GATE VALVES / BUTTERFLY OS&Y GATE VALVE Z81 VALV.OS&Y ZAYX POSTE IND. HORIZ. GISA-720-W GISA-720-W (POSTE IND.) VALV.GISA-430-FF (Z41X) GATE VALVE FLANGED GISA-400-FF (MOD. Z41) VALV.MARIP.BRIDA GISA-800-W (371X) VALV. MARIP.RAN.GISA-900-G (381X) VALVULA RETEN. RAN. H84X VALV. GISA-101-FF (Z45X)