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Among many types of water pumps, self-priming pumps have attracted considerable attention for their unique performance. Today, let's delve deeper into the working principles and significant advantages of self-priming pumps.   Working Principle:   First, let's understand the working principle of a self-priming pump. The key to a self-priming pump's ability to self-prime liquid lies in its unique structural design. When the pump starts, a portion of the liquid stored in the pump body rotates with the impeller, forming a liquid ring. Centrifugal force propels the liquid around the impeller toward the outer edge, creating a low-pressure area. Simultaneously, a vacuum is created at the center of the impeller as the liquid is ejected. Atmospheric pressure forces the liquid in the suction pipe into the pump, enabling self-priming. As the pump continues to operate, liquid is continuously drawn in and out, creating a steady flow. Self-priming Pump Working Principle Diagram:     Advantages of Self-priming Pumps:   1. Strong self-priming capability: No prior priming is required, enabling quick startup and self-priming, saving time and manpower. 2. Easy operation: Easy startup, no complex preparation required, and suitable for a variety of operating conditions. ⒊ Wide Adaptability: Able to handle liquids containing gas or vapor, with good adaptability to liquids of varying properties. ⒋ Flexible Installation: Unrestricted by mounting location, it can be installed horizontally, vertically, or at an angle to meet various site requirements. ⒌ Low Maintenance Cost: Relatively simple structure and few parts make maintenance and repair relatively easy, reducing long-term operating costs. ⒍ High Energy Efficiency: During operation, it effectively utilizes energy, improving efficiency and reducing energy consumption.   Summary:   With its unique principle and numerous advantages, self-priming pumps play an important role in numerous fields, including agricultural irrigation, industrial drainage, and municipal water supply. We believe that with continuous technological advancement, self-priming pumps will demonstrate even greater performance and a wider range of applications in the future.

Adaptive N impeller helps small sewage pumps solve clogging problems   Clogging is a common problem in wastewater pumping, especially for smaller pumps due to their limited hydraulic space and lower torque. The consequences of clogging include increased energy consumption, additional maintenance, and emergency repairs, all of which lead to higher operating costs. Wastewater pump manufacturers are constantly developing better hydraulic designs to reduce clogging while maintaining high performance.   The Adaptive N Technology hydraulic design, an evolution of the self-cleaning N-type hydraulic design, is designed to address the challenges of anti-clogging in smaller pumps. It provides significant improvements in pump system reliability while reducing energy consumption and unplanned maintenance costs.   The Adaptive N impeller pump can be installed in wastewater pumping stations with or without screens, and is used to pump wastewater from homes, commercial buildings, hospitals, schools, and other locations. It can also be used in industrial wastewater and stormwater applications to transport wastewater that may contain solids, fibers, and other types of impurities.   A Flygt Concertor 6020 pump with Adaptive N technology installed in a municipal wastewater pumping station.     Pumps Designed for Today's Wastewater Conditions   Since the early 20th century, pump designers have focused on reducing clogging by increasing flow rates. In mining, industrial, and raw water pumping applications, hard solids and spherical objects in the pumped medium are the most common clogging problems. Large impeller passages make it easier for these objects to pass through the pump. While conventional wastewater pumps are designed with large flow passages to avoid clogging, this has proven suboptimal for most wastewater applications.   At the same time, the risks posed by soft and fibrous objects—the most common solids in municipal wastewater—have been largely overlooked.   Detailed surveys and studies of modern wastewater indicate that wastewater almost never contains hard, spherical objects with a diameter as large as the internal diameter of the pipe system. Even when such objects enter the wastewater system, they typically settle or accumulate in areas of lower flow velocity, never reaching the pump.   A significant concern: Today's wastewater contains a higher proportion of soft objects. Examples include the growing variety of household and personal hygiene items, including paper towels, wet wipes, rags, dishcloths, and other fibrous objects. While much of this material should be disposed of as trash, many consumers flush it down the toilet. As a result, more fibrous, non-biodegradable material appears in the wastewater, further challenging the pump’s performance.   Figure 1: Likelihood of finding various types of solids in wastewater   Figure 1 is a conceptual illustration of the likelihood of finding different types of solids in wastewater. Hard, nearly spherical objects are on the left, while soft, elongated objects are on the right. As with many systems, the probability of finding very large objects (whether spherical or elongated) is very low. An important feature is that the distribution curve is asymmetric—it favors soft, elongated objects, which are the most common types found in wastewater today.   Soft vs. Hard Blockage   Research has shown that blockage problems are primarily caused by fibrous debris, which tends to become entangled around the leading edges of conventional impellers. The fibers wrap around these leading edges and fold over the sides of the blades. On straight and moderately curved leading edges, debris does not break off; instead, it continues to accumulate. This accumulation forms large clumps of solid material (sometimes called "cloth clumps"), which can lead to blockage.   As debris gradually accumulates around the leading edge of the impeller, the free path for water flow decreases, and pump performance degrades. This phenomenon is called soft blockage because it does not cause the pump to stop. The pump will continue to operate, but performance will be reduced to a certain degree. A typical effect of soft blockage is that the pump needs to run longer to pump a given volume of wastewater. A soft-blocked pump is also less efficient than an unblocked pump. Consequently, soft blockage increases energy consumption. Another consequence of soft blockage is increased vibration levels, which can accelerate wear on seals and bearings.   Small foreign matter can also become lodged between the volute and impeller, causing additional friction. The motor needs to provide greater torque to offset the braking effect, thus requiring higher input power. Once the operating current exceeds the trip current (causing the motor to overload), the pump stops operating. This is called a hard jam. A hard jam can also occur when a soft jam forms a noticeable mass. The primary impact of a hard jam is downtime and the need for unplanned repair services to clear the jam and restart the pump, increasing operating costs.   Dispelling Myths About Throughput Size   Decades of R&D experience, combined with hundreds of thousands of pump installations, have shown that focusing solely on throughput size is incorrect and misleading. Yet, it remains prevalent in wastewater pump purchasing specifications. User feedback and laboratory testing of conventional impellers have yielded the following results:   Channel Hydraulics' Anti-Clogging Performance   Channel impellers are single- or multi-blade, closed-circuit centrifugal impellers with large throughput sizes. They are highly efficient when pumping clear water but are susceptible to clogging when pumping wastewater.   Figure 2: Example of a Single-Blade Impeller   Channel hydraulics are designed to achieve optimal clogging resistance at the pump's best efficiency point (BEP). Therefore, clogging resistance decreases as the operating point moves further from the BEP. The gradual accumulation of fibrous material on the leading edge (Figure 3) will cause pump efficiency to fall far below the factory-tested clear water value—a typical effect of soft clogging.   This design induces significant radial loads over long-term operation, placing greater stress on the shaft and bearings, increasing vibration and noise. Since the impeller can never be perfectly balanced, vibration is further exacerbated.   These problems ultimately lead to increased energy consumption, excessive wear, and shortened pump life.   Figure 3: Clogging in a Channel Impeller   Clog Resistance of Vortex Hydraulics   Vortex impellers are located at a distance from the pump casing, providing ample volute space, but are inefficient when pumping both clean and dirty water.   Pump designers assumed: • The rotating impeller would create a strong vortex within the volute, pumping out the liquid and any debris. • The vortex impeller would operate like a torque converter, transferring energy from the impeller to the pumped medium with little or no fluid exchange. • Because the impeller is outside the fluid flow path, objects never come into contact with the impeller, and the pump would not clog.   Figure 4: Example of a Vortex Impeller   However, vortex impellers function like other centrifugal impellers, meaning energy is transferred to the medium via the impeller blades. Therefore, multi-blade vortex impellers are very sensitive to soft clogging of the hub and leading edge. Its fluid dynamics (flow pattern and pressure distribution) can cause soft materials to accumulate on the impeller surfaces, further reducing the already low hydraulic efficiency.   Furthermore, vortex pumps often experience a large accumulation of solids in the volute, causing additional losses, increased power consumption, and ultimately leading to motor overload and pump shutdown.   