Description: Difference: NPSH reference plane and reference plane ; Name: height (npsh datum plane)
Description: Difference between the NPSH datum plane and the reference plane ; Name: Height of the NPSH datum plane
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