| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a forcible opening valve that requires less assembly man-hours, and a pressure relief valve including the same. <P>SOLUTION: A valve casing 4 has a pair of opposing operation lever support arms 4d', 4d''. An operation lever 5f is rockable between a retreat position of being engaged with the operation lever support arms 4d', 4d'' so as to be incapable of being disengaged from the operation lever support arms 4d', 4d'' and an operation position of being clamped by the operation lever support arms 4d', 4d'' and a poppet valve stem 5d. When the operation lever 5f is in the retreat position, the poppet valve stem 5d receiving biasing force of a second spring 5e is separated from a valve body 5a and the valve body 5a receiving biasing force of a first spring 3 is brought into contact with a valve seat 2b'. When the operation lever 5f is in the operation position, the poppet valve stem 5d is engaged with the valve body 5a against the biasing force of the second spring 5e to press the valve body 5a and the valve body 5a is disengaged from the valve seat 2b' against the biasing force of the first spring 3. <P>COPYRIGHT: (C)2013,JPO&INPIT |
