Did the pressure drop suddenly during the pump reversal?
Thread Content
During the pump reversal process, stop Pump 1 and start Pump 2. When two pump valves were opened, the pressure remained around 5 kilograms (the upper limit), but as the valves were opened further, it suddenly dropped to 1 kilogram; this phenomenon had never been encountered before. After that, I turned the valve down a bit, and the pressure returned, but it was still around 5 kilograms. A gradual drop in pressure is understandable, but a sudden drop like that is confusing, right? I hope friends can help analyze what the reason is?
It shouldn’t be normal; analyze the process conditions of the medium, such as whether it is viscous or contains condensable gases.
Poor exhaust; material suddenly enters the pipeline
What medium is it? Is it highly corrosive? Corrosion is present at the impeller flow passage area, or the gasket clearance and return hole dimensions are excessive
Is there any large space inside the pipeline, has the inlet pressure changed, and has the flow rate changed?
Pump number one should be stopped, right? It seems there might be air behind your pump! Generally, it is necessary to vent air before starting the pump!
This phenomenon does occur: the pressure can no longer be maintained. The gas aspect is indeed taken into consideration; why is it that everything works fine when it’s turned on, but the pressure drops as the outlet valve is opened wider?
Check whether the valve on the outlet pipeline of Pump 1 is closed
No, it’s two of us operating it: he shuts down pump No. 1 while I start pump No. 2; he shuts it down and I start it at the same time.