Description: Difference between the command variable and the feedback variable; Name: control difference
Description: difference between the reference variable and the feedback variable; Name: control difference variable
Description: net positive suction head (NPSH) from flow rate at best efficiency point for actual impeller (indication of the minimum inlet pressure in meters required for the pump to deliver according to the QH curve. related to the optimum duty point at the current impeller diameter); Name: net positive suction head for Q opt at actual impeller size