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First of all, it is necessary to recognize the water pump manufacturer. It is recommended to give priority to the purchase of water-filled submersible pumps. To see the brand and product certification, we must not purchase "three no" products. At the same time, single-phase or three-phase pumps should be used depending on local power conditions.
Determining the Pump Parameter Selection The main point of submersible pumps is to determine the head and flow parameters of the pump. The best head of the user's choice is the same as the head on the pump nameplate. A typical deviation of no more than 20% can work in a more energy-efficient situation. If the pump head selected is too small, the low lift pump is used for high lift operation, ie “small horse-drawn cartâ€. Even if it can pump water, the water volume will be very small; the pump head is too high, and the high lift pump is used for low lift. Work, that is, "big horse-drawn car", there will be excessive flow during operation, motor overload, if the long-term operation, the motor temperature increases, the winding insulation will gradually aging, or even burned the motor.
The choice of pump flow rate should be adapted to the amount of water coming from the water source and the amount of water used, as well as the local economic conditions. Specific issues should be dealt with specifically.
Checking the quality of the pump The motor of the submersible pump has a water-filled, oil-filled, and shielded structure, and a water-filled type is the most widely used. Before using this pump, you must unscrew all 2 water injection holes, one water injection (no sand water), and the other discharges air. After the water injection, it needs to wait for about 15 minutes. After the air in the motor chamber is fully discharged, add water. Until the water is filled, then tighten the two water injection bolts. Keep the motor in a sealed state. After the motor is filled with water, the windings work in water, and the insulation of the motor can be measured. Measure the insulation resistance must use a megohmmeter, not a universal meter. The range of the universal meter is limited, and the insulation resistance between the winding and the earth cannot be measured clearly. After the insulation is qualified, test the pump. Where conditions permit, after the motor is filled with water, tighten the water injection bolts to allow the pump to be energized in the pool for trial operation, but it cannot be operated for a long time. If there is no condition, idle operation can be performed on the well, but the time must not exceed 2 to 3 seconds. .
Select agricultural submersible pump pay attention to three issues
The agricultural submersible electric pump is a kind of main water lifting equipment for solving rural households' production and domestic water consumption. As there are many manufacturers of submersible pumps, there is a large gap in technical strength and the quality of products is not the same. To choose a reliable, cheap water pump, you must start from the following aspects: Select the pump manufacturer in the purchase of the pump, it is best to consult the experts in the pump; if there is a lack of people in this area, may wish to ask the pump Old users, especially users with similar or similar conditions of use.