| 摘要 |
<p>The path valve is hydraulically/pneumatically controlled and has four pressure compensated back pressure valves with one pair of valves for each valve movement direction. One valve of each pair has an adjustable flow on the tank conduit side. In both directions, the first valve (VT1, 2) of each pair opens a connection between a connection channel (A, B) and the tank conduit (T), due to a control pressure (OA3, OB3) which becomes active at one end of pressure reducing pistons. The second valve of each air opens a connection between a pressure conduit (P) and the connection channel, due to the control pressure. There is a back pressure valve (C1, C2) for both directions between tank conduit and connection channel, to allow a pressure medium flow in that direction, and prevent it in the other.</p> |
