BUTTERFLY VALVES METAL TO METAL SEAL :: VALVE OPERATIONS The METAL POWER range is operated through an irreversible control that ensures the maintenance of the pressure on the seal when the valve is closed. Our valves are suitable for the following kind of actuators: Manual gear through reducer equipped with handwheel; Electric equipped with reducer Pneumatic with double or simple effect Hydraulic with double or simple effect Upon specific request of the customer we can supply operation systems different from those here above indicated or equipped following the customer requests. In order to grant a perfect functioning of the valve MMVI carries out the calibration and assembling of the valve directly into its factory.