The issue with pump outlet pressure
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I would like to ask about pumps: due to process requirements that call for an increase in outlet pressure, whether it’s a centrifugal pump or a positive displacement pump, is it possible to increase only the outlet pressure of the pump without changing its flow rate?
If it is a centrifugal pump, increasing the outlet pressure will definitely cause a change in flow rate； For positive-displacement pumps, the flow rate remains unchanged, assuming that the increase in pressure does not lead to a significant increase in internal leakage.
Centrifugal pumps have an impact, while positive displacement pumps do not.
Positive displacement pumps have this characteristic, but equipment intrinsic safety must also be taken into account!
Increased export pressure results in a significant decrease in the flow rate of centrifugal pumps. In the case of volume pumps, the flow rate also decreases when the viscosity of the material is low, but the decrease is not as significant