A TWO-SHUTTER VALVE

摘要

The present invention provides a valve comprising a body (1) defining first and second ducts (3, 4) that open out into a third duct (2) and that are provided respectively with a first shutter (5) and with a second shutter (15) connected to drive means arranged to move the shutters in: a normal mode of operation in which the second shutter is in the closed position and the first shutter is adjustable in position between an open position and a first closed position; a stop mode in which the second shutter is in its closed position and the first shutter is in its first closed position; and a secondary mode of operation in which the second shutter is in its open position and the first shutter is in a second closed position.