1/2" AC2271XTD JAMESBURY THREADED CHLORINE BALL VALVE, CARBON STEEL BODY, MONEL BALL & STEM, PTFE SEATS & SEALS,FOR CHLORINE SERVICE WITH SLIDE LOCK LEVER HANDLE, RATED FOR 0.50 PPM, UNIQUE SEALING DESIGN, FLEXIBLE-LIP SEATS VENT CHLORINE SAFELY TOWARD THE HIGH PRESSURE (UPSTREAM) SIDE OF THE VALVE. METSO # MA0003757