| 摘要 |
A valve includes: a valve casing ( 1 ); a valve chamber ( 4 ) defined between a fluid inlet ( 2 ) and a fluid outlet ( 3 ) of the valve casing ( 1 ): and a plurality of check valve mechanisms ( 9 ) arranged in series within the valve chamber ( 4 ), the plurality of check valve mechanisms ( 9 ) each including: a valve seat ( 6 ) having a valve hole ( 5 ) formed therein: and a valve body ( 8 ) fixed to a valve shaft ( 7 ) and arranged on a fluid outlet ( 3 ) side of the valve seat ( 6 ), the valve shaft ( 7 ) passing through the valve hole ( 5 ) of the valve seat ( 6 ) and movably supported on a fluid inlet ( 2 ) side and the fluid outlet ( 3 ) side of the valve seat ( 6 ), the valve body ( 8 ) being adapted to move away from the valve seat ( 6 ) to open the valve hole ( 5 ) when applied with a fluid pressure from the fluid inlet ( 2 ) side and adapted to move toward and into contact the valve seat ( 6 ) to close the valve hole ( 5 ) when applied with a fluid pressure from the fluid outlet ( 3 ) side. As a result, a valve with a check valve mechanism capable of reliably preventing fluid backflow can be obtained.
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