| 摘要 |
PURPOSE:To remove a trouble such as shaft displacement due to slide friction, or friction heat, etc. by retreatably or advancably supporting a shaft body formed by integrally fixing a valve body through a guide shaft within a valve accommodation part. CONSTITUTION:A valve accommodation part 21 includes guide bearings 22a, 22b provided along the axial direction with a predetermined distance. A shaft body 25 coaxially integrating a valve body 29 at the shaft end is guidably supported by two guide bearings 22a, 22b. Therefore, the valve body 29 can stably be moved back and forth along the axial direction and serves to block a fluid passing port 5 stably and certainly in cooperation with the strong pressing force by a compression coil spring 28. Meanwhile, the area of the sliding part of the shaft body 25 can be reduced, thereby the generated quantity of friction powder and occurrence of friction heat can be restricted to a low level. |
