| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic operation valve capable of easily adjusting specifications of a valve.SOLUTION: A pneumatic operation valve 1 includes inside a valve box 3: a spring member 21 imparting, to a shaft 4 connected with a valve body 2, axial force in the axial direction of the shaft; and a valve operation pressure chamber 22 imparting, to the shaft 4, force resisting the axial force, and operating the valve body 2. The pneumatic operation valve employs a structure that has an axial force adjustment device 31 adjusting energy accumulation of a spring member 21 through a surface pressure adjustment screw 32 inserted from the outside of the valve box 3 to the inside of the valve box 3. |
