| 摘要 |
The control valve consists of a cylinder (7) with a slidable and rotatable piston (25). The supply and return pipes (2,6) on the primary side are connected to the cylinder at spaced positions in the axial direction. The supply and return pipes (3,5) of the secondary circuit are similarly connected, but at different peripheral positions from the primary connections. One secondary side pipe (5) has an additional connection (19) to the cylinder which enables the pipe to be connected to the other secondary pipe (3), when the piston is in the closed postion. In the open position, the supply and return pipes of both primary and secondary sides are connected to each other. |
