Water Pump Selection Method

The flow rate of the water pump, that is, the water output, generally should not be selected too large, otherwise it will increase the cost of purchasing the water pump. It should be selected according to the needs, such as the self-priming water pump used by the user's family, the flow rate should be selected as small as possible; such as the submersible pump used by the user for irrigation, the larger flow rate can be selected appropriately.
1. Choose water pumps according to local conditions. There are three types of commonly used agricultural water pumps, namely centrifugal pumps, axial flow pumps and mixed flow pumps. Centrifugal pumps have a high head, but the water output is not large, and are suitable for mountainous areas and well irrigation areas; axial flow pumps have a large water output, but the head is not too high, and are suitable for use in plain areas; the water output and head of mixed flow pumps are between centrifugal pumps Between the pump and the axial flow pump, it is suitable for use in plains and hilly areas. Users should choose according to the local conditions, water source and water lifting height.
2. Choose water pumps that exceed the standard properly. After determining the type of water pump, its economic performance should be considered, and special attention should be paid to the head and flow of the water pump and the selection of supporting power. It must be noted that there is a difference between the head (total head) indicated on the water pump label and the water outlet head (actual head) during use, because there will be a certain resistance loss when the water flows through the water pipe and the vicinity of the pipeline. Therefore, the actual head is generally 10%-20% lower than the total head, and the water output is also reduced accordingly. Therefore, in actual use, it can only be estimated according to 80% to 90% of the head and flow rate noted on the label. The choice of supporting power for the water pump can be selected according to the power indicated on the label. In order to make the pump start quickly and use safely, the power machine The power can also be slightly greater than the required power of the water pump, generally about 10% higher; if you have power, when purchasing a water pump, you can choose a matching water pump according to the power of the power machine.
3. Strict procedures are required to purchase water pumps. When purchasing, it is necessary to check the "three certificates", namely the agricultural machinery promotion license, production license and product inspection certificate. Only the three certificates can avoid the purchase of obsolete products and inferior products.