Figure 5: Blockage in a vortex impeller   Anti-clogging of Modern Self-Cleaning Hydraulics   Research and investigations have shown that clogging problems are primarily related to the pump's difficulty discharging fibrous debris entangled on the impeller's leading edge. The N-type impeller features a state-of-the-art self-cleaning design developed in response to these findings. With a sharply swept horizontal leading edge and a relief groove, the N-type hydraulic design has proven to be a solution to most clogging issues. Furthermore, without the need for large flow passages, the impeller can be designed with multiple blades, which helps reduce radial forces, improve balance, and increase efficiency.   Figure 6 shows the clogging probability of the N-type impeller, which is significantly lower than that of conventional impellers designed around large flow dimensions.   Figure 6: Clogging in a Self-Cleaning N-Type Impeller Figure 7: Self-Cleaning N-Technology Hydraulic Design   Figure 7 illustrates the N-type hydraulic design, which consists of a semi-open N-type impeller and an insert ring with guide pins.   The self-cleaning technology works as follows: 1. The N-type impeller blades, with their swept horizontal leading edges, achieve self-cleaning by sweeping solids from the center of the insert ring to the outer edge. 2. Unloading grooves in the insert ring work together with the horizontal leading edge to guide solids out of the impeller. 3. In smaller geometries, specially designed guide pins capture any fibers lodged near the impeller hub and allow the blades to push them out of the pump along the unloading grooves.   Thanks to its ability to expel hard objects, self-cleaning technology significantly reduces unscheduled maintenance and improves reliability. By preventing fibrous objects from tangling around the leading edge and causing soft plugging, the N-type impeller ensures sustained high efficiency over the long term, thereby reducing energy consumption.   Unlike channel hydraulics, the self-cleaning N-type hydraulic's anti-plugging properties are mechanically based and unaffected by flow rate variations. Therefore, the pump can operate efficiently at different points along the performance curve and, most importantly, with high reliability at a wide range of frequencies. Pairing the N-type hydraulic design with a variable frequency drive (VFD) enables better process control, energy savings, smoother operation, and reduced maintenance costs.   Development of the Self-Cleaning N-Type Hydraulic Design   Limited Torque in Small Pumps   Submersible pumps are typically driven by an electric motor that is closely coupled to the pump impeller, as shown in Figure 8. When the pump starts, current flows into the stator windings, generating a rotating magnetic field that rotates the rotor via the shaft. Consequently, the motor generates torque proportional to the motor power. Torque is a physical quantity that defines the tendency of a force to rotate an object about an axis or point.   Figure 8: Torque Schematic   As previously mentioned, objects passing through the self-cleaning N pump are pushed along the unloading groove. Because the gap between the impeller blades and the insert ring is very small, only a few tenths of a millimeter, large debris is forced through the unloading groove. When this occurs, additional friction is generated, braking the impeller and slowing it down. The pump must provide additional torque to overcome this additional friction, which means higher motor torque is required. If the maximum motor torque is insufficient, debris will become stuck and the pump will stop. This is known as a hard jam.   Because motors used in submersible wastewater pumps are typically not significantly overrated, the maximum torque available at full power may not be sufficient to dislodge even the toughest debris. This is particularly true for smaller pumps, which often have relatively low torque margins. To further enhance the functionality of smaller N pumps, Flygt has developed Adaptive N technology to reduce the risk of hard jams caused by insufficient torque.   Adaptive N Technology   With Adaptive N technology, the N-type impeller is not completely fixed to the shaft: it can move axially up and down in response to the pressure differential created by large debris trying to pass through the pump. This movement temporarily increases the clearance between the impeller blades and the inlay ring. This allows even the largest pieces of cloth and the toughest debris to pass through the pump without requiring additional motor torque. This advantage is even more pronounced when the pump motor is operating on single-phase power, where available torque is further reduced.   Figure 9: Position of the Adaptive N Impeller During Operation   As shown on the left side of Figure 9, in most conditions, the Adaptive N impeller operates exactly like a conventional N-type impeller. However, when necessary, the impeller moves upward to pass larger debris, as shown on the right side of Figure 9.   The adaptive mechanism operates by exploiting the hydraulic pressure differential across the impeller. The pressure-dependent force is F=PxA, where P is the pressure and A is the area over which the pressure acts. Figure 10 shows how the combined forces determine the impeller's position.   The left side of Figure 10 is a conceptual image of the hydraulic pressure distributed across the impeller in lightly contaminated wastewater. At the base of the impeller, upward pressure increases with radius, so the force increases from the center of the impeller toward the edge. Meanwhile, at the top of the impeller, higher pressure acts evenly across the entire impeller disk. The net force acting on the impeller has a downward net value, maintaining the impeller in its normal operating position.   Figure 10: Force distribution during normal operation (left) and when a large piece of debris enters the pump (right)   When a large piece of debris enters the impeller, the force balance differs from normal operation. As shown on the right side of Figure 10, at the base of the impeller, a gradually increasing upward force is added to the hydraulic force. When the upward force exceeds the downward force, the impeller begins to move upward, and the gap between the impeller and the insert increases. When the gap is sufficiently wide, the debris passes through the impeller. The upward force then decreases, and the impeller returns to its original operating position.   Because this adaptive motion lasts only a fraction of a second, the momentary power increase has no significant impact on the overall efficiency of the pump. This adaptive feature also reduces loads on the shaft, seals, and bearings, thereby extending their service life.   In summary, Adaptive N technology significantly improves the self-cleaning capabilities of small pumps equipped with low-torque motors. Ultimately, reliable operation and consistently high efficiency reduce total cost of ownership.   Note: While there is a spring in the impeller hub, it is not related to the adaptive function. This spring keeps the impeller locked during assembly and shipping, preventing damage that could occur before installation.   Life Cycle Cost (LCC) Analysis for Small Wastewater Pumps   Life Cycle Cost (LCC) analysis is a methodology used to determine the total cost of a system over its lifecycle or to compare investment plans. A complete LCC analysis of any equipment includes all costs associated with the equipment, including initial investment, installation, operation, energy, downtime, environmental, maintenance, and disposal. The most significant components of the calculation will depend on the application, location, labor costs, and energy costs—factors that can vary significantly between markets.   A simplified analysis is often used when evaluating wastewater pump options. In this case, the most relevant factors are initial investment, energy costs, and maintenance costs (especially unplanned maintenance). Other factors can be excluded from the analysis.   Blockage is the most significant factor in unplanned maintenance costs. The number of times a pump blocks in a pumping station can vary significantly. The most common factors are: • Type of pumped medium • Type of pump hydraulic design • Length of pump operating cycle • Pump size • Motor torque and moment of inertia • Performance of routine maintenance   Increased energy costs due to soft clogging   As mentioned above, channel impeller pumps used in wastewater applications can suffer from soft clogging and may trip after a long operating cycle. However, vortex impeller pumps experiencing soft clogging may continue to operate due to the larger volume within the pump casing. This larger volume allows for greater accumulation of solids compared to other impeller types. In either case, soft clogging tends to reduce pump efficiency and induce hard clogging.   Figure 11 shows the impact of soft clogging on the efficiency and energy consumption of a conventional pump (channel or vortex hydraulic design) and a self-cleaning pump (N-type or Adaptive N Technology hydraulic design) over time.   As shown in Figure 11a, when the conventional pump is operated continuously in wastewater, its efficiency decreases and its energy consumption gradually increases. The same trend is observed when the conventional pump is operated intermittently (Figure 11b), even though backwashing can temporarily improve efficiency. In contrast, Figure 11c shows that the self-cleaning pump maintains consistent efficiency and energy consumption during continuous or intermittent operation in wastewater, resulting in the lowest energy consumption over time.   The increased energy costs due to soft clogging are easily measured on-site. However, predicting these additional costs is difficult due to variability in media properties and operating cycles.   