How to determine the pump installation elevation, why should we determine the pump installation elevation?
Determination of pump installation elevation: the geometric height between the suction well level and the center line of the pump impeller, plus the hydraulic loss of the suction pipe, is the actual installation height of the pump. (notice: if the suction level is higher than the center of the impeller, it should be negative)To determine the water pump installation elevation reasons: general water pump nameplate on the "NPSH" value, the above calculation of the value must be less than this NPSH value, so as to ensure that water pump is not prone to cavitation.[NPSH] - allowable cavitation margin is to determine the conditions of use of the pump cavitation margin.
This depends on the water pump cavitation, in theory, suction is equal to the atmospheric pressure minus the margin, the installation is too high to suck the water ah. What kind of pumps do you want?.
Water pump installation elevation should be in accordance with the water pump suction head, taking into account the water level of water intake and fall. The minimum water level at the water intake point must be less than the suction head of the water pump, otherwise the water intake will not be enough.
