low pressure brackish water desalination 2.5 inch RO membrane 1.Rejection 99% 2.GPD:800 3. BW, LP, ... XLE,TW series optional low pressure brackish water desalination 2.5 ... of feed water pH value of chemical cleaning …….2 to 11Max pressure drop of single out membrane …………….. ... .25series adopt the pressure vessel whose diameter is 2.5inches ,40 series 4.0inches and 80 series ...