QGBa china factroy submersible water pumps deep well pump
1、 The pump type is preliminarily determined according to well diameter and water quality. Different types of pumps have certain requirements for the size of well diameter, and the maximum overall dimension of the pump shall be less than the well diameter of 25 ~ 50mm. If the well hole is skewed, the maximum overall dimension of the pump shall be smaller. In short, the pump body shall not be close to the inner wall of the well to prevent the well from being damaged by the vibration of the waterproof pump.
II. Select the flow of deep well pump according to the water output of the well. Each well has an economically optimal water output, and the flow of the pump shall be equal to or less than the water output when the water level of the motor well drops to half of the well water depth. When the pumping capacity is greater than the pumping capacity of the well, it will cause the collapse and deposition of the well wall and affect the service life of the well; If the pumping capacity is too small, the benefits of the well will not be brought into full play. Therefore, the best way is to carry out pumping test on the motor well, and take the maximum water output that the well may provide as the basis for selecting the well pump flow. The pump flow shall be subject to the number marked on the manufacturer's model or manual.
III. determine the actual required head of the deep well pump according to the falling depth of the well water level and the head loss of the water transmission pipeline, that is, the head of the deep well pump, which is equal to the vertical distance (net head) from the water level to the water surface of the outlet tank plus the lost head. The loss head is usually 6 ~ 9% of the net head, usually 1 ~ 2m. The water inlet depth of the lowest stage impeller of the water pump should be 1 ~ 1.5m. The total length of the part under the pump tube well shall not exceed the maximum length into the well specified in the pump manual.
IV. deep well pumps should not be installed for wells with well water sediment content exceeding 1 / 10000. Because the sand content 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