| 摘要 |
<p>The present invention relates to a control valve designed to control the flow of a pressurised gas based on a comparison between the actual pressure of gas reaching the valve and a reference pressure. Within a housing (1), the control valve comprises a valve body (25) with a calibrated orifice (27). A tight bellows (38), containing a control gas and having an elastic stiffness that determine the reference pressure and maintain the valve body (25) on a valve seat (15) as long as the actual pressure of the pressurised gas (GPG) is less than the reference pressure in order to force the pressurised gas (GPG) to flow through the calibrated orifice (27), and permits the valve body (25) to move away from the tight seat (15) when the actual pressure is at least equal to the reference pressure to release the flow of pressurised gas (GPG). Application in particular to the control of a liquefied petroleum gas vaporizer.</p> |
