Hurenji coupling structure of selection valve

摘要

The present invention relates to a flange coupling structure of a selection valve, and more specifically, to improve the flange coupling structure of a selection valve installed in a fire extinguishing pipeline, a fire extinguishing gas container that is differentially installed according to the area and size of a building, that is, a gas pressure. By selecting one selection valve to be connected according to the present invention, it is possible to use universally and interchangeably, thereby improving workability and preventing gas accidents caused by the rupture of the selection valve.