1. The use of pump type selection of pump type
According to determine the design head and design flow, in the selection table, horizontal header check identify and design of lift in conformity with or close to the head of the numerical; and in the vertical header finds out and design flow are consistent or similar flow numerical, Criss Cross in small squares, it marked the types of pumps, pump shortlisted type. But sometimes there are two types of pump to meet the design requirements, at this time, the two types of pump can be compared to the program for technical and economic analysis, and then select one of the appropriate pump type. This method is relatively simple and quick way to choose the pump.
2. The use of pump performance integrated pump type spectrum
The working area of the centrifugal pump, axial flow pump and mixed flow pump are all drawn together in the same map, which constitutes a series of comprehensive spectrum of agricultural water pump. The drawing is more complicated, but the use is convenient. According to the established design flow and design of lift, in the type spectrum, first of all on the ordinate to design the head to find out with lift requirements, and the flow ranging from a few pumps, then on the abscissa in order to design the flow to determine what a kind of pump selection. If the design flow is large, single pump failed to meet the requirements, can consider multi machine operation, but should pay attention to the use of the same model of the pump, in order to facilitate the construction and installation, management and maintenance.
3. The use of pump performance specifications pump type pump
Pump factory in the product catalog are provided in this form, the performance of each model in the table have three lines of data, which is exactly what kind of behavior? General design flow and design of lift should be tables and performance listed in the middle of numerical consistent, or close to, and must off the in, two lines at the bottom of the range, because the range of efficient operation of the pump region, this type of pump that conforms to the actual need, pump selection count is set.
