| 摘要 |
1,008,400. Valves. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. July 26, 1962 [July 28, 1961], No. 28790/62. Heading F2V. [Also in Division B1] A valve for an opening 2 in a gas 1 liquid contact tray comprises a plate 3 (Fig. 1), having downwardly-extending guide elements 9 and 10 made of resilient strip material and provided at their ends with a bent-over portion 12 or a tongue 11 which when the valve is lifted, limit its upward movement by contact with the underside of the tray. The guide elements may be formed as a single strip passing over. the top of the plate 3 and secured thereto in recesses formed in the periphery of the plate. In a modification, two strips crossing each other or lying parallel on the top of the plate 3 may be employed. As shown in Fig. 8, three guide elements are provided. In other modifications, strips forming the guide elements are secured to the undersurface of the plate 3.
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