| 摘要 |
A hydraulic actuation system for moving motorized gates and similar is made up of a double-acting piston (2) connected to an actuation stem (6), a supply circuit (7), a reservoir (9) and a distributor comprising a controlled opening duct (17), which allows a flow rate which is sufficient to compensate for the difference in volume of the two opposing expansion chambers (4, 5) to runoff during the gate opening manoeuvre. |
