Dear Sir, This is reference to the subsequent discussion we had in previous week, regarding the tank capasity...uploaded PID for FFE system in which feed buffer tank (R1) hold up capasity 200 lit, feed rate to the FFE is 340 lit/hr,almost half an hour resident time.As this is a continuous process please review the feed tank capasity.Also review the hold up capasity for R3 and R4 (50 lit each), for these receiver resident time is one and half hr.You have to check hold up receiver capasity according to operation philosophy. 