What are the ways to reduce the head of a centrifugal pump? Pumps that have been installed
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What are the ways to reduce the head of a centrifugal pump? Pumps that have been installed
Cutting impeller, speed change, suction impeller, outlet diversion and pressure reduction
Your question isn’t very clear. Has the pump been installed already? Was it found that the rated head of the pump is too high and needs to be reduced, or was it found that the rated head is too low and the head required by the system during operation needs to be decreased? If it is the former case, follow the steps mentioned on the second floor; if it is the latter case, measures such as increasing the diameter of the inlet and outlet pipes, raising the liquid level on the inlet side, increasing the pressure in the gas space on the inlet side, lowering the liquid level on the outlet side, and reducing the pressure in the gas space on the outlet side can be taken.
Thank you. Isn’t the impeller used for cutting generally intended to regulate flow rate? Can it also be used to regulate pressure?
Can be used: Cutting impeller； The drive equipment (motor frequency conversion, turbine speed reduction) reduces the speed ； Open the outlet valve wider to increase the flow rate.
If the rated head of the pump is chosen to be a bit too high, it can still be used, though some energy will be wasted on the valves.
Cutting the impeller can adjust the head, while adding a return circuit can reduce the head
Cutting the impeller is the cheapest option. Energy consumption can also be reduced after cutting, but there is a certain limit to the reduction in head caused by cutting the impeller; it is advisable to consult the manufacturer regarding specific pump models and parameters.