| 摘要 |
PROBLEM TO BE SOLVED: To provide a hollow jet valve capable of preventing intrusion of a foreign matter into a sliding part and capable of maintaining stable movements of a needle at any time. SOLUTION: The needle 3 for opening and closing one end opening of a valve casing 2 is housed in the valve casing 2 extractably along a flow passage axial direction. A tubular needle supporting member 4 fitted on the needle 3 and extractably supporting the needle 3 along the axial direction is fixed on the valve casing 2. A ring shaped wiper 31 sliding on an outer peripheral surface of the needle 3 is provided on an opening periphery part of the needle supporting member 4.
|
