| 摘要 |
<p>A finely adjustable firing valve comprising a first valve (10) providing a first inlet (20) and a first discharge (21) connected through a first actuation chamber (22), and having a first shutter (23), a second valve (11) having a second shutter (37), a third valve (12), having a third shutter (43), characterized in that it comprises a piston (24) bound to said first shutter (23) that slides within said first chamber (22), of such a size that the upper surface of said piston (24) affected by the pressure inside said first chamber (22) is substantially equal to the lower surface of said piston (24) affected by the pressure existing in said first inlet (20). ( Fig. 1 )</p> |
