| 摘要 |
<p>The present invention relates to an automatic normally-closing (NC) diaphragm valve, wherein a great load is always applied to a valve sheet as pressure of pressing a valve body is high. An objective of the present invention is to provide an automatic diaphragm valve for high pressure capable of being stored while maintaining a performance of a valve until usage, and being stored for a long time. In a diaphragm valve pressing a diaphragm with a piston tool inside an actuator installed inside a body and closing a valve, a fixed-side locking portion is formed on a casing of the actuator; an operation-side locking portion is formed on a proper position of the piston tool; the locking positions of the fixed-side locking portion and the operation-side locking portion correspond to each other when the piston tool is moved toward an upward release-side; and the fixed-side locking portion and the operation-side locking portion are locked to each other by a maintaining member inserted from the outside of the casing.</p> |
