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In recent years, with the adjustment of agricultural structure, peasants have made full use of low-slope gentle slope and wasteland resources to develop high-efficiency agriculture on a large scale. However, these plots are often difficult to irrigate with irrigation. Need to buy water pumps for irrigation. So, how to buy a suitable agricultural pump it? The following tips for farmers friends reference. First of all, according to local conditions to buy pumps. Commonly used agricultural pumps have three types, namely centrifugal pumps, axial pumps and Francis pumps. Centrifugal pump higher head, but the water is not large, suitable for mountain and well irrigation area; axial pump large amount of water, but the lift is not too high, suitable for use in plain areas; Francis pump water and head lift between the centrifugal pump And axial flow pump, suitable for plain and hilly areas. Users should according to the local conditions, water and water to buy height. Second, we must properly exceed the election pump. After determining the type of pump, to consider its economic performance, with particular attention to the pump head and flow and the choice of supporting power. It must be noted that there is a difference between the head (total head) indicated on the pump label and the head of water (actual head) when it is used, as there is a certain loss of resistance when the water flows through the pipe and the pipe. Therefore, the actual head is generally 10% -20% lower than the total head, the amount of water is also reduced accordingly. Therefore, the actual use, only by the signs of the head and flow rate of 80% to 90% estimated that the pump supporting the power of choice, according to the signs indicated on the power of choice, in order to make the pump start quickly and use safety, power machine Power can be slightly larger than the pump power required, generally higher than about 10% is appropriate; if there is power, when purchasing a pump, you can press the power of the power machine to buy matching pump. Finally, we must strictly follow the purchase of pumps. When purchasing a pump to be tested "three cards", that is, agricultural machinery to promote permits, production permits and product inspection certificate, only three cards all can avoid the purchase of obsolete products and inferior products.
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