Description: free cross-section of the discharge opening in the discharge nozzle of the pump; Name: Outlet cross section of the pump
Description: free cross-sectional area of the orifice in the outlet connection of the pump; Name: outlet area of the pump
Description: variable quantity, which is not influenced by the control but is introduced into the control system from outside with the aim of making the final controlled variable follow it in a given relationship; Name: command variable