procurement of reverse osmosis membrane , reverse osmosis membranes (low fouling) filmtec ft 30 or eqvt. to filmtec make. spec: thin film composite poly amide reverse osmosis membrane for use in brakcish water dimension: 8 x 40 type: spiral wound salt rejection: 99.4% surface area: 400 sq.ft. (min.) feed spacer thickness: 34 (mil) membrane surface charge: neutral permeate flow/membrane m3/d - 43 maximum operating pressure: 600 psi maximum operating temperature: 45º c ph range, continuous operation/cleaning: 2 to 11 maximum element pressure drop: 15 psi free chlorine tolerance : <0.1 ppm maximum feed silt density index (sdi) : sdi 5 feed inlet pressure at 1st stage during gtr : 11 kg/cm2 (max) note : the above quantity includes 5 nos. of spare membranes also spare such as end connectors, end covers ‘o’ rings are to be supplied along with the membranes