A gas extinguishing system selector valve

Abstract

This utility model relates to the technical field of gas fire extinguishing systems, specifically, to a selector valve for a gas fire extinguishing system. The selector valve includes a valve body and a movable tube. The movable tube has a piston ring on its outer side, and the valve body has a piston ring cavity adapted to the piston ring. One end of the movable tube is connected to the input end of the valve body. A sealing plate capable of sealing the other end of the movable tube is installed inside the valve body. A return spring for the movable tube is provided between the movable tube and the valve body. When the other end of the movable tube disengages from the sealing plate, it connects to the output end of the valve body. The valve body has a first control gas path connected to the input end and a sixth control gas path connected to the side of the piston ring cavity away from the input end. A gas path control structure connects the first and sixth control gas paths. By utilizing the pressure of the system gas itself to control the movement of the movable tube, less external power is required, and a separate nitrogen cylinder assembly is unnecessary.

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