Description: remaining, unused volume at the end of the pressure stroke; Name: Dead space volume
Description: volume remaining unswept at the end of the discharge stroke; Name: clearance volume
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