| 摘要 |
<p>1,121,492. Valves. ETABS J. PEROLO & CIE S.A. 14 Jan., 1966 [14 Jan., 1965], No. 1765/66. Heading F2V. A liquid-tight shut-off valve 3 controlling the outlet of a chamber 6 is coupled to a leaky drop shutter valve 1 controlling the inlet. The valve 3 is slidably mounted on, and provides a seat for, a pressure equalizing valve 8. On rotation of a common actuating shaft 2 the pressureequalizing valve is first opened against a spring 9, then the valve 3 opens, and finally the dropshutter valve is engaged by the valve 3 and opened against a torsion spring 11.</p> |
