| 摘要 |
<p>The invention relates to a device for controlling a flow of a gas in a pipe (1), including a valve (2) provided with an actuator (3), the valve (2) being configured such as to selectively seal the pipe (1), characterised in that the movement of the valve (2) is controlled by the resultant of the pressure upstream from the valve (2) in the pipe (1) which is exerted on a proximal surface (21) of the valve (2), and a control pressure applied to a distal surface (22) of the valve (2), which is larger than the proximal surface (21) of the valve (2), said control pressure being established in an amplification chamber (31) provided with a supply line (41) and a bleeding line (51), wherein one of said supply line (41) and said bleeding line (51) has a fixed flow rate, and the other has a variable flow rate controlled by a control (53).</p> |
