Connecting two water pumps in series will not yield a total output of 200 PSI unless the second pump is designed to handle the input pressure of 100 PSI from the first pump. Each pump adds 100 PSI to the input flow, but the design limitations of the second pump must be considered. In parallel configuration, the flow rate is halved while the pressure remains at 100 PSI for each pump, making it suitable for applications requiring lower flow rates. Positive displacement pumps are recommended for both configurations due to their ability to manage pressure differentials effectively.
PREREQUISITESEngineers, fluid dynamics specialists, and anyone involved in the design or operation of water pumping systems will benefit from this discussion.
Thanksjack action said:That is the theory. The pump rating is a pressure differential, which means it adds 100 psi to the input flow. But the second pump design must be able to handle the 100 psi @ the given flow rate for its input flow. Pump design is important for limitation on the maximum pressure. Positive displacement pumps are generally better suited for such an approach.
In parallel, the flow rate is divided by 2 but the pressure increase stay the same for both pumps, i.e. 100 psi. So you could use smaller pumps because the flow rate is smaller for each one.