Figure 11: Comparison of conventional pump performance and self-cleaning N-technology wastewater pump performance under two different operating scenarios   Simplified LCC Comparison Example   The following example provides a simplified LCC analysis comparing the costs of three pump types under short and long daily operating hours: Application and pumping details   pumping medium Raw sewage for grid   Flow 25 Liters/second   Lift 8 Meters   Years of operation 5 Years   Energy cost* 0.1 EUR/kWh   Unplanned maintenance costs 200 Euros/service   Pump selection Channel type impeller Vortex impeller Adaptive N impeller   Rated power(kW) 3.1 4.7 3.1   Hydraulic efficiency (clean water)** 75% 46% 77%   Total efficiency (clean water)** 63% 38% 65%   Specific energy consumption (kWh/m³)** 0.0346 0.0574 0.0335   Service times/year Run 3 hours/day 4 2 0.5   Run 12 hours/day 16 8 2   *Energy costs can vary significantly by country. **Efficiency and specific energy consumption data are based on Flygt pump performance curves.   In this example, the initial investment for the different hydraulic designs does not vary significantly. Over long operating cycles, the initial investment represents only a small fraction of the LCC. Furthermore, planned maintenance costs will be roughly the same across the various pump options. Meanwhile, unplanned maintenance costs due to hard clogging will have a greater impact on the LCC.   When a channel impeller pump is operated 12 hours per day for five years (Figure 14), its unplanned maintenance costs exceed five times the initial investment. In contrast, the Adaptive N-type impeller pump's maintenance costs are only 60% of its initial investment. While vortex impeller pumps are expected to require fewer services than channel impeller pumps, their lower efficiency than other hydraulic designs will result in higher energy costs. This does not even take into account the additional energy costs caused by soft clogging, which is difficult to predict and therefore not included in the LCC calculation or these charts. Taking this into account, the vortex hydraulic pump will have higher energy consumption than the other two hydraulic designs.   Whether operating 3 or 12 hours per day (Figures 13 and 14), the Adaptive N-type impeller pump has the lowest lifecycle cost in wastewater applications because it minimizes unplanned maintenance. If the additional energy costs caused by soft clogging are taken into account, the savings of the Adaptive N-type impeller pump are even greater than those shown in the LCC analysis. In addition to the economic benefits, the N-type pump provides a worry-free operation experience for the end user.   Figure 12: Example of a wet-well pumping station equipped with two small sewage pumps Figure 13: Simplified LCC analysis based on 3 hours of daily operation for 5 years Figure 14: Simplified LCC analysis based on 12 hours of daily operation for 5 years   Summary   The increasing focus on minimizing operating costs, particularly in sewage applications, has driven the demand for pumps with improved clogging resistance and higher efficiency. Twenty-five years ago, Flygt developed a self-cleaning hydraulic design to address this issue. The semi-open N-type impeller, featuring a swept horizontal leading edge and unloading grooves, significantly reduces the risk of clogging. Compared to traditional hydraulic designs, the N-type pump offers consistently high efficiency and improved reliability. As a result, the self-cleaning N-type pump has become popular worldwide.   Due to the limited size and motor torque of small sewage pumps, implementing N-type technology in the most challenging applications has been challenging. To further enhance the self-cleaning function, particularly to reduce the risk of hard clogging in relatively low-torque pumps, the N-type impeller incorporates adaptive technology. The adaptive N-type hydraulic design allows the impeller to move axially, allowing even the toughest debris to pass through. Extensive laboratory and field testing demonstrates that the Adaptive N technology hydraulic design effectively addresses both soft and hard clogging issues in small pumps.   Furthermore, LCC analysis demonstrates significant cost-saving potential for Adaptive N impeller pumps. In most cases, these savings come from lower energy consumption and reduced unplanned maintenance costs.

From the Wuyue Hydropower Station to the Yarlung Zangbo River, the "pumping power" behind China's pumped storage   1. The largest mega-hydropower project in human history   In recent months, the Yarlung Zangbo River Lower Reaches Hydropower Project, the largest hydropower project in human history, officially commenced. With a total investment exceeding 1.2 trillion yuan, this mega-project plans to build five cascade hydropower stations with a total installed capacity of 60 to 81 million kilowatts, equivalent to more than three times the size of the Three Gorges Dam. The project is expected to generate 300 billion kilowatt-hours of electricity annually, enough to meet the electricity needs of 300 million people.     This is not only a milestone in the history of global hydropower construction, but also a key measure for my country to promote ecological civilization and ensure clean energy security. "Open ditches and canals, return them to the great rivers, and drain stagnant water." The Chinese nation's respect for, compliance with, and protection of water have nurtured an ecological concept of harmony and symbiosis through millennia of water management and use. Today, this concept is quietly revitalizing hydropower construction. In this green and surging energy revolution, water pump equipment is playing an irreplaceable and core role as a key auxiliary system.   2. What is pumped storage? Why is a pump necessary?   A pumped-storage power station is a special form of hydropower station, equivalent to a "super battery" for the power grid. Its operating principle embodies the wisdom of "peak shaving and valley filling, and adapting to changing circumstances."By utilizing surplus electricity during low-demand periods to pump water to the upper reservoir, this system accumulates potential for later use. During peak demand periods, this energy is released to generate power, transforming potential into energy. This ingeniously achieves the temporal and spatial shifting of electrical energy and the stable regulation of the grid frequency.   In this energy storage and discharge cycle, the water pumping equipment becomes the most critical kinetic energy conversion device. Like the human body's "heart system," it performs critical functions such as technical water supply, maintenance drainage, and leak removal. Its performance is directly related to the operational efficiency and safety of the entire power station.   In fact, in addition to super projects such as the Yarlung Zangbo River, pumped-storage power stations, as the "voltage stabilizer" and "regulator" of the power system, are being accelerated across the country and have become an indispensable core component of the new power system.The national target for pumped storage capacity is projected to exceed 62GW by 2025, and to exceed 120GW by 2030. Currently, there are 678 planned pumped storage projects under construction nationwide, with a total investment exceeding 70 trillion yuan. The Henan Wuyue Pumped Storage Power Station, a major, one-million-kilowatt project approved by the National Energy Administration and shared today, is a crucial component of this national strategic plan.   3. Henan Wuyue Pumped Storage Power Station:     Located in the Central Plains, storing energy from the mountains and waters   The Henan Wuyue Pumped Storage Power Station is a key project in Henan Province's "13th Five-Year Plan" energy development plan and power development plan. It is also a key energy project approved by the State Council to revitalize the old revolutionary base area of ​​Dabie Mountains. The total installed capacity is 1 million kilowatts. After the power station is fully put into operation, it can save the system's thermal power coal consumption by 116,800 tons each year, which is equivalent to reducing carbon dioxide emissions by about 291,400 tons each year. It is of great significance to the construction of the power grid regulation capacity in central China.     As of now, three units of Wuyue Pumped Storage Power Station have been put into operation to generate electricity.In this major project, Leo Pump Industry provided technical water supply equipment, maintenance drainage and flow channel water filling systems, leakage drainage systems and other related pump equipment (including GSX high-efficiency single-stage double-suction horizontal centrifugal pumps, NLG vertical pipeline centrifugal pumps, NDX single-stage end-suction cantilever horizontal centrifugal pumps, GLC vertical long-axis pumps, WQ series submersible sewage pumps, and D series horizontal multi-stage centrifugal pumps).     Among them, the GSX250-390 high-efficiency, single-stage, double-suction horizontal centrifugal pump, awarded the China Energy Conservation Certification, features a double-suction design with a flow rate of 1200 m³/h and a head of 40 m. It boasts a wide range of models, excellent hydraulic performance, and a novel structure, offering high efficiency and reliability, low NPSH, and low maintenance. This product, which has been awarded the "Second Prize for National Science and Technology Progress," has demonstrated outstanding performance in major projects such as the Shenhua Guohua Qingyuan Power Generation Project, the Huaneng Dalat Power Plant, and the State Energy Group Yueyang Power Generation Company.   4. Solid Core Capabilities Support Major Projects   The Wuyue Pumped Storage Power Station is a prime example of the localization of China's entire high-end equipment manufacturing industry chain. The vast majority of its core equipment and construction materials, including Leo, are sourced from domestic companies, demonstrating that China's independent R&D, design, and manufacturing capabilities for pumped storage power stations have reached world-leading levels. Harbin Electric Power Group, supplier of the core main equipment, undertook the design, manufacturing, installation, and commissioning of all core components, from the runner, main shaft, and generator rotor. TBEA Shenyang Transformer Co., Ltd., supplier of the 500kV main transformer, undertakes the critical task of boosting the generator's electricity and transmitting it to the grid. Pinggao Group, a leading domestic high-voltage switchgear company, provided a complete set of 500kV GIS equipment. Its high reliability and compact design ensure the safe and stable grid connection of the power station.   