| 摘要 |
1337571 Valves L'AIR LIQUIDE SOC ANON POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE 24 Nov 1970 [26 Nov 1969] 55921/70 Addition to 1105832 Heading F2V The main invention is improved by the addition of a restricted pressure equalizing passage 100 connecting opposite ends of the slide 2. This avoids premature operation, e.g. in the event of there being a slightly leaky pressure reducing valve upstream of the higher pressure inlet 4, and before the source connected to the other inlet 8 is sufficiently exhausted. The passage 100 terminates inwardly of the end seals 82, 84 so that a source can be disconnected. The passage may be in the slide 2 or in the sleeve parts 4, 8, and may have adjustable restrictors (106, 118, 120), Figs. 3 and 4 (not shown). |
