| 摘要 |
In a first position of the valve spindle (9) between the two end positions, a first seal (15) on the spindle forms a primary gap (32) between the first connection (2) and the third connection (5) which works in conjunction with it. A seconda seal (16) works in conjunction with a third valve seat (8'), and closes the flow path between the second and fourth connections. In a second position, the second seal forms a second space between the second connection (3) and the fourth connection (4), and in this position the first seal works in conjunction with the first valve seat (7), maintaining broken the connection between the first connection and the third. The seals involved are O-rings, fitted in ring tracks in the valve spindle, and the valve spindle fits into threads into the housing hole (6-8). |
