BALL VALVES :: FULLY WELDED TRUNNION MOUNTED :: FEATURES CONSTRUCTIVE VERSIONS The ball valves TRUNNION FULLY WELDED range can be manufactured with the following connection: - BUTTWELDING with two welding bevels made in accordance with standard and with the customer   requests. The welding bevels are equipped with centering ring for the positioning and line welding; - FLANGED with flanges at the two ends. - RTJ.