| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent powder and granules from being damaged by a valve element of a butterfly valve arranged in a flow path of the powder and granules.SOLUTION: A butterfly valve device comprises: a guide member that includes a lower end opening part 3i and guides powder and granules to discharge them from the lower end opening 3i; and a first split butterfly valve V that includes a valve element V2 rotatable around an axis line L of shaft parts 3h and 2t and can open and close the lower end opening part 3i of the guide member by rotating the valve element V2.</p> |
