Description: pump power output divided by the pump power input; Name: efficiency (pump)
Description: proportion of the pump power input, p, delivered as pump power output, pu, at given operating conditions; Name: pump efficiency
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