| 摘要 |
PROBLEM TO BE SOLVED: To provide a granular substance supply amount adjustable stop valve capable of continuously changing a granular substance supply amount by adjusting the size of a sectional area of a passage formed between the opening of a valve seat and a valve element, continuously and highly accurately stabilizing the granular substance supply amount in the adjusted sectional area of the passage, and improving the accuracy of the reproducibility of the supply amount.SOLUTION: In a power supply amount adjustable stop valve 10, a valve seat 20 is disposed in a valve element 15 to separate an upper chamber 12 and a lower chamber 14, and includes an opening 21 vertically penetrating the valve body and making the upper chamber 12 and the lower chamber 14 communicate with each other. A valve stem 22 is disposed vertically movably with respect to the valve element 15 so as to vertically penetrate the opening 21 of the valve seat 20. A spherical valve element 23 is disposed below the valve seat 20 at the lower end of the valve stem 22, and the opening 21 of the valve seat 20 is opened/closed by the vertical movement of the valve stem 22. |
