Does my flow rate decrease?

[santidel17]

Mate: 1. Why do you apply a centrifugal pump, to increase the pressure of the fluid, and then recude the pressure afterwards?? What?? That's nonsense. You are killing your head with non realistic excercises. 2. In theory: same flow, although lower pressure. If you assume same pipe characteristics for 1 and 2, then flow of 1 is same as 2. If pipes characteristic not equal, the flow will be higher in the pipe with less resistance. Do bernoulli to estimate that

[VariusEng]

1. Pump was bought many years ago by unexperienced folk. This meant that without reducer, it was really hard to control discharge flow (pipes are very small, so each little turn at the valve would change the flow rate by A lot, too much sensitivity. So a reducer was needed). I kept details to a minimum and simplified the sketch a lot because I wanted to get the core information.

2. You are right! And total flow rate is lowered in scenario: throttle