... , mild discharge and water diversion project. Introduction QZ series submersible axial flow pump, QH series submersible ... % -5% efficiency, and excellent resistance to cavitation. QZ, QH series of pump flow with a single large, ... savings of 30% -40% of total cost. B: easy to maintain, there is a leak and ... reliable operation. C: low noise, long life. QZ, QH series of impeller and impeller base material ...