Deep well pump how to choose

Deep well pump selection Deep well pump is a vertical multistage centrifugal pump, which can lift the water from the deep well. As the groundwater level drops, deep well pumps are used more widely than conventional centrifugal pumps. However, some users due to improper selection, there has not installed into, out of water, pumping to the water, or even damaged wells and other issues. So, how to choose the user deep well pump? First, according to the caliper, the initial water quality pump. Different types of pumps have certain requirements on the hole diameter. The maximum size of the pump is less than 25 ~ 50mm of the hole diameter. If the borehole skew, the maximum size of the pump should be smaller. In short, the part of the pump body can not close to the inner wall of the well to prevent the pump from damaging the well due to vibrations of the pump. Second, according to the well water, selected well pump flow. Each well has an economically optimal volume of water that should flow at a rate equal to or less than the level at which the well water level drops to half the well depth. When the pumping capacity is greater than the machine water, it will cause the machine shaft wall collapse siltation, affecting the life of the well; if the pumping is too small, the benefits of wells will not be fully realized. So, the best way is to pump wells pumping test, with the wells may provide the largest amount of water for the selected well pump flow basis. Pump flow to the label number or label on the manual shall prevail. Third, according to the depth of decline of well water level and water pipeline head loss, determine the actual needs of the well pump lift, that is, the pump head, which is equal to the water level to the pool water surface vertical distance (net head) plus the loss of head. Lost head lift is usually 6 ~ 9% of the net head, usually 1 ~ 2m. Pump the lowest impeller into the water depth of 1 ~ 1.5m appropriate. The total length of the downhole portion of the pump tube shall not exceed the maximum length of the well into which it is specified in the pump instructions. Fourth, wells containing more than one ten thousandth of sediment wells should not be installed to use deep well pump.Because well water content is too large, such as more than 0.1%, will accelerate the wear of rubber bearings, causing pump vibration and shorten the pump life .

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