| 摘要 |
A first valve (12) is open in the normal position and is connected to both the ingoing connection (10) and the outgoing connection (11). A second valve (13) normally closed (n.c.) in the normal position is connected to the ingoing connection (10) and is arranged for control of the first valve. A third valve (15) is connected to the outgoing connection (11) and is activated at the fixed filling pressure, thereby opening the n.c. valve (13), and in turn closing the n.o. valve.The second valve (13) comprises a control unit for the first valve (12). The third valve (15) consists of an amplifier valve with given activation pressure. A check valve (17) is positioned between the first valve and the outgoing connection (11), permitting flow only in the direction of the connection. The outgoing connection (11) consists of a bayonet coupling. |
