Description: Ratio of the amount of active power to the apparent power; Name: cos phi
Description: Relation of the amount of the active power to the false performance; Name: Power factor (cos phi)
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