Principles and steps of pump selection

      Pump is a kind of general-purpose mechanical equipment, which is widely used in petroleum, chemical industry, electric power metallurgy, mining, ship selection, light industry, agriculture, civil and national defense departments, and occupies an important position in the national economy. According to statistics in 1979, the output of pumps in China reached 1.256 million units. The electric energy consumption of pumps accounts for more than 21% of the national electric energy consumption. Therefore, it is of great significance to reduce the energy consumption of pumps to save energy.

     In recent years, our pump industry has designed and developed many energy-saving products, such as IHF, CQB, FSB, uhB and other types of pump products, which has played a positive role in reducing the energy consumption of pumps. However, in various fields of the national economy, due to the unreasonable selection of the pump, many pumps are in unreasonable operation, low operation efficiency and waste a lot of energy. Some pumps can not be used because of unreasonable selection, or the maintenance cost is increased and the economic benefit is low. Therefore, reasonable pump selection is of great significance to energy saving.

     The so-called reasonable pump selection is to comprehensively consider the investment and operation cost of pump units and pump stations and other comprehensive technical and economic indicators, so as to make them conform to the principles of economy, safety and applicability. Specifically, there are the following aspects:

     It must meet the requirements of flow rate and head, that is to say, the operation time point (the intersection point of device characteristic curve and pump performance curve) should always be kept in the effective range, so as to save power and not easy to damage parts.

     The selected pump should not only be small in size, light in weight and cheap in cost, but also have good characteristics and high efficiency.

    It has good anti cavitation performance, which can not only reduce the excavation depth of the pump house, but also prevent the pump from cavitation, so that the operation is stable and the service life is long.

According to the selected pump station, the project investment is less and the operation cost is low.

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