Problem of vacuum breakdown under pressure load in centrifugal water pumps
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One of the centrifugal water pumps in our factory has a flow rate of 3500 m3/h. We try to adjust the load by closing the outlet valve, but when this is done, the pump starts to run dry. Could everyone please help analyze the reason for this issue?
This post was last edited by bfdlwolf on 2018-11-21 at 12:51. When the pump’s operating flow rate is below 30% of its rated value, a radial thrust is generated. Moreover, since the pump operates at low efficiency, the liquid temperature at the pump inlet rises, increasing the vapor pressure and making cavitation more likely to occur. It is estimated that cavitation is occurring in the pump. Solution: 1. Set and activate the low-flow line of the pump, 2. Reduce the resistance at the pump inlet
What does it mean when a water pump operates in empty-pump mode? I don’t understand:dizzy:
It is recommended to install a pressure gauge at the outlet to monitor the pump pressure and prevent cavitation
The flow rate is below the minimum value required for thermal control; as a result, the liquid temperature rises and it vaporizes