| 摘要 |
PURPOSE: A check valve controlling the amount of discharge gas is provided to control the amount of the discharge gas by being mounted on a sealed bag regardless of the capacity, properties, amount of contents which are packed on the inner part of the sealed pack. CONSTITUTION: A check valve controlling the amount of discharge gas comprises: a case(100) which surrounds a plurality of openings and includes a first sealing protrusion; an elastic packing(200) which is placed on the first sealing protrusion and blocks external gas and foreign materials; a valve cover(300) which is fitted into the case and is equipped with a gas exhaust port; and a control cover which is fixed to the case and includes an opening.
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