PURPOSE: A valve having a malfunction prevention function is provided to monitor malfunction in a site or in a remote region. CONSTITUTION: A handle opens and closes a valve. A bracket(10) surrounds the handle. A plug(5) includes a locking pin passing through a through hole. A spring(9) is formed in the plug. The spring pushes the plug to the handle. [Reference numerals] (AA) Close sign; (BB) Open sign; (CC) Release button
