Once the design flow and design lift of the pumping station have been established, the relevant technical chart can be used to determine the type and specification of the pump. The method is as follows: 1. Using the Pump Performance Specifications The Pumping Pump Plant provides this in the product catalog Kind of form, the performance of each model in the table has three lines of data, what kind of behavior? The general design flow and design head should be consistent with the values ​​listed in the middle of the performance table or close to each other and must fall within the upper and lower two lines as this range is a high efficiency area for pump operation, This type of pump is considered to meet the actual needs of the pump is selected. 2. The use of pump performance integrated spectrum Pump Selection Centrifugal pump, axial flow pump, mixed flow pump all the work area integrated drawing on the same map, which constitutes a comprehensive spectrum of agricultural water pump spectrum, the drawing comparison Complex, but more convenient to use. 3. Use pump selection table Pump selection According to the design of the lift and design flow, in the selection table, the horizontal header to find the head of the design consistent with or close to the value of the lift; and then identify the vertical header and Design flow rate consistent with or close to the value of traffic, vertical and horizontal intersection in small box, which marked the pump model, the initial selection of pump. But sometimes there are two types of pumps to meet the design requirements, this time, the two pumps can be compared for the program, the technical and economic analysis, and then select one of the appropriate pump. This choice of pump method is relatively simple and fast.