Research on key technologies for selection and design of regulating valves in gravity pressure flow engineering

Abstract

The flow control valve mainly achieves flow control by adjusting the valve opening. Different valve types and structural types can be selected according to different engineering characteristics, application scenarios, and pressure regulation range requirements. If the valve type is not selected properly, it not only affects the accuracy of flow control, but also causes valve vibration and noise due to cavitation problems, thereby affecting the service life of flow control valves. Therefore, it is crucial to choose the appropriate type and parameters of regulating valves based on the characteristics of the project and the usage scenario. A selection and design method were summarized for flow control valves in gravity pressurized flow engineering. A comprehensive analysis and comparison of flow control valves are conducted from several aspects such as valve type, diameter selection, installation elevation, and cavitation performance. The method has been successfully applied to the connection project between Shenzhen Gongming Reservoir and Qinglinjing Reservoir, ensuring the reliability, safety, and stability of project operation. This selection design method can provide reference for similar long-distance water transportation projects in the future, and has certain engineering application value.

Keywords

gravity pressurized flow / flow control valve / piston valve / selection design