What Are The Methods Of Flow Regulation Of Centrifugal Pumps?

Centrifugal pump is the liquid passing through the blades, and the liquid is thrown out by centrifugal force, so that the liquid can live with energy

1. Change the pipeline characteristic curve The easiest way to change the flow rate of the centrifugal pump is to use the opening of the pump outlet valve to control, in fact, to change the position of the pipeline characteristic curve to change the working point of the pump.

2. Changing the characteristic curve of the centrifugal pump According to the proportional law and the cutting law, changing the speed of the pump and changing the pump structure (such as cutting the outer diameter of the impeller, etc.) can change the characteristic curve of the centrifugal pump, so as to adjust the flow rate (change at the same time). head) purpose.

3. Pump series and parallel adjustment mode When a single centrifugal pump cannot meet the conveying task, parallel or series operation of centrifugal pumps can be used. When two centrifugal pumps of the same type are connected in parallel, although the pressure head does not change much, the total delivery flow is increased, and the total efficiency of the parallel pump is the same as that of a single pump; when the centrifugal pumps are connected in series, the total pressure head increases, The flow rate changes little, and the total efficiency of the series pump is the same as that of a single pump.

So if the flow of the centrifugal pump is large, should the auxiliary line be opened or the auxiliary line should be closed? The answer is that the auxiliary line valve must be opened to open the pump. After the operation is normal, the outlet valve is opened while the auxiliary line valve is closed. When the pump is stopped, it is just the opposite.

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