| 摘要 |
PROBLEM TO BE SOLVED: To provide a pilot flow control valve device capable of being operated more lightly. SOLUTION: This pilot flow control valve device 10 comprises a main valve 16, a back pressure chamber 24, an introduction small hole 26, a pilot water passage 28, a pilot valve 30 changing the opening of the pilot water passage 28, and a drive shaft 46 driving the pilot valve 30. The flow of a main water passage is controlled by advancing and retreating the main valve 16 following the advancing and retreating motion of the pilot valve 30. The overall pilot valve 30 is installed in a water chamber 44 receiving the pressure of the back pressure chamber 24 in a dipped state. The drive shaft 46 is installed in the direction orthogonal to the advancing and retreating direction of the pilot valve 30 and sealed with O-rings 50-1, 50-2. A cam mechanism 53 advancing and retreating the pilot valve 30 by the rotation of the drive shaft 46 is installed on both a portion between these seals and the pilot valve 30. COPYRIGHT: (C)2007,JPO&INPIT
|
