Determination on Flow Rate Regulation of Centrifugal Pump for Long distance Pipeline

The technical analysis on the flow rate regulation method though regulating valve, frequency-speed variable device and liquefied coupler is carried out and the characteristics of them are compared in actual application in the article. The authors emphatically describe the application of frequency-speed variable device and problem in application and put forward the issues to be focused on for the feasible program determined in flow rate regulation as well as economic assessment method.