From the analysis of the performance curve of centrifugal pumps, it can be seen that opening the outlet valve reduces the outlet pressure while increasing the flow rate; simultaneously, the pump current also increases. I would like to ask everyone: for a pump with a flow rate of 200 M3 and an outlet head of 50 meters, what happens to the flow rate when the outlet valve is opened?
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Conversion of centrifugal pump flow rate and head
I’m sorry; there’s a problem with my phone. If we increase the flow rate to 240 M3, can we calculate it this way? If 200 M3 of flow corresponds to 50 meters of head pressure, then 200 ÷ 50 equals 4 M3 per meter of head pressure. If the flow rate is increased to 240 M3, the head pressure will decrease by 10 meters. So, for a head pressure of 40 meters, the flow rate would be 240 M3. Can everyone estimate the flow rate and head pressure in this manner? ??????
200 M3 corresponding to a head of 50 meters is the head associated with the rated flow rate
It is not a direct proportional relationship. It’s a curve
It is not a directly proportional relationship; this change follows a curved path, with the head being around 46-47 when the volume is 240 cubic units
Once the flow rate is determined, pumps are generally tested upon leaving the factory, ensuring that they can meet the rated operating conditions specified by the customer； You can adjust the opening degree of the outlet valve based on the outlet pressure gauge; when the pressure is 0.5 MPa, the flow rate is around 200 cubic meters