Usually selected
centrifugal pump flow, pressure head may and piping requirements, inconsistent, or because the production task, process requirements change, this time require the pump flow adjustment, essence is to change the operating point of the centrifugal pump. The working point of the
centrifugal pump is determined by the characteristic curve of the pump and the characteristic curve of the pipeline system. So, the change of the characteristic curve of any one can achieve the purpose of flow regulation.
At present, the main flow of the
centrifugal pump control valve control, variable speed control, and the pump and, in series, and so on. The principle of regulating a variety of different, in addition to their own advantages and disadvantages, the energy loss caused by are not the same, in order to seek the best, the minimum energy consumption, the energy saving flow regulation must be comprehensive understanding of centrifugal pump flow regulating the relationship between mode and energy consumption.
Centrifugal pump and piping system characteristic curve analysis of the centrifugal pump flow regulation of several main ways: export valve regulation, pump speed adjustment and the pump string, parallel regulation. With the characteristic graph analysis of exit valve and pump variable speed regulating the energy loss of the two ways, and makes a comparison and pointed out centrifugal pump speed regulating the flow than outlet valve regulating the flow can better save energy, and energy-saving efficiency and flow rate changes in the size of about. In practical application, it should pay attention to the range of variable speed regulation, in order to better use of centrifugal pump speed adjustment.
