There is a positive correlation between the number of revolutions and flow of a screw pump. In practical applications, it is necessary to select a suitable range of revolutions according to specific needs and equipment characteristics to ensure stable operation and efficient pumping of the equipment.

The determination of the pump's operating point is a process that comprehensively considers the pump's performance, the characteristics of the pipeline system, and the external environmental conditions. Through precise calculation and reasonable adjustment, it can ensure that the pump operates at the optimal operating point, thereby achieving the goals of high efficiency, stability and energy saving.

The calculation of the installation height Hg of a centrifugal pump is a process involving multiple factors, mainly including the allowable suction vacuum height Hs, the total resistance of the suction pipeline Hf0-1, the velocity V1 of the liquid at the pump inlet, etc.

As an important equipment for industrial fluid transportation, the selection of centrifugal pumps is directly related to production efficiency and operating costs. The correct selection of centrifugal pumps can not only ensure the stable operation of the production process, but also effectively reduce energy consumption and maintenance costs. Therefore, this article will discuss how to correctly select a suitable centrifugal pump from the aspects of the working principle, selection principle, parameter calculation and practical application of centrifugal pumps.