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DEGASSING VALVE

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Degassing Valve

In flexible packaging, a degassing valve is a small, one-way valve that allows gases to escape from the package without letting air back in. This helps to preserve the freshness and quality of the packaged product.

Degassing Valve

The degassing valve is typically made of plastic and is applied to the package during the manufacturing process. It is commonly used in packaging for coffee, tea, dried fruits, nuts, and other products that release gases as they age. The valve allows the gases to escape, slowing down the oxidation process and extending the shelf life of the product.

How Does It Works?
The valve consