At first glance, this may seem strange. In fact, in real life, there are many things we use to work in series, but we just don't pay attention to it. So, under what circumstances can self balancing multi-stage pumps be connected in series, and how can they be connected in series?
Can self balancing multi-stage pumps work in series?
If you want to work in series, you first need to ensure that the characteristics of these two self balancing multi-stage pumps are the same. When two self balancing multi-stage pumps with the same characteristics work in series, there is generally no problem. What if two self balancing multi-stage pumps with different characteristics are connected in series? Has the traffic increased for Yang Cheng?
It cannot be simply assumed that when the total head curve of these two self balancing multi-stage pumps is lower than the pump head curve in the flow range, it means that the total head will be lower than the head of one of the pumps. At this time, the outlet of the multi-stage centrifugal pump will no longer have a positive head, but instead become the suction resistance of the pump. The increase in suction resistance and changes in suction performance will directly lead to cavitation of the self balancing multi-stage pump.
If a multi-stage centrifugal pump must be used as the first stage in series operation, then the pump becomes a resistance on the discharge side, and the head after series connection will also be lower than that of a single pump. This is the abnormal operating state of what we often refer to as a self balancing multi-stage pump. So when we want multi-stage centrifugal pumps to work in series, we must choose the appropriate type and use them correctly.
