Design Institute equipment in the design, to determine the multi-stage pump usage and performance parameters and select the pump. This choice must first choose from the type and form of pump to start, what principle to choose multi-stage pump, the choice is based on what is it? 1. Make the type and performance of the selected multistage pump comply with the process parameters such as device flow, lift, pressure, temperature, NPSH, suction and so on. 2, multi-stage pump must meet the requirements of the characteristics of the medium: a. For the transmission of flammable, explosive toxic or precious medium pump requires shaft seal reliable or non-leak pump, such as magnetic pump (no shaft seal, Magnetic indirect drive); b for the transmission of corrosive media multistage pumps, convection parts require corrosion-resistant materials, such as fluorine plastic corrosion-resistant pump; c. For conveying solid particles containing the medium pump, convection parts require the use of Wear-resistant material, if necessary, seal with a cleaning liquid rinse. 3, the mechanical requirements of multi-stage pump high reliability, low noise, small vibration. 4, Correct calculation of multistage pump procurement input costs, including procurement costs and installation and maintenance costs.
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