The lift of the selected pump should match the net lift of pump station, and the flow rate should be increased to ensure that the pump installation shall run at BEP. Thus a new pump selection method of lift keep and flow rate increase is advanced.

• 为保证泵装置运行在高效率点 ,所选用泵的扬程应与泵站净扬程相当 ,而流量必须加大 ,据此提出泵的等扬程加大流量选型方法