Flow adjustment problems of large flow pumps
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The rookie asked weakly: If a water pump with a rated flow of 100 cubic meters operates at 50 cubic meters for a long time, apart from the energy consumption, how much damage will be done to the pump itself? I have a lot to choose from, but my boss doesn’t want to replace the pump and add a bypass. I’m helpless.
There is no damage to the pump, but the energy consumption is high
If 50 is higher than the minimum flow allowed by the pump, it is just a low efficiency. At the same time, the long-term deviation of the pump from the maximum efficiency point will definitely have an impact on the long-term operation of the pump. The bypass is not a good adjustment method and wastes energy. It is recommended to use variable frequency speed regulation, which is good for the pump and energy saving.
Reply 1# EdwardLau Personal opinion: If the water temperature is not high, it will have little effect on the pump. If you want to use it at a low flow rate for a long time, you can consider using a frequency converter to reduce the frequency (but the outlet pressure must meet your system requirements), or you can ask the manufacturer to turn the impeller diameter and reduce the impeller diameter. In fact, if you use it to increase a return flow, if the pipeline pressure level is sufficient, then close the outlet valve a little, and it should be OK.
It shouldn't have any impact. Why doesn't your boss consider the money wasted on several new pumps due to long-term use (perhaps considering expanding production in the future? )? It is recommended to add a frequency converter.
When the flow rate decreases, the pressure will definitely increase, the entire rotor will be in an unbalanced state of axial force, and the thrust bearing will wear faster.
The pump shouldn't have any impact but it's not very efficient.