Description: pressure of the atmosphere at a specified place and time; Name: pressure of the athmosphere
Description: Mean absolute pressure of the atmosphere measured at the place of installation of the pump ; Name: Atmospheric pressure
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