How To Choose A Water Pump

The flow rate of the water pump, that is, the water output, is generally not suitable to be chosen too large, otherwise it will increase the cost of purchasing a water pump. It should be selected according to needs. For example, for self-priming water pumps used in users' homes, the flow rate should be as small as possible; for example, submersible pumps used for irrigation by users, one with a larger flow rate can be appropriately selected.
1. Choose a water pump according to local conditions. There are three types of commonly used agricultural water pumps, namely centrifugal pumps, axial flow pumps and mixed flow pumps. The centrifugal pump has a higher lift, but the water output is not large, and is suitable for mountainous areas and well irrigation areas; the axial flow pump has a larger water output, but the lift is not too high, and is suitable for use in plain areas; the water output and lift of the mixed flow pump are between those of the centrifugal pump and axial flow pumps, suitable for use in plains and hilly areas. Users should choose according to the local terrain conditions, water sources and water lifting height.
2. Select a water pump that exceeds the standard appropriately. After determining the type of water pump, its economic performance must be considered, and special attention must be paid to the lift and flow of the water pump and the selection of its supporting power. It must be noted that there is a difference between the head (total head) indicated on the water pump nameplate and the water discharge head (actual head) during use. This is because there will be a certain resistance loss when the water flows through the water pipe and near the pipe. 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 based on 80% to 90% of the head and flow indicated on the signboard. The power of the water pump can be selected according to the power indicated on the signboard. In order to make the water pump start quickly and use safely, the power machine The power can also be slightly greater than the power required by the water pump, generally about 10% higher. If you already 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 must be followed when purchasing a water pump. When purchasing, you must check the "three certificates", namely the agricultural machinery promotion license, the production license and the product inspection certificate. Only with all three certificates can you avoid purchasing obsolete products and inferior products.