1. According to the hole diameter, water initial pump type. Different types of pumps on the borehole diameter size have certain requirements, the maximum dimension of the pump to less than the well diameter 25 ~ 50mm. If the borehole deflection, maximum dimension of pump should also smaller. In a word, pump body parts cannot get close to the borehole wall, waterproof pump vibration will damage wells.
2. For selected for decreased to, according to the well water, the selected pump well flow. Each hole has an economically optimal water, the pump flow should be equal to or less than water wells wells depth half out of the water. When the pumping more water than wells out of the water, will cause the borehole collapse deposition, affecting the well service life; if the quantity of pumping water is too small, well benefit not to give full play to. So, the best way is to wells pumping test to wells may provide the greatest amount of water well pump flow basis. The pump flow to label types or instructions marked on the figure.
3. According to the well water level dropped depth and water head loss of pipeline and determine the actual needs of the well pump lift, the lift of pump wells, it is equal to the water to the water tank of the vertical distance (net lift) and loss of lift. Lift loss is usually the net lift of 6 ~ 9%, usually 1 ~ 2m. The pump at the bottom of the first stage impeller into water depth to 1 ~ 1.5m. Tube well water pump portion of the total length should not exceed the stipulated in the manual pump wells maximum length.
4. The amount of sediment in the deep wells more than one ten thousandth of the wells, installation should not be used in deep well pump. Because the sediment concentration of water is too large, such as more than 0.1%, will accelerate the rubber bearing wear, causing the pump vibration, shorten the service life of the pump.
