| 摘要 |
<p>An inlet flow passage (12), a valve seat section (14), and a valve chamber (13a) are formed within a flow passage block (11). An operation chamber (13), a rocking chamber (22), and a drive chamber (23) are formed within a case (21) along a reference plane. A valve rod (31) is inserted in the operation chamber (13) and is brought into contact with and separated from the valve seat section (14) by being reciprocated in the direction of extension of the operation chamber (13). A piston rod (55) is inserted in the drive chamber (23) and is reciprocated in the direction of extension of the drive chamber (23). A lever member (60) is received in the rocking chamber (22) and has a support shaft section (68). The distance between the center (P3) of the support shaft section (68) and a second contact position (P2) where the piston rod (55) and the lever member (60) are in contact with each other is set to be greater than the distance between the center (P3) of the support shaft section (68) and a first contact position (P1) where the valve rod (31) and the lever member (60) are in contact with each other.</p> |
