Description: highest speed at which the manufacturer's design permits continuous operation; Name: maximum allowed ongoing speed 
Description: highest speed for continuous operation recommended by the manufacturer; Name: maximum allowable continuous speed
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