In addition to traditional pumping equipment, with the deepening implementation of the national "dual carbon" strategy and the rapid development of the pumped storage industry, smart pump health systems are becoming increasingly important for the safe and stable operation of pumped storage power stations. Examples include Leo Pump's smart pump health monitoring system, Taiji Co., Ltd.'s smart pump cluster system, and Kenfulai's KICS intelligent cloud platform.   In addition to the Wuyue Pumped Storage Power Station, many large-scale, important water conservancy projects for public welfare in China, such as the South-to-North Water Diversion Project, the Yangtze-Huaihe River Diversion Project, the Central Yunnan Water Diversion Project, and projects by the five major energy investment companies, have attracted a group of Chinese manufacturing companies with extensive project experience.   5. Promoting China's Hydropower Development with Flowing Wisdom   "Guiding the river, piling up stones, it reaches the Dragon Gate." Ancient Chinese wisdom in water management transcends time and space, finding new life in hydropower development millennia later. With the deepening of the "Dual Carbon" strategy and the advancement of the Yarlung Zangbo River project, China's pumped storage industry is entering a golden period of development. Amidst this monumental energy transition, a group of domestic manufacturers are injecting powerful momentum into this vital national infrastructure with their exceptional technical prowess and reliable product quality.   Rivers surge, and the times march forward. As the Book of Changes says, "Nothing nourishes all things like water." We have reason to believe that this flowing wisdom will inject inexhaustible impetus into the green development of the Chinese nation and contribute significantly to building a beautiful China.

  Etanorm sets the standard for all-round performance   Being a model is no easy task. Being a model means maintaining peak performance and continuous improvement, as KSB's Eta series pumps embody. The series' origins date back to 1935/36, and since its launch, over 2.7 million units have been sold worldwide, making it the most successful standardized water pump in the global market.   The Eta series' success is primarily due to its diverse range of variants and applications. The Eta portfolio includes standardized water pumps with conventional seals in a wide variety of designs, including variable-speed models and leak-free variants. The Etanorm series offers ideal solutions for a wide range of applications.   In the mid-1930s, KSB decided to explore a new path. At that time, the young Dr. Fritz Krisam, who later became Head of KSB's Design/Engineering Department, consolidated KSB's then-complex single-stage centrifugal pumps into a single, unified series. He named it after the Greek letter Eta (η), which stands for efficiency in engineering.   Etanorm: “Norm” (derived from the English word norm, meaning “standard”) emphasizes its standardized design (compliant with EN 733) to ensure consistent performance across a wide range of applications.   This new pump series lived up to its reputation and set a benchmark for efficiency. In the early 1950s, the Eta series underwent a technological evolution, again with increased efficiency as its primary goal. The next generation, released in 1968, also maintained this focus.   In the 1970s, the selection chart for this series became the basis for new pump standards and a reference for many international manufacturers. Based on the EN 733 standard for 10 bar pumps, KSB named this successful series Etanorm—"norm" comes from the German/English word for "standard." Since then, Etanorm has become the world's best-selling standardized pump.   Eta Family History     1935   KSB launches the Eta series—energy-efficient single-stage pumps designed for industrial applications.     1968   The standardized Etanorm series is launched, combining standardization, high efficiency, and high reliability.     2017   The first Etanorm equipped with the MyFlowDrive 1 drive system is launched.     2023   The EtaLine Pro series is launched, combining extreme efficiency, unprecedented flexibility, and sustainable production.   The word "standardized" in "standardized pumps" can be somewhat misleading. In fact, the Etanorm series boasts one of the most diverse pump variants. The average order batch size for all pumps sold in this series is approximately 1.4. This wide selection of sizes and materials ensures that customers receive the pump that best suits their specific application. By tailoring the impeller to the operating point, low-wear operation is also guaranteed.   For this classic product that has already demonstrated excellence in energy consumption, reliability, and durability, the challenge facing our R&D team began with a simple question: How can we set a new benchmark again? After repeated discussions, two key factors prompted us to further innovate and optimize the technology of Etanorm.   Hydraulic Modeling is Key to Efficiency   A pump's hydraulic model is central to ensuring high efficiency and low energy consumption. The Etanorm consistently delivers outstanding performance thanks to its optimized hydraulic model. Its extensive selection chart almost always allows users to select a model operating close to its optimal efficiency point. In addition to optimized hydraulics and impeller cutting, variable speed operation combined with a highly efficient drive system significantly contributes to lower energy and operating costs.   1955: The first automated production line for Eta components Opening in Frankenthal   The Etanorm offers 62 sizes. To hydraulically optimize each size, we utilize advanced tools such as the Finite Element Method (FEM) and Computational Fluid Dynamics (CFD) to construct hydraulic profiles, which are then validated through comprehensive testing.   Although the Etanorm is a classic clean water pump and is not typically used for conveying media containing abrasive particles, given the increasing prevalence of solids in these applications, we have designed its shaft seal chamber to be more tolerant of solids-laden media than previous versions. At the same time, in order to make the water pump better adapt to the fluid being transported, users can choose different materials for the pump casing, impeller and mechanical seal.   Virtual Impeller Trimming for Maximum Flexibility   The next evolution of Etanorm is its integration with the Industry 4.0-compatible MyFlowDrive 2 drive system. This "virtual impeller trimming" feature allows users to independently set a desired fixed speed on the motor. The pump's flow rate can be easily increased or decreased at any time, providing users with a high degree of reliability and flexibility. Traditional fixed-speed pumps often have their impellers trimmed during manufacturing to match the design flow rate and head. This model requires significant time and effort to adjust later. Because the synchronous motor's supply voltage is modulated by the motor's integrated frequency converter, it can be connected to virtually any power grid worldwide. This is a significant advantage for global general contractors: they no longer need to consider local grid voltage when selecting a pump.   With its broad selection and extensive material and seal options, Etanorm remains the preferred choice for efficient and economical fluid transport in numerous industries and applications.   Investing in a Modernized Eta Production Line   To ensure the future competitiveness of the Frankenthal site, KSB is comprehensively modernizing its Eta production facilities according to the latest technology and energy standards, with completion scheduled for 2029. Starting in 2026, the Eta production facility at the Frankenthal headquarters will be expanded into a European competence center for the latest generation of electronically controlled pumps. KSB will invest approximately €70 million in this project over the next few years—one of the largest single investments in the company's history.   The new building will provide ample space for the reorganization of machining, assembly, and logistics areas, and the existing production hall will be fully renovated and reused. The energy-efficient production renovation also includes connecting the drying system in the new paint shop to the district heating network of the headquarters' new heating station and installing a photovoltaic system on the roof. KSB already produces the next generation of energy-efficient EtaLine Pro water pumps for the building services sector, manufactured using sustainable methods, at the Eta production site in Frankenthal.   A live view of KSB's Eta production line in Shanghai   This global modernization strategy has also extended to China. Construction is currently underway at KSB's new Eta production line in Shanghai. Installation of the automated high-bay warehouse is nearly halfway complete, and the production line is undergoing final adjustments and construction.     Meanwhile, pre-acceptance of the production line's hardware has been successfully completed, and the equipment is about to be delivered to site, heralding a new level of localized production capacity for KSB in China.     Founded in Frankenthal, Germany in 1871, the KSB Group has grown over 150 years to become a world-leading supplier of pumps, valves, and services. Adhering to its brand philosophy of "Solutions. For Life," the Group employs over 16,000 people worldwide and operates in over 100 countries.

