The flow rate of the pump, that is, the water output, generally should not be selected too large, otherwise it will increase the cost of purchasing the pump. It should be selected according to needs. For example, the self-priming water pump used by the user's home should have a smaller flow rate; such as the user's submersible pump for irrigation, a larger flow rate can be appropriately selected. Let’s follow the editor of ДT-75 Water pump to learn more!
1. Purchase water pumps according to local conditions. There are 3 types of commonly used agricultural water pumps, namely centrifugal pumps, axial flow pumps and mixed flow pumps. The centrifugal pump has a high head, but the water output is not large, so it is suitable for mountainous areas and well irrigation areas; the axial flow pump has a large water output, but the head is not too high, and is suitable for use in plain areas; the mixed flow pump has a water output and a head that is between that of a centrifugal pump It is suitable for use in plains and hilly areas between the axial flow pump. Users should choose according to the land conditions, water source and lifting height.
2. To properly select the pump for exceeding the standard. After determining the type of water pump, its economic performance should be considered, and special attention should be paid to the selection of the pump's head and flow and its supporting power. It should be noted that the head (total head) indicated on the pump label is different from the 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 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 based on 80% to 90% of the head and flow stated on the label. The power selection of the pump can be selected according to the power indicated on the label. In order to make the pump start quickly and use safe, the power machine is The power can also be slightly larger than the power required by the pump, generally about 10% higher; if you have power, you can choose a matching pump according to the power of the power machine when you buy a pump.
The above is the editor of ДT-75 Water pump: how to buy a water pump, I hope it can help you.