For the same pump, when the impeller diameter is constant, change the speed ratio of its performance can be the following law of conversion.
![The pump speed and flow, head, shaft power have anything to do](http://www.www.qichebeibei.com/UploadFiles/2022-04/20224275146725987.gif)
Where: Q1, H1, Pa1 - that when the flow speed n1, head, shaft power;
Q2, H2, Pa2 - that when the flow speed n2, head, shaft power.