Exploring the Working Principle of a Double-Suction Pump The operating principle of a double-suction pump is based on centrifugal force, much like the water in a bucket tethered to a rope spinning rapidly. A double-suction pump primarily consists of an impeller, pump casing, and shaft. When the pump is started, the motor drives the pump shaft and impeller into high-speed rotation. The impeller acts like a high-speed "stirrer," spinning the liquid pre-filled between the blades.   Under the influence of centrifugal force, the liquid is propelled by an invisible force, flowing from the center of the impeller outward. This creates a low-pressure area at the center of the impeller, acting like a "suction trap." The pressure difference between the liquid level and the impeller center causes the liquid in the tank to be drawn into this low-pressure area—the impeller center. Because a double-suction pump has two suction ports, liquid can enter the impeller evenly from both directions, significantly reducing resistance in the inlet piping and improving suction efficiency.   As the impeller rotates continuously, liquid is constantly flung from its center to its periphery. This process seems to energize the liquid, increasing both its static pressure and flow rate. As the liquid leaves the impeller and enters the pump casing, the flow path within the casing gradually widens, slowing the flow rate. Much like a high-speed car entering a wide avenue, its speed slows, and some of the kinetic energy is converted into static pressure, further increasing the liquid pressure. The continuous rotation of the impeller causes the liquid to be continuously drawn in and out, creating a steady flow within the double-suction pump. Ultimately, the high-pressure liquid flows tangentially into the discharge pipe and is delivered to where it's needed.     Advantages of Double-Suction Pumps (1) High Flow: Double efficiency, powerful power (2) Smooth Operation: Symmetrical structure, stable operation (3) Easy Maintenance: Horizontal center opening, easy maintenance (4) High Efficiency and Energy Saving: Optimized design, reduced energy consumption   Disadvantages of Double-Suction Pumps (1) Low NPSH, affecting efficiency (2) Ring leakage, affecting operation (3) Large Footprint: Large size, requiring a lot of space   Double-suction pumps, with their significant advantages such as high flow, stable operation, easy maintenance, and high energy efficiency, play an irreplaceable role in numerous fields, including urban water supply, industrial production, hydraulic engineering, and fire protection systems. However, they also have drawbacks such as low NPSH, prone to ring leakage, and large footprint. In practical applications, it is necessary to comprehensively consider the advantages and disadvantages of double-suction pumps based on specific working conditions and make appropriate selections and use.   With the continuous advancement of technology, double-suction pumps have broad prospects for technological innovation and application expansion. We believe that in the future, double-suction pumps will continue to be optimized and upgraded, providing higher-quality and more efficient services for our production and daily lives.  

  Determining Flow and Head Requirements   When selecting a mixed flow pump, determining flow and head requirements is a critical first step. Flow is like the "volume" of water flowing through a pipe, determining how much water the pump can deliver per unit time; head is like the "height scale" of water being lifted, indicating the vertical height the pump can lift water.   Determining flow requirements depends on the specific application scenario. For example, in agricultural irrigation, the required water volume needs to be estimated based on the irrigated area, crop type, and growth stage. For example, rice fields require a high water demand during the peak growing season, so it's important to accurately calculate the number of cubic meters of water required per hour to ensure healthy growth. For urban drainage, factors such as the city's area, rainfall, and drainage time requirements must be considered. For example, suppose a certain area in a city covers 10 square kilometers. Based on historical rainfall data, rainfall reaches 50 mm per hour during heavy rain. The total hourly rainfall in that area needs to be calculated to determine the required flow rate for the mixed flow pump. Calculating head requirements is equally important. For example, when drawing water from a river to supply a city, the vertical height difference between the water intake point and the city's water supply point, as well as the energy losses in the pipe, must be considered. For example, if the vertical height difference between the water intake point and the city's water supply point is 20 meters, and the pipe is 5 kilometers long, estimate the longitudinal and local resistance losses in the pipe based on the pipe's material and diameter. Assuming the longitudinal resistance loss is 5 meters and the local resistance loss is 3 meters, the total required head is 20 + 5 + 3 = 28 meters.   Inaccurate calculations of flow rate and head can lead to a series of problems. Choosing a too low flow rate is like using a faucet with too little water, failing to meet actual water demand and potentially causing production halts in industrial operations. Choosing a too high flow rate not only wastes energy but also increases equipment costs, like using a large pipe to connect a small bucket, resulting in a waste of resources. If the lift is too low, the water won't be lifted to the required height. For example, in high-rise water supply, insufficient lift won't allow water to reach residents on the upper floors. If the lift is too high, excessive energy consumption will occur and may cause unnecessary stress on the pump and piping, shortening the equipment's lifespan. Therefore, accurately calculating the flow rate and lift requirements is essential for selecting the right mixed flow pump.     Considering Media Characteristics   Media characteristics are like the "opponent characteristics" a mixed flow pump faces during operation, significantly influencing its selection. Different media have varying physical and chemical properties, which determine the pump's material and seal type.   If the medium being transported is clean water, a relatively "mild" medium, a standard cast iron or stainless steel mixed flow pump will suffice. Cast iron is relatively cost-effective and widely used in applications such as agricultural irrigation and urban clean water distribution. Stainless steel, on the other hand, offers greater corrosion resistance and is more suitable for drinking water supply systems with high water quality requirements. In this case, the more common sealing options include a stuffing box or mechanical seal. Packing seals are inexpensive and easy to maintain, making them suitable for applications where leakage requirements are less stringent. Mechanical seals offer better sealing performance, minimize leakage, and can meet more stringent sealing requirements.   When the medium is a corrosive liquid, such as the various acid and alkali solutions used in chemical production, it presents a formidable challenge. Therefore, the pump material must possess excellent corrosion resistance. Materials such as fluoroplastic alloys and titanium alloys can be used to manufacture the flow passage components of mixed-flow pumps to resist erosion by corrosive media. Sealing methods also require upgrading to corrosion-resistant mechanical seals, and specialized flushing and cooling systems may be required to ensure seal reliability. For example, in sulfuric acid production plants, mixed-flow pumps transporting sulfuric acid require fluoroplastic alloys, with double-end mechanical seals and external flushing systems to prevent sulfuric acid leaks.   When the medium contains solid particles, such as sludge in sewage treatment or slurry in mine drainage, it presents a formidable challenge. Therefore, the pump material must be wear-resistant. Wear-resistant cast iron and ceramics are commonly used, and the impeller and pump body design also prioritizes wear resistance. The sealing method must prevent solid particles from entering the sealing surface and causing seal failure. For example, specialized sealing structures can be used, such as a combination of a plenum seal, a packing seal, and a labyrinth seal. In sewage treatment plants, when handling wastewater containing large amounts of solid impurities, the impeller of a mixed flow pump is made of wear-resistant cast iron, and the seal is a plenum seal plus a packing seal.   Therefore, selecting the appropriate mixed flow pump based on the characteristics of the medium is crucial to ensuring stable and efficient operation. If the wrong choice is made, the pump may quickly be corroded and worn by the medium, rendering it inoperable.     Brand and Quality   When choosing a mixed flow pump, brand and quality are crucial factors that cannot be ignored. Well-known brands often represent reliable quality and a good reputation. Just as people trust brands like Apple and Huawei when buying mobile phones, choosing well-known brands like Grundfos and Ebara provides greater peace of mind when purchasing a mixed flow pump. These brands typically possess advanced production technology and strict quality control systems, meticulously overseeing every step from raw material procurement to product production. Their products excel in performance, reliability, and stability, meeting the demands of a variety of complex working conditions.   There are also several methods and suggestions for identifying product quality. First, check the product's certifications, such as ISO 9001 quality management system certification and CE certification. These certifications serve as a testament to product quality. Second, observe the product's appearance. A high-quality mixed-flow pump will have a smooth surface, free of obvious defects, and even, neat welds. You can also research product reviews and reputations online and on industry forums to learn about other users' experiences and feedback. If a majority of users give a particular brand of mixed-flow pump positive reviews, it suggests the product is reliable.     After-sales service is also a key consideration when choosing a mixed-flow pump. High-quality after-sales service can provide timely and effective support in the event of a pump failure. For example, check whether the brand manufacturer has an after-sales service center in your area and whether maintenance personnel can respond quickly and arrive on-site for repairs. After-sales service also includes replacement of wearing parts, technical consultation, and training. If after-sales service is not in place, once a pump fails, it may cause long downtime, causing great losses to production and life. Therefore, when purchasing a mixed flow pump, it is important to understand the brand manufacturer's after-sales service policy and guarantee measures.  

