Deep well pump selection requirements

First, according to the caliper, water quality of the initial pump. Different types of pumps have certain requirements on the size of the borehole, and the maximum size of the pump is smaller than the bore diameter 25-50mm. If the borehole is skewed, the pump's maximum dimensions should also be smaller. In short, the part of the pump body cannot be close to the inner wall of the well and the well is damaged by the vibration of the waterproof pump.

Second, according to the amount of water out of the well, select the flow rate of the deep well pump. Each well has an economically optimal amount of water, and the flow of the pump should be equal to or less than the amount of water discharged when the well water level drops to half the depth of the well. When the pumping volume is greater than the pumping volume of the well, it will cause wall collapse and siltation, affecting the service life of the well; if the pumping volume is too small, the efficiency of the well will not be fully realized. Therefore, the best way is to carry out pumping tests on the wells, so that the wells may provide the maximum amount of water for the selected well pump flow. The flow rate of the pump shall be based on the number marked on the label or on the specification.

Third, according to the depth of the well water level and the loss of the water pipeline head. Determine the actual required head of the deep well pump, ie the head of the deep well pump, which is equal to the vertical distance (net head) from the water level to the surface of the outlet pond plus the loss head. The loss head is usually 6 to 9% of the net head, usually 1 to 2 meters. The depth of the bottom impeller of the water pump is 1~1.5m. The total length of the downhole part of the pump pipe shall not exceed the maximum length of the well specified in the pump specification.

Fourth, wells with more than one ten-thousandths of the sand wells, should not be installed and used deep well pump. Because the amount of sediment in the well water is too large, if it exceeds 0.1%, it will accelerate the wear of the rubber bearing, cause the vibration of the water pump, and shorten the service life of the water pump.