Description: the output variable (position) of the actuator used in open-loop and closed-loop control technology, with the help of which a targeted intervention in the open-loop or closed-loop system takes place; Name: correcting variable
Description: output variable of the controlling system, which is also an input variable of the controlled system; Name: manipulated variable
Description: amount of the absolute value of the total head above the head, equivalent to the vapour pressure of the liquid at the particular temperature, with reference to the NPSH datum plane; Name: net positive suction head