"Crank it up to 200 psi with cold permeate after rinsing with 100 gallons and post results.
You should be getting over 1.25 or 1.5 gpm permeate at 200 + psi.
I'll check what my benchmark was for my membrane. But I think it was 4-1 at 200 psi with cold permeate.
So that means at 200 psi I was getting 4 gallons concentrate to 1 gallon permeate."
When you do your benchmark for the membrane, the instructions for my machine stated to set the PSI at 200, run the machine until the water heats up to 75 degrees, then check your flow and record the flow rate for daily comparison. If you have more than one membrane, you should have separate flow meters for each membrane to check the individual flow rates. Then as you do your daily bench mark, you can notice when the flow drops enough (10-15%) to need to a citric acid wash.
Joe
2004- 470 taps on gravity and buckets
2006- 590 taps on gravity and buckets 300 gph RO
2009- 845 taps on vacuum no buckets, 600 gph RO
2010- 925 taps on vacuum new 2 stage vacuum pump
2014- 3045 taps on vacuum, new 1200 gph RO
2015- 3104 taps on vacuum
2017- 3213 taps on vacuum
3' x 10' oil fired evaporator with steamaway