Description: pressure of the atmosphere at a specified place and time; Name: pressure of the athmosphere
Description: Mean absolute pressure of the atmosphere measured at the place of installation of the pump ; Name: Atmospheric pressure
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