In the industrial field, wear-resistant slurry pumps and mud pumps are both common fluid conveying equipment, but there are some significant differences in their functions, structures, and applications.     In terms of application   Wear-resistant slurry pumps are primarily used to transport slurries containing solid particles, which are typically hard and corrosive, such as ore, sand, gravel, and ash. Their design focuses on resisting the abrasion and impact of solid particles to ensure long-term stable operation under harsh operating conditions. Mud pumps, on the other hand, are primarily used to transport slurry-like media, which typically have finer particles and are relatively less corrosive, such as drilling mud and mud-water mixtures.   Structurally   Wear-resistant slurry pumps typically have more robust flow components, such as the impeller and jacket, made of highly wear-resistant materials to resist abrasion from solid particles. Their pump bodies are also more corrosion-resistant, making them suitable for complex media environments. Mud pumps have a relatively simpler structure, focusing on both suction and discharge capabilities.     Performance   Wear-resistant slurry pumps excel in handling highly concentrated, abrasive slurries, providing high head and flow rates while also exhibiting excellent wear resistance. Mud pumps, on the other hand, focus more on handling viscous slurries and have relatively lower flow and head requirements.   Operating Principles   While the two have similarities, they differ in specific details. Wear-resistant slurry pumps use the rotating impeller to generate centrifugal force to propel the slurry, while also addressing the unique challenges posed by solid particles. Mud pumps focus more on agitating and moving the slurry.   In practical applications   Selecting the appropriate pump depends on the operating conditions and media characteristics. For handling slurries containing a large amount of hard particles and high abrasiveness, wear-resistant slurry pumps are a better choice; for applications primarily handling slurry-like media, mud pumps are more suitable.   In short, both wear-resistant slurry pumps and mud pumps play an important role in industrial production. Understanding their differences can help us select and use them appropriately in various projects and achieve more efficient and reliable fluid transportation.

  Large electric motors are at the heart of industrial operations. They power the pumps that move fluids and the conveyor belts that keep production lines moving. While their mechanical output is readily apparent, what's often overlooked is how efficiently they use energy. Let's explore the importance of energy efficiency in large electric motors. From reducing operating costs to achieving environmental goals, the benefits are clear. Now, we'll take a look inside these devices. What exactly makes large electric motors so energy-efficient? And how can companies ensure each motor is operating at its maximum efficiency?   Understanding Motor Efficiency Motor efficiency measures its ability to convert electrical energy into mechanical energy. No motor is perfect—some energy is always lost as heat, noise, or other effects. Energy-efficient (high-efficiency) motors are designed to minimize these losses. For large electric motors, even small improvements in efficiency can result in significant energy and cost savings. For example, a 1% improvement in the efficiency of a 600-horsepower motor can save thousands of dollars annually.   The Role of Materials One of the primary factors affecting motor efficiency is the quality of the materials used in its construction. High-efficiency motors typically utilize high-quality electrical steel in their stator and rotor cores. This advanced material reduces core losses, such as hysteresis and eddy current losses, by enhancing magnetic flux conductivity. This minimizes heat losses and improves the motor's overall energy efficiency. Furthermore, these motors utilize high-conductivity copper windings and rotor bars, which typically have a larger cross-sectional area and are precision-wound. This design minimizes electrical resistance and reduces I²R losses (heat generated by current flowing through the winding and rotor conductors). While these improvements may increase initial investment costs, they provide long-term benefits through reduced energy consumption, lower operating costs, and extended motor life.   Precision Manufacturing Motor efficiency depends not only on material quality but also on manufacturing precision. By employing tighter mechanical tolerances and precise alignment of internal components, high-efficiency motors effectively reduce mechanical vibration and operating noise, ensuring consistently optimal electromagnetic performance. A key design parameter is the air gap—the tiny gap between the stator and rotor. An excessively large air gap weakens magnetic coupling and reduces efficiency, while an excessively small air gap can lead to physical contact, resulting in mechanical wear and energy loss. Precision manufacturing processes ensure that the air gap is consistently maintained within the optimal range for optimal performance. Thermal management is another crucial factor. High-efficiency motors employ advanced heat dissipation designs, such as enlarged heat sinks and optimized airflow channels, to effectively dissipate heat. This improved heat dissipation not only improves operating efficiency but also extends the motor's lifespan and reliability under continuous operation.   Advanced Motor Design While traditional induction motors remain widely used, new motor designs are pushing the boundaries of efficiency. A typical example is the permanent magnet synchronous motor (PMSM), which incorporates permanent magnets embedded in the rotor. These magnets generate a constant magnetic field, eliminating the need for rotor current and significantly reducing energy losses. PMSMs are particularly well-suited for applications requiring variable speed and/or high torque, such as pumps, fans, HVAC systems, and electric vehicles. While their initial cost is higher, their superior energy efficiency often makes the investment worthwhile.   Variable Frequency Drive Technology The most effective way to improve motor efficiency often lies not in the motor itself, but in how it's controlled. Variable frequency drives (VFDs) enable motors to operate at variable speed, adjusting output power in real time to match load demand. Without a VFD, traditional induction motors maintain a near-constant full speed regardless of load demand, resulting in significant energy waste when operating under partial load conditions. With a VFD, the motor can reduce speed based on actual demand, significantly reducing energy consumption. This feature is particularly beneficial in applications such as pumps and fans, where the power required scales with the cube of the speed.   System-Level Considerations A motor isn't a standalone device; its energy efficiency is influenced by the entire system—from the power supply to the mechanical load. Therefore, a holistic, systems-level approach is essential. Motor selection is crucial: an overpowered motor will operate inefficiently under partial load, while an underpowered motor may overheat and fail prematurely. Performing a load analysis ensures the motor is optimally matched to the application. Regular maintenance is another key factor. Clogged filters, poor shaft alignment, or worn bearings can all reduce motor efficiency. Implementing a preventive maintenance program ensures that motors consistently operate at peak performance. It's important to note that high-efficiency motors typically run at slightly higher speeds than less-efficient motors. When replacing an inefficient motor, it's crucial to thoroughly assess the impact on system performance.   Intelligent Monitoring and Predictive Maintenance Advances in digital technology now make it possible to monitor motor performance in real time. Smart sensors track key parameters such as temperature, vibration, and current draw, providing early warning of potential problems. This data not only enables predictive maintenance, enabling technicians to address issues before they occur, but also helps identify energy inefficiencies, such as motors operating at low loads or outside of their optimal operating range for extended periods. By integrating motor data into broader energy management systems, companies can gain valuable insights and continuously optimize operations.   Building a Smarter Future High-efficiency, large-scale motors are more than just a technological upgrade; they are a strategic investment in sustainability, reliability, and profitability. By focusing on high-quality materials, precision manufacturing processes, advanced design, and intelligent control systems, companies can unlock the significant value of their motor systems.   About the Author: Chris Stockton holds a Bachelor of Science degree in Mechanical Engineering from Clemson University in Clemson, South Carolina. A Fellow of the Institute of Electrical and Electronics Engineers (IEEE) and a Registered Professional Engineer, Stockton currently leads product management and technology for ABB's Large Motors and Generators business in the United States, based in Greenville, South Carolina.

