Description: remaining, unused volume at the end of the pressure stroke; Name: Dead space volume
Description: volume remaining unswept at the end of the discharge stroke; Name: clearance volume
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