The design, material selection and use of the diaphragm seal of the pneumatic diaphragm pump have an important impact on the performance and life of the pump. In order to ensure efficient and stable operation of the pump, it is necessary to select suitable diaphragm materials, design reasonable diaphragm shape and tension, and regularly inspect and replace the diaphragm.

The installation direction of the pipeline centrifugal pump is a complex and important issue, which needs to be determined according to the type and model of the pump and the actual usage scenario.

Large flow pumps are widely used in electronics, electricity, chemical industry, metallurgy, medicine, food, electroplating, environmental protection, fire protection, municipal administration, water purification, textile printing and dyeing, mining and mineral processing, civil construction and other industries due to their good performance, high efficiency, long life and large flow. In actual operation, the flow of large flow pumps can be infinitely adjusted by various methods. Under normal circumstances, the pump works reasonably under the rated point condition, but sometimes due to some reasons, the pump runs under the small flow condition point, which will cause the following negative effects.

As a key equipment for fluid transportation, pumps are widely used in various fields. However, during the operation of the pump, cavitation often occurs, which not only affects the performance of the pump, but also may cause damage to the pump's flow-through parts and shorten the service life of the pump. Therefore, in-depth research on the cavitation phenomenon of the pump is of great significance to improving the operating efficiency and safety of the pump.

The factors affecting centrifugal pump cavitation are issues that must be considered in the design and use of centrifugal pumps. In recent years, a lot of research has been carried out at home and abroad. However, due to different focuses of research, and most of them are conducted on a certain parameter that affects centrifugal pump cavitation, the research results are scattered and some of the opinions are contradictory. This article analyzes the impact on cavitation from the perspective of fluid physical properties.