| 摘要 |
A pilot valve unit for actuator control is provided to secure safety by maintaining the state of power failure as it is by accurately controlling air supply and discharge of an actuator. In a pilot valve unit for actuator control, a first air room(220) and a second air room(230) are constructed at one side, and a third air room(320) and a fourth air room(330) are constructed at the other sides, about a center of a unit body(210). A first air guide channel(250) having the first check valve(251) is formed between the first and the fourth air rooms. A second air guide channel(350) having a second check valve(351) is formed between the third and the second air rooms. Each of valves(271,271a,371,371a) is formed in the first to the fourth air rooms. First and second valve operation units are installed on the top of the valves to operate them. The bottom of the second air room is connected to the bottom of the actuator via an air line(261). A regulator(400) is installed on one side of the third air room to supply the air of predetermined pressure to the first and the second valve operating units. |
