BUTTERFLY VALVE EQUIPPED WITH A PRESSURE REDUCING VALVE FOR FIRE FIGHTING

摘要

PURPOSE: A decompression valve for firefighting which includes a butterfly valve is provided to facilitate setting of repair and voltage transformation by respectively installing a butterfly valve in a primary side fluid path and a secondary side fluid path. CONSTITUTION: A decompression valve for firefighting which includes a butterfly valve comprises a primary side fluid path and a secondary side fluid path; a main valve(112) which controls an opening between the primary side fluid path and the secondary side fluid path; a pilot valve(114) which drives the main valve; butterfly valves(150) which are respectively placed in the primary side fluid path and the secondary side fluid path. Each butterfly valve comprises a lever which is supported by a rotary shaft in order to be exposed to the outside; a disk which opens and closes a fluid path according to the rotation of the lever by being fixed to the rotary shaft of the lever; a rotation stopper of the lever; and a tamper switch which senses the rotation position of the lever.