Description: mean flow rate through the valve seat under specified working conditions; Name: valve seat speed
Description: mean velocity of the flow through the valve seat at the specified operating conditions; Name: valve seat velocity
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