In recent years, with the adjustment of agricultural structure, farmers make full use of low mountain slope and wasteland resources, and develop high-efficiency agriculture in large area, but these plots are often difficult to irrigate by themselves. The need to buy water pump irrigation. So, how to choose suitable agricultural water pump.
First of all, to local conditions to buy water pumps. The commonly used agricultural water pump has 3 kinds, namely centrifugal pump, axial flow pump and mixed flow pump. Centrifugal pump head is higher, but the amount of water is not large, suitable for mountainous areas and well irrigated areas; axial pump output is larger, but the head is not too high, suitable for use in plain area; the effluent of the mixed flow pump is between the centrifugal pump and the axial flow pump. Users should be based on local conditions, water and the height of the water to buy.
Second, the appropriate excessive selection of water pumps. To determine the type of pump, it is necessary to consider its economic performance, especially to pay attention to the pump head and flow and the choice of supporting power. It must be noted that the pump signs on the head (total lift) and the use of the water lift (actual lift) is different, this is due to water flow through the water pipe and the vicinity of the pipeline will have some resistance loss. Therefore, the actual lift is generally lower than the total lift of 10%-20%, the amount of effluent is also reduced correspondingly. Therefore, when the actual use, can only according to the signs of the head and flow of the $number estimate, pump matching power selection, according to the signs on the power selection, in order to enable the pump to start quickly and use safety, the power of the machine can be slightly greater than the pump power required, generally higher than 10% or so appropriate;
Finally, the strict procedures to buy water pumps. The purchase of water pumps also need to check "three certificates", that is, agricultural machinery promotion license, production license and product inspection certificate, only three complete party can avoid the purchase of obsolete products and inferior products.