Principles for selecting pumps

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Selection principles 1. Ensure that the type and performance of the selected pump meet the requirements of the process parameters such as flow rate, head, pressure, temperature, net positive suction head, and suction lift of the installation. 2. The requirements of the medium’s properties must be met. For pumps used to transport flammable, explosive, toxic, or valuable fluids, reliable shaft seals are required, or leak-free pumps such as magnetically driven pumps, diaphragm pumps, and shielded pumps should be used. For pumps handling corrosive fluids, the components involved in the flow process need to be made of corrosion-resistant materials. For pumps that transport media containing solid particles, it is required that the convective components be made of wear-resistant materials, and where necessary, the shaft seals should be flushed with a clean liquid. 3. High reliability in terms of mechanics, low noise, and minimal vibration. 4. Economically, it is necessary to comprehensively consider the total cost of equipment expenses, operating costs, maintenance costs, and management fees to minimize it. 5. Centrifugal pumps feature high speed, small size, light weight, high efficiency, large flow rate, simple structure, pulse-free fluid delivery, stable performance, ease of operation, and convenient maintenance.