| 摘要 |
<p>A safety and regulation valve unit for a gas installation, particularly a heating installation, comprises a duct (2) through which the fuel can flow between an inlet (4) and at least one outlet (6,8). On-off fuel-valve means (10) are interposed in the duct (2) between the inlet (4) and the at least one outlet (6,8), and there is a movable device (18) for controlling the valve means as well as actuator means acting on the movable device in order to move it towards a first operative position in which it cooperates with the on-off valve means (10) in order to put the inlet (4) into communication with the outlet (6, 8). The actuator means comprise a reversible motor (20) with a rotor (22) connected to a male-and-female screw (24a,26) coupling acting on the movable device (18) to translate it towards the first operative position and to control the on-off valve means (10). <IMAGE></p> |