Taixin Economic Zone (Taiyuan Area) Dayu Industrial New City Flood Control Pump Station Project Project Background Building Flood Control and Drainage for the Taixin Economic Zone "Lifeline" The Taixin Economic Zone serves as a strategic engine for promoting coordinated regional development in Shanxi Province. The Dayu Industrial New City in its Taiyuan area carries the crucial mission of industrial upgrading and urban-industrial integration. However, the new city's low-lying terrain presents a significant risk of flooding during the rainy season, making traditional drainage systems unable to meet the demands of rapid development. To ensure the safe operation of the new city and enhance its flood control and drainage capabilities, the Dayu Industrial New City Flood Control Pumping Station Project was developed, becoming critical infrastructure for the stable development of the regional economy.   Project Overview Southern Zhishui's high-pressure submersible mixed-flow pump station sets an industry benchmark The project, covering an area of approximately 6,000 square meters, is equipped with eight submersible mixed-flow pumps, each with a power output of 1,150 kilowatts. 2,200 meters of 2.6-meter-diameter steel pipe and concrete tongue-and-groove pipe are installed. When operating at full capacity, the system can pump and drain water up to 30 cubic meters per second (108,000 cubic meters per hour). This impressive drainage capacity is equivalent to pumping and draining the entire West Lake in Hangzhou (with a storage capacity of approximately 10 million cubic meters) in just seven days. As a key flood control project in Shanxi Province, the project adheres to the highest provincial construction standards and has been commissioned as the largest pumping station in North China, significantly enhancing regional flood control and drainage capabilities. The project uses Southern Zhishui's high-pressure submersible mixed flow pump and intelligent drainage system. Through its core advantages such as efficient drainage system, intelligent control system and excellent operation and maintenance performance, it redefines the technical standards of modern pumping stations and provides intelligent and efficient solutions for urban flood control and drainage.   Project Difficulties Technological innovation to overcome complex challenges   01 Large Flow Fluctuations During the rainy season, instantaneous water inflow surges. Adaptive regulation technology ensures efficient operation of the mixed-flow pumps under both high and low loads, minimizing energy waste. 02 Tight Construction Schedule The high-pressure submersible mixed-flow pumps weigh 25 tons and were produced and transported in groups. The pump installation and the pump station drainage system were installed in parallel, enabling precise process integration and significantly improving overall construction efficiency. 03 High Intelligent Requirements Traditional pump station operation and maintenance rely primarily on manual inspections. This project leverages IoT and cloud computing analytics to build an intelligent monitoring system that enables real-time data collection, dynamic analysis, and risk warnings. This effectively predicts potential failures, significantly reduces operation and maintenance costs, and improves management efficiency. 04 Strict Environmental Standards The pump station operates in strict compliance with low-noise and zero-leakage standards. Southern Smart Water utilizes a fully enclosed structural design and efficient vibration damping technology to ensure operational stability, minimize environmental impact, and achieve green and low-carbon operation and maintenance.   Project Significance Triple Breakthrough in Economic, Ecological, and Social Benefits   01 Ensuring Regional Security This project has successfully established a 24/7 safety and security system for the Dayu Industrial New City, effectively eliminating regional flood risks and providing a solid foundation for business operations and residents' lives. 02 Promoting Smart Urban Development This intelligent demonstration project not only provides a replicable technical model for the development of new infrastructure in the Taixin Economic Zone, but also, through digital innovation, significantly promotes the in-depth implementation and effective implementation of the "Digital Shanxi" strategy. 03 Green and Energy-Saving Model The high-efficiency mixed-flow pump system employed in this project achieves over 20% higher energy efficiency than traditional equipment, reducing carbon emissions by over 100 tons annually. Powered by innovative energy-saving technologies, this project precisely aligns with the national "dual carbon" strategic goals and creates a model for green infrastructure. 04 Promoting Industrial-City Integration The stable and efficient drainage system constructed by the project has significantly improved the regional business environment, providing critical infrastructure support for the clustering of high-end industries and effectively contributing to the strategic goal of building the Taixin Integrated Economic Zone into a national-level industrial-city integration demonstration zone.

  Shanghai Bailonggang Sewage Treatment Plant is the largest sewage treatment plant in Asia and one of the largest sewage treatment plants in the world. The plant can treat sewage generated by approximately 3.6 million people.   Project: Wastewater purification in Shanghai In Bailonggang, directly adjacent to the multi-million-person metropolis of Shanghai in eastern China, a wastewater treatment plant is to be built that will be one of the largest in the world. One third of the wastewater in the nearby watershed of more than 270 square kilometers is to be purified here – more than two million cubic meters per day.   Challenge: One of the largest wastewater treatment plants in Asia The special feature of this task is its huge size and the high demands placed on wastewater technology. The construction of the wastewater treatment plant requires the use of hundreds of wastewater pumps, and the company operating the wastewater treatment plant decided to purchase these pumps from KSB because they fully met the required performance parameters. In particular, the KSB pumps have a higher hydraulic efficiency than many competitor products, which today significantly improves the energy efficiency of the entire wastewater treatment plant.   Solution: more than 300 submersible pumps with all components KSB supplied a total of 241 axial sewage submersible pumps of the Amacan type, 65 submersible pumps of the Amarex KRT and Amarex N series, six dry-installed sewage pumps of the SPN type and six dry-installed axial flow pumps of the ZL type. The pumps were delivered pre-assembled with all the associated components and in some cases also equipped with the required switch cabinets.   The Bailonggang sewage treatment plant in Shanghai is now the largest sewage treatment plant in Asia and one of the largest in the world. One third of the sewage from this city of ten million people is purified here. More than two million cubic meters of sewage flows through the treatment plant every day.   KSB models used: 241 Amacan axial submersible pumps 65 Amarex KRT and Amarex N series submersible pumps 6 SPN dry-installed sewage pumps 6 ZL dry-installed axial pumps

Recently, the urban and rural water supply integration improvement and guarantee project in Pingyin County, Jinan City, which was won by Nanfang Pump Industry, has been successfully completed. The project aims to ensure the quantity and quality of domestic water for local urban and rural residents, fundamentally solve people's livelihood problems, and drive local economic development. With its professional technical strength and efficient construction team, Nanfang Pump Industry has successfully assisted the smooth implementation of the project.   Project Overview The urban and rural water supply integration improvement and guarantee project in Pingyin County, Jinan City, gradually replaces water supply sources such as the county town and Ancheng Town through the construction of Wangying underground water source, Cuidong Water Plant and the laying of about 16 kilometers of water distribution pipelines, thereby comprehensively solving the drinking water problem in the urban area. As the winning bidder, Nanfang Pump Industry undertook the supply, installation and commissioning of key equipment.         Nanfang Pump Industry Demonstrates Excellent Capabilities Technical Strengths Nanfang Pump Industry has its own precision machining casting factory and the world's advanced automated precision machining center to ensure the reliability and timeliness of castings. Intelligent control ‌ In view of the long distance between the newly built Wangying water source and the water plant and the large changes in water consumption during different periods of time, Nanfang Pump Industry provided efficient ABB variable frequency control cabinets and intelligent PLC data control systems. The system can automatically start and stop the water pump according to the water consumption of the water plant, realizing intelligent interlocking control, which not only improves the efficiency of the water pump, but also significantly reduces the operating cost.         Professional installation and service ‌ During the installation of pump room equipment, Nanfang Pump Industry implemented it in accordance with the installation and commissioning requirements and specifications to ensure the installation accuracy of the pump unit, optimize the pipeline layout, and reduce hydraulic losses by more than 15%. In terms of after-sales service, Nanfang Pump Industry has established a 124 response mechanism and equipped with a professional operation and maintenance engineer team, promising to respond within 1 hour, arrive at the site within 2 hours, and solve routine problems within 4 hours. This "full life cycle" service concept not only ensures the stable operation of the project, but also reflects the "customer-centric" professional service spirit of Nanfang Pump Industry.       Advantages in large-scale water supply and drainage projects High efficiency and energy saving ‌ NSC single-stage double-suction split centrifugal pump adopts advanced fluid dynamics design and customizes coating solutions according to the water quality of Pingyin County, making the pump more efficient and energy-saving, achieving a 40% increase in the comprehensive energy efficiency of the water supply system, and meeting the high requirements of the Pingyin County urban and rural water supply integration improvement and guarantee project. Stable and reliable ‌ The double suction port realizes symmetrical fluid input, and the axial force self-balancing design increases the bearing life by 30%-40% compared with the single-suction pump, and the operation is more stable. After the water plant adopted this pump type, the daily average water supply pressure fluctuation of 50,000 tons was stably controlled within ±0.02MPa, which is better than the national standard requirements. Easy maintenance‌ The pump body is designed to be split horizontally along the axis, and the core components such as impellers and bearings can be directly maintained without disassembling the pipeline or motor. During the construction of the Jinan Pingyin project, this feature increased the equipment maintenance efficiency by more than 50%, and the double sealing ring low-friction technology made the water pump life longer, effectively ensuring the continuous operation requirements of the 16-kilometer water transmission network. Full life cycle benefits‌ The modular design combined with the intelligent operation and maintenance platform saves more than 40% of the comprehensive operating cost compared with traditional pumps, which meets the requirements of the Pingyin County "from water source to tap" full process intelligent monitoring system.

The scorching heat of summer is unbearable. After a busy day of work, you return to your warm home and enjoy the surging hot water with a touch of your fingertips, washing away the fatigue of the day - such scenes and feelings are in Beijing Sunac Xuefu No. 1 Courtyard, located at the intersection of Nongda South Road and Shucun Road in Haidian District, Beijing. It is a city cover work, positioned as a high-end green residential residence, integrating green technology into every inch of space, and the intelligent hot water circulation system created by German Wilo water pumps is an important part of its construction of comfortable living.   The ultimate pursuit of green living As the pinnacle of Sunac's "No. 1 Courtyard", Xuefu No. 1 Courtyard occupies the core area of ​​Haidian and creates a model of prefabricated technology housing with a volume of 128,000 square meters. The project has won honors such as "2021 Technology Residential Building" and "China Green Building Star". Its architectural language is not only a modern interpretation of stone and glass, but also a deep practice of sustainable life. The Sunac Xuefu No. 1 Courtyard project is built strictly in accordance with the standards of three-star green buildings, low-energy buildings and healthy buildings. The prefabricated interior decoration technology realizes pipeline separation and dry construction, eliminating formaldehyde pollution from the source. Behind the innovative experience of installing and moving in, there is a profound consideration of residential health and the entire life cycle of the building.   150 years of inheritance, creating a "zero waiting" experience for hot water systems The standard configuration of comfortable hot water has long been expanded from constant temperature to "zero waiting for hot water". In response to the requirements of energy conservation and emission reduction of green buildings, Xuefu No. 1 Courtyard adopts a solar energy and building integrated hot water system, which is integrated with the building to ensure energy saving, stability and user experience. And Wilo, with the Wilo-PH 751QH series circulation pump and the Wilo-MHI 204 series horizontal multi-stage pump as the core, has built a customized smart hot water solution covering 900 households and stable operation. With high-efficiency impellers, low-noise design and long-life sealing components, Wilo's hot water system solution not only meets the complex needs of water pressure fluctuations in high-rise residential buildings, but also responds positively to the low-carbon vision of green buildings with an annual power saving of more than 300,000 kWh.     From construction to intelligent regulation, solving problems layer by layer In the delivery standards of Sunac Academy No. 1, the intelligent hot water circulation system created by Wilo is not an isolated existence, but a stable and efficient hot water supply system is built through technological innovation. In response to the pain points of water pressure fluctuations in high-rise residential buildings and the technical integration difficulties of the integration of prefabricated decoration systems and solar energy systems, the Wilo team: ✅ Choose products with technical advantages (such as high-efficiency impellers, low-noise design, and long-life seals) such as PH751QH circulation pumps and MHI204 horizontal multistage pumps to meet the requirements of green buildings, integrated solar hot water circulation systems, and integrated architectural design. While solving the problem of water pressure fluctuation in high-rise residential buildings, it also realizes the comfortable water experience of "zero cold water" and instant heating in the whole house   ✅The energy-saving and efficient design of Wilo water pump products, combined with the solar energy priority strategy in the system, greatly reduces the energy consumption of the system and successfully achieves an annual power saving of more than 300,000 kWh   ✅It is also linked with the project's smart security system to monitor water temperature and flow in real time, and automatically switch to the backup pump when a fault occurs, to fully guarantee the stability and safety of 24-hour hot water supply, which not only solves the needs of the user end, but also provides strong support for the construction party to win multiple certifications for green buildings   ✅The rich product series of Wilo products meets the product selection requirements of the split double-circulation system pressure design designed in the project to cope with the challenges of the system's antifreeze performance in the severe winter below -10℃. It ensures the long-term safe operation of the water pump products after reasonable selection in the system   For the top people who pursue high quality, the value of this system is far more than that. The person in charge of the project commented: "The cooperation between Wilo Pumps of Germany and Xuefu No. 1 Courtyard not only provides us with advanced technology and excellent services, but also a strong combination of the two brands. As a high-end residential series under Sunac, we are very strict in the selection of equipment and materials. After multiple comparisons, we finally chose Wilo Pumps."   From product strength to system strength, reshaping the value standard of high-end residential buildings This cooperation not only promoted the industry's first deep integration of solar water heating systems and building structures, but also helped to formulate the "Specifications for the Installation of Prefabricated Building Pumps", transforming the concept of "dry construction method and zero rework" into industry standards, and shortening the overall construction period by more than 20%. At the same time, the full-cycle service concept proposed by the Wilo sales team and the capability center team, covering pre-consultation, fast delivery, on-site support, worry-free after-sales, is leading the industry from "focusing on sales" to "focusing on operations". Data shows that after the project was delivered, the customer repurchase rate increased by 35%, and the service premium effect continued to be released.   "Hidden Champion" in the Field of Green Building With traceable energy-saving data, the Sunac Xuefu No. 1 Courtyard project successfully obtained a preferential green loan interest rate, indirectly saving more than one million yuan in financing costs and realizing "environmental protection is profit". Wilo is not only an equipment supplier, but also a co-builder of the economic value of green buildings. When a house returns to its essence of living, a true "high-standard residence" is not only about the quality of space, but also about the living temperature created by technology and services. In Xuefu No. 1 Courtyard, Wilo pumps make every drop of water carry the temperature of green technology, and also make the future of human life tangible, touchable and sustainable, so that "Wilo" can be used to enjoy life.