Ratio-Selector RS817/818 Adjustable, 2-Way Proportioning Valve for Hopper Loaders. • Simple to install • Conveyance of 2 materials • Individual adjustment of conveying intervals for valve 1 and valve 2 • Simple mixing technique for regrind usage • Connected to the control of the Con-Evator • Cast aluminium construction M8 185 165 140 330 89 206 117 M8 RATIO SELECTOR B A A B 231 95 115 95 CON-EVATOR 90 105 Principle drawing RS 817/818: 100 231 165 45 Ø8 A B 817-3200 Ø32 mm Ø38 mm 817-3800 Ø38 mm Ø38 mm 818-4500 Ø45 mm Ø51 mm 818-5100 Ø51 mm Ø51 mm Electric control - easy and simple to operate....