| 摘要 |
A pressure control valve is provided to open an inlet of the valve by moving a valve body with reaction force from a diaphragm to a supporting member, and to open and close the valve body corresponding to pressure of fluid by adjusting distance between a longitudinal wall and the diaphragm and repulsive force of the diaphragm. A pressure control valve(10) is composed of a shaft hole(10) penetrating a wall surrounding a pressure detecting chamber and having a valve inlet, a connecting shaft(32) inserted to the shaft hole and composed of a valve body in an end protruded from the valve inlet, a valve body closing and pressing unit pressing the valve body and closing the valve inlet, a branch hole(17) branched from the shaft hole and communicated with the valve inlet, a sealing member(80) sealing the gap between the inside of the branch hole and the connecting shaft, a decompression cylinder(42) fixed to the connecting shaft in the pressure detecting chamber and composed of an opening end opposed to the valve body, a diaphragm(44) extended to the opening end of the decompression cylinder, a longitudinal wall opposed to the diaphragm, and a supporting member arranged between the diaphragm and the longitudinal wall to open the valve body by repulsive force from the diaphragm in decreasing pressure of fluid.
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