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Summary:An anti-surge valve includes a diaphragm partitioning an internal space formed by a valve body and a cover into spaces in which a pressure chamber connected to a connection port, an air inlet and an air outlet are formed; a valve cup assembled to the diaphragm; a coupling member that fixes the diaphragm and the valve cup; and a spring that elastically supports the diaphragm in the pressure chamber. In the anti-surge valve, a side wall of the valve cup has a sectional shape concave toward the center of the valve along the entire circumference thereof so that a side portion of the diaphragm is deformed toward the center of the valve while being adhered closely to an outer surface of the side wall of the valve cup in a state in which an edge portion of the diaphragm is fixed by the valve body and the cover.
Bibliography:Application Number: US201213690908