life. Storing water for various uses requires careful calculations that reflect daily water needs and available space. Therefore, let's explore how to calculate water tank size and key factors to consider before purchasing for maximum efficiency and cost-effectiveness. This avoids potential problems, such as insufficient water, or overly large tanks, which can waste both budget and installation space. Furthermore, excessive water retention in the tank can be considered old, susceptible to spoilage or contamination. Things to consider when choosing a water tank : How to choose a water tank that has enough water to use? 1. Number of people using water : On average, one person uses approximately 150-200 liters of water per day, depending on usage patterns such as bathing, laundry, and dishwashing. 2. Water reserve period : Calculate 1-3 days in case of water shortages. For example, a 1 day water reserve would require an average of 150 liters per person x the number of people. Or a 3-day water reserve would require an average of 150 liters per person x the number of people x approximately 3 days. 3. Other water usage scenarios, such as watering plants, would require an average of 50-100 liters per day, or a restaurant would require an average of 500-1,000 liters per day. Water tank size calculation formula The appropriate calculation formula is: Daily water usage × Number of days of water reserve = Water tank size (liters). For a typical residence with 3 residents, average water usage per person: 150 liters/day, and a water reserve requirement of 2 days, the calculation is as follows: 150 liters × 3 residents × 2 days = 900 liters. Therefore, the appropriate water tank size should be 1,000-1,200 liters. For a medium-sized restaurant, the average daily water usage is approximately 1,000 liters and the water reserve requirement is 2 days. The calculation is as follows : 1,000 liters × 2 days = 2,000 liters. Therefore, a water tank with a capacity of 2,000 liters should be selected. Other factors are also important, as discussed in the topic "How to Choose a Water Tank with Sufficient Water" (see "Water Tank Materials"). Water Tank Materials When choosing a water tank, it's important to understand the materials available. For example, PE (Polyethylene) is lightweight, resistant to sunlight, and rust-resistant, while stainless steel is durable. However, it must be of a high quality. Concrete, which is often used in large buildings, can be difficult to install. Water Tank Standards Water tanks should be selected to meet TIS standards. They should be installed in a shaded area or under a covered roof. The tank should be cleaned once or twice a year to prolong its lifespan. Installation Space Is there sufficient installation space, especially if a large water tank is being used? Also, space must be provided for pipes and other accessories. Water Pump System A water pump to boost pressure for smooth operation and prevent water shortages is also important, especially if the water source is lower than the water pump. Careful selection and calculation are also required, as the water pressure will not be delivered as well if the water source is higher than the water source. For more information Tel. 02-292-1067-70 Youtube : Leopump ประเทศไทย Line Official : @775ruust Facebook : LEOpumpThailand TikTok : Leopumpthailand

Centrifugal pumps are popular today because they can be used in a wide variety of applications, including households, commercial buildings, condominiums, schools, hotels, agricultural work, and large-scale industrial applications. Centrifugal pumps also come in many different types. Centrifugal pumps are water pumps that have a pump body that looks like a snail. They are centrifugal pumps that have a working system that uses a rotating impeller to create centrifugal force to pump water. Therefore, choosing the impeller is an important part of choosing a centrifugal pump because the water may contain sediment that can damage the water pump. So let's see how many types of impellers there are in all centrifugal pumps. Centrifugal impeller types 1. Closed Impeller is the most popular type of impeller used with centrifugal pumps. It consists of two steel plates attached to the impeller fins to support the flow of liquid. This type of impeller is only used with centrifugal pumps for clean water. 2. Semi-Open Impeller is a popular type used with centrifugal pumps. It can support viscous liquids. It consists of a steel plate attached to a single impeller fin. This type of impeller is popularly used for pumping liquids that contain solids. 3. Open Impeller is a popular type used with small centrifugal pumps. It has only one fin and no steel plate. It can support larger solids, but has the disadvantage that the impeller can withstand less impact from liquid than the first two types. Therefore, the frequency of the motor rotation must also be reduced to prevent breakage of the impeller. 4. Paper-Stock Impeller is a popular type of impeller used in centrifugal pumps that pump thick liquids. This type of impeller is popularly used in pulp and paper factories. 5. Mix Flow Impeller is a type of impeller that has the characteristics of pushing the liquid in the same direction as the flow into the impeller and the centrifugal force. Overall, the selection of centrifugal pump impellers is quite similar to the principles of water pump selection. However, we must take into account the type and details of the liquid we wish to pump, such as solid particles or various liquids. For more information Tel. 02-292-1067-70 Youtube : Leopump ประเทศไทย Line Official : @775ruust Facebook : LEOpumpThailand TikTok : Leopumpthailand

NPSH or Net Positive Suction Head is the energy or pressure required for the operation of a water pump on the suction side to prevent the liquid from changing state into vapor, which is the main cause of cavitation that damages the water pump. Calculating the correct NPSH value is the most important thing for designing a water pump system to work efficiently, smoothly and durable. So we must get to know what NPSH is? Generally, NPSH values ​​are divided into two values: NPSHa and NPSHr. Why is NPSH Important? Prevent Cavitation: Cavitation causes pump malfunctions, noise, and damage to internal pump components. Choose the Right Pump: Knowing the NPSH value helps select the right pump for your system and application. Pump System Design: Whether its pipes, valves, or other components related to a pump, NPSH should be considered for efficient operation and long-term service. Troubleshooting: If a pump is experiencing problems, checking the NPSH value and improving the piping system may help resolve the issue. NPSH is divided into two main components: 1. NPSHa (Net Positive Suction Head Available): This is the actual pressure the pump will receive from the system. The NPSHa value depends on several factors, such as water level height, air pressure, liquid temperature, and suction line friction. 2. NPSHr (Net Positive Suction Head Required): This is the minimum pressure the pump requires to prevent cavitation. The NPSHr value is specific to each pump and is not subject to change. Choosing the Right Water Pump To ensure efficient and safe water pump operation, select a pump with an NPSHr rating lower than the system's NPSHa. If the NPSHa is lower than the NPSHa, it may be necessary to upgrade the piping system, lower the pump height, or replace it with a lower NPSHr model. NPSH is a very important value when selecting and operating a water pump, especially a centrifugal pump. Understanding NPSH and its influence on NPSH can help us select the right pump and prevent problems that may arise during pump operation. 1. NPSHa (Net Positive Suction Head Available) This is the "actual suction pressure available" at the pump installation point. It reflects the properties of the entire "pipe system" we design and install. NPSHa can vary and is dependent on several factors, such as: Water Level Height: The higher the water level above the pump location, the higher the NPSHa value. Atmospheric Pressure: The higher the elevation above sea level, the lower the atmospheric pressure, resulting in a lower NPSHa value. Liquid Temperature: The hotter the liquid, the greater the pressure required to prevent vaporization (lower NPSHa). Suction Pipe Friction: Long, small, or elbowed suction pipes create resistance and lower NPSHa. 2. NPSHr (Net Positive Suction Head Required) This is the "minimum suction pressure required by the pump" to prevent cavitation. It is a constant value specific to each pump model. It is determined by the manufacturer's design and cannot be changed. NPSHr can be viewed on the Performance Curve of that pump model. Important: NPSHa must be greater than NPSHr. The design of the water pump system requires that the NPSHa value be greater than the NPSHr, and a safety margin of at least 0.5 to 1 meter should be provided. What happens if the NPSHa value is less than the NPSHr? If the system pressure with the NPSHa value is lower than the required pump pressure (NPSHr), severe cavitation will occur. This will result in: The pump will not draw water or deliver very little water. Noise and vibration of the pump body. Corrosion of the impeller and pump housing can occur, leading to significant damage. NPSH Values ​​You Need to Know Before Installing a Water Pump NPSH (Net Positive Suction Head) is an extremely important value for centrifugal pump installers. This is because centrifugal pumps often experience problems with poor suction, vibration, or noise, or lower than expected pump performance. All of these factors are related to NPSH. NPSHa, or Net Positive Suction Head Available, is a value that varies depending on the centrifugal pump installation and pipe size. The larger the pipe size, the higher the NPSHa value. NPSHr, or Net Positive Suction Head Required, is a measure of the pump's suction performance. It is the minimum pressure required at a specified flow rate and rated speed of the selected pump to prevent cavitation. This value is determined by the pump manufacturer and cannot be changed. Precautions for cavitation in centrifugal pumps Cavitation is a reaction that gradually turns water into vapor, creating low-pressure vacuum bubbles that burst, generating shocks that can corrode and damage the impeller material. This also reduces the efficiency of water flow. If the calculated NPSH value is greater than NPSHr. For more information Tel. 02-292-1067-70 Youtube : Leopump ประเทศไทย Line Official : @775ruust Facebook : LEOpumpThailand TikTok : Leopumpthailand