| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid shutoff apparatus which further surely and safely shuts off a fluid even when a foreign matter or the like bites into a sealing part. SOLUTION: When a flow rate determination part 28 determines that there is a higher flow rate than a predetermined rate while a shutoff storage part 29 is performing shutoff, a drive control part 26 operates restoration of a predetermined stroke generally less than one third of a shutoff stroke, and then re-shuts off a shutoff valve 23, by shutoff driving a shutoff means again. The shutoff valve 23 is thereby more likely to shut off a gas passage 22, so that a gas is further surely and safely shut off. COPYRIGHT: (C)2009,JPO&INPIT
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