The outlet pressures of the two parallel multi-stage centrifugal pumps are different
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Two multi-stage centrifugal pumps are connected in parallel; after they start operating, there is a pressure difference of 1 kilogram between the outlets of the two pumps. Will the pump with the lower pressure stop working? I would appreciate it if everyone could analyze this for me
First, check whether there is any deviation in the reading of the pressure gauge at the pump outlet
We have two pumps, one with a pressure of 0.8 MPa and the other at 2.2 MPa, which serve as backups for each other; they are frequently switched between use, and have also been operated in parallel. When operated in parallel, the flow rate is greater than that of either pump when used alone. It can work once adjusted properly.
Same pipeline for inlet, same pipeline for outlet
Are the models of the two pumps the same? Are all their parameters identical?
The two pumps are connected in parallel; the pump with lower pressure does not operate. Over time, this pump may also suffer from cavitation. As the internal pressure increases slightly, you will see the outlet pressure gauge rise and then fall again, in such a cycle (this is something I have experienced). What is the opening degree of the outlet valves on your two pumps currently? Are they fully open? If not, they can still be adjusted further.
It depends on the pressure in your downstream system. If the pressure at the pump outlet is not much different from that pressure, it’s possible that low outlet pressure will prevent liquid from flowing out. If the pressure difference between the two is significant, then parallel operation is no problem. Also, if there is a flow meter on the outlet pipe, you can determine the situation by checking the flow rate~~
Are the parameters of the two pumps the same? How is the piping layout?
The pump parameters are the same, and the inlet and outlet pipes are very close to the pump; I suspect that the pressure gauge may not be accurate
The pump parameters are the same, and the inlet and outlet pipes are very close to the pump; I suspect that the pressure gauge may not be accurate