| 摘要 |
The disclosure relates to an arrangement in a valve for high-pressure gas cylinders, primarily for oxygen gas cylinders, in order, during the opening phase, to prevent gas-rush through the valve, the valve comprising an inlet connection (1) intended to be screwed into the gas cylinder and including an inlet passage (3) for the gas. A tubular sleeve member (6) is disposed in the gas passage and is axially movable along a predetermined distance. When the valve is closed, the one end of the sleeve member (6) abuts against the movable sealing member (5) of the valve, and its other end abuts against spring means (10) disposed in the gas passage. The sleeve member (6) is of such diameter that a gap (16) is obtained between the sleeve and the gas passage wall, the sleeve (6), in the initial phase of the opening movement of the valve, abutting against the movable sealing member (5) along the above-mentioned distance, such that a slight volume of gas flows through the gap, and, on further opening movement, the movable sealing member departs from the sleeve (6) and full gas flow is obtained through the valve. |
