| 摘要 |
<p>A constant air flow rate valve (1) with a changing cross section, preferably conical, passage section (14) and within said passage section (14) a throttling member (3) changing shape and which in dependence of the differential pressure across the passage section (14) moves towards the flow walls (14a) of the passage section (14). As taught by the invention, the throttling member (2) with throttling part (3) has been disposed to be displaceable in the direction of the central axis (X1) of the passage section (14) for imposing the set-point value of flow rate. The invention also concerns a procedure for controlling a constant air flow rate valve.</p> |
