... outlet of the valve to realize double-block functions.Hot tags: Trunnion Ball Valve, China, mill, manufacturer, supplier, factory, wholesale, cheap Forged Trunnion Ball ValveHuachao Forged steel ... : -196℃-540℃Seat material: PTFE, RPTFE, NYLON, DEVLON, PEEK, PPL, Metal hard seatConnection: Flanged, welded endsDrive device: handle worm, motor-drive ...