FIELD: food industry.
SUBSTANCE: invention relates to device and method of operation of valves for drinking containers. According to proposed method, diaphragm is used to control liquid flow from container. Said diaphragm is movably coupled with valve to from negative pressure control valve or sucking liquid out of drinking container. Force appearing owing to pressure differential on diaphragm opens valve even at positive pressure inside drinking container caused by carbonated refreshing drink.
EFFECT: prevention of spilling of liquid when it is sucked out container.
31 cl, 6 dwg
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