Description: Ratio of the amount of active power to the apparent power; Name: cos phi
Description: Relation of the amount of the active power to the false performance; Name: Power factor (cos phi)
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