| 摘要 |
A gas distribution installation consists of two pressurised gas sources connected by valves (26a, 26b). There is an automatic inverter mechanism comprising a housing (1) with an outlet and an inlet (101, 102) for each of the valves, connected by a central well and valve box (7a, 7b). Each valve box has a chamber which can be closed by a valve (6a, 6b) held against a seat by an elastic element (5a, 5b) and a pusher (9a, 9b) controlled by a cam and ball. Each of the valve boxes is cylindrical in shape, while the valves and pushers are square or polygonal. |
