| 摘要 |
<p>1,248,370. Valves. WESTINGHOUSE ELECTRIC CORP. 23 Feb., 1970 [27 March, 1969], No. 8520/70. Heading F2V. High-pressure steam flow to a turbine is controlled by a valve plug 22 axially slidable in a tubular foraminous strainer 35 having an end portion provided with small steam throttling passages 46 and another annular portion in spaced relation to the plug having apertures 42 of sufficient size to strain the steam flow with minimum pressure drop. The valve is operated by a lever 51 which may be connected to an hydraulic servomotor and the throttling passages are not all uncovered until (P 1 - P 0 /P 1 ) < 0À5, where P 1 and P 0 are inlet and outlet pressures.</p> |
