| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of a check valve capable of resolving the defective operation of a valve element without opening a lid of a valve casing. SOLUTION: This ball check valve 100 comprises the ball-shaped valve element 107 movably mounted in a flow channel from a primary side 101a of the valve casing 101 toward a secondary side 101b, and a valve seat 106 for seating the valve element 107 at the primary side of the flow channel. A valve element moving means 110 for forcibly moving the valve element 107 seated on the valve seat 106 to the secondary side is mounted in a state of being faced to the inside of the valve casing 101. Whereby the defective operation of the valve element 107 can be resolved without opening the valve lid 103. COPYRIGHT: (C)2005,JPO&NCIPI
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