HYDROPNEUMATIC ELEMENT FOR SPECIAL MACHINES; COMPONENT: MEMBRANE; MACHINE: REVERSE OSMOSIS EQUIPMENT; ACTIVE AREA: 41 M2, THICKNESS 28 THOUSAND, FLOW 48 M3/D, TYPICAL STABILIZED SALT REJECTION (%): 99.3, ; BRAND 1: FILMTEC DOW; N-PART 1: BW30HRLE-440I