Pressure Stabilization: Vent packaging valves help to stabilize the internal pressure within packaging so that it does not swell or become depressed.
Humidity Control: They allow for transmission of surplus moisture away from foodstuffs, thereby halving that chance dehumidification will trigger putrefaction.
Protection of Products: Through controlling the flow of air, these valves keep out external pollutants and at the same time give protection to its own quality.
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