How to buy a water pump:
(1) The selection of the pump should meet the requirements of the pump station design flow, design head and water supply and drainage in different periods.
(2) At the average head, the pump should run in the high-efficiency area; at the highest and lowest head, the pump should be able to run safely and stably without leaving the working range of the pump’s high-efficiency area. Under various working conditions of the design standard, the pump unit does not appear cavitation, vibration and overload.
(3) The pump type selection should select the pump type with good performance, wide high-efficiency area, and suitable for the change of head and flow of the pumping station. The series products recommended by the state are preferred. When the series of products cannot meet the requirements, new products can be developed and trial-manufactured according to the prescribed procedures. For pumping stations with large head variation, pumps with steep H-Q curves should be used; for pumping stations with large flow changes, pumps with gentle H-Q curves should be used.
(4) When selecting the pump, it should be noted that the selected model and number of pumps should minimize the construction cost of the pump station (the sum of equipment cost and civil investment), and be easy to construct, operate, maintain and manage.
(5) For the cascade pumping station, the model and number of pumps should ensure the flow coordination requirements between the upper and lower pumping stations, and try to avoid or reduce the insufficient flow or excessive flow of the lower pumping station due to improper flow coordination. water.
(6) For axial-flow pumps and mixed-flow pumps with a water pump impeller diameter greater than 1600mm, the device model test data should be available; when major changes are made to the shape line of the over-current components, the device model test should be performed again.
(7) The selection of water pump should take into account the characteristics of comprehensive utilization and development of water conservancy as much as possible.
When buying a water pump, you should pay attention to the following points:
1. The requirements of pump flow and pump head (or pressure) must be met according to the needs of production:
2. The water pump should operate within the high-efficiency range;
3. In the long-term operation of the water pump, the pump station has higher efficiency, less energy consumption and lower operating costs;
4. According to the selected model and number of pumps, the station is built, and the project investment is less;
5. The pump unit can operate normally and safely under various working conditions of the design standard, that is, cavitation, vibration and overload are not allowed;
6. The type of water pump that is convenient for installation, maintenance and operation management should be selected when the water pump is selected.
Post time: 2022-01-08
