Ball Valve Stems & Seats,Floating Elbow Valve Spheres,Cast Elbow Valve Spheres,Cast Solid Elbow Valve Spheres WENZHOU ZHENHONG VALVE BALL CO., LTD , https://www.zhvalveball.com
Influence of gas content in transmission medium on performance of single stage centrifugal pump
In order to ensure the reliable and efficient operation of a single-stage centrifugal pump, it's essential to minimize the gas content in the fluid being pumped. Here are some key measures that should be taken:
First, the design of the suction inlet and the layout of the suction piping must be carefully planned. The suction nozzle should be submerged to a certain depth (H1) within the suction tank, and there should also be a certain amount of free space (He) above the liquid surface, as shown in Figure 2-126. This helps prevent air from being drawn into the system.
Second, the inlet, return, and waste collection pipes should be positioned away from the pump’s suction nozzle. This prevents air bubbles or vapor from being quickly sucked in, which can cause cavitation and reduce pump performance. Additionally, the suction pipe should not be placed in the center of the tank, nor too close to the walls—ideally at least 1.5 times the diameter (D) away from the wall—to avoid vortex formation or air entrainment, as illustrated in Figure 2-126.
Third, all pipe connections must be properly sealed to prevent air leakage, which can significantly impact the pump’s efficiency and lifespan.
Lastly, the suction piping should be arranged in such a way that no air pockets are formed. Air traps can lead to poor flow conditions and potential damage to the pump over time. As shown in Figure 2-127, careful planning is required to eliminate such issues.
By following these guidelines, you can greatly improve the performance and reliability of your centrifugal pump system. Always make sure to review the latest technical specifications and installation manuals for your specific equipment.