To provide a structure for supporting a valve body in a control valve and a pressure control valve using this supporting structure which can exert stable flow characteristics over a long period of time, having less particles generated, a simple construction and an easier assembly, while restraining a sudden movement of the valve body by preventing vibration of the valve body by variations of the secondary pressure, mechanical shocks and the like.
The structure for supporting the valve body is composed of the valve body 5 in the pressure control valve 40 which controls the flow of fluids between a first port 20a and a second port 20b by shifting the valve body 5 in the open direction against an energizing force of a valve close spring 3 which energizes the valve body 5 in the close direction. A vibration preventing member 84 for preventing the vibration of the valve body 5 is provided in the end part of the opposite side against a valve hole 4a of the valve body 5 and at the same time, the vibration preventing member 84 is pinched between the valve body 5 and a support member 86 arranged adjustably in position against the valve body 5.
Koji Makimura
Chihata Takahata
Toru Suzuki
Next Patent: MANUFACTURING METHOD OF ROLLER