The conversion done on that graph is done by the little black box where it all connects in the middle...the conversion factors are there for anyone who wants to make their own controller (I suppose ).

Your flowrates are as such:
D5 1st speed 1.32 l/min (.35GPM)
D5 2nd speed 1.81 l/min (.48GPM)
D5 3rd speed 2.4 l/min (.63GPM
D5 4th speed 3.08 l/min (.81GPM)
D5 5th speed 3.86 l/min (1.02GPM)




(btw, that's a lot of QDCs in your loop! )