Description: variable variable that maps the controlled variable and is fed back to the comparator; Name: feedback variable
Description: variable quantity, which represents the controlled variable and is returned to the comparing element; Name: feedback variable
Description: Speed that characterizes a pump in terms of its speed, flow rate per impeller eye, i.e. total flow for single-flow impeller, half flow for double-flow impeller, at the best efficiency point and head per stage at maximum impeller diameter ; Name: Specific speed