Just make sure your flow meters are in the correct range for sap. Your pump will not exceed the pump Ratings as you do a wash cycle. Even if the total pump flow in a wash cycle exceeds the flow meter, it will just lift the indicator to the top but it will allow some extra flow. However, I doubt that will be an issue, even in a wash cycle you adjust the pressure to force the flow thru the membrane, that back pressure reduces the flow.
Ekrueger, you seem to have the gpm and gph confused. The flow meters used on a maple RO will show gpm (gal per minute) not gph (gal per hour).
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.