A water pump is a machine that transports liquids or pressurizes liquids. It transfers the mechanical energy or other external energy of the prime mover to the liquid to increase the energy of the liquid. It is mainly used to transport liquids including water, oil, acid and alkali liquids, emulsions, suspoemulsions and liquid metals. It can transport liquids, gas mixtures and liquids containing suspended solids. The technical parameters of pump performance include flow, suction, lift, shaft power, water power, efficiency, etc.; according to different working principles, it can be divided into volumetric pumps, vane pumps and other types. A positive displacement pump uses the change in the volume of its working chamber to transfer energy. So do you know how to choose its number? Let’s follow the editor of Д245 Water pump to understand it briefly!
1. Generally, only one pump is used for normal operation, because a large pump is equivalent to two small pumps working in parallel (referring to the same head and flow), and the efficiency of the large pump is higher than that of the small pump, so it is rather energy-saving. Choose a large pump instead of two small pumps, but in the following situations, consider two pumps to cooperate in parallel: the flow rate is too large, and one pump cannot reach this flow rate.
2. For large pumps that need a 50% standby rate, two smaller pumps can be changed to work, and two standby (four in total)
3. For some large pumps, pumps with 70% flow requirements can be selected for parallel operation, instead of standby pumps. When one pump is overhauled, the other pump still bears 70% of the production.
4. For pumps that need to run continuously for 24 hours, three pumps should be reserved, one for operation, one for standby, and one for maintenance.
In summary, the editor of Д245 Water pump tells: A brief introduction to the selection of the number of water pumps, you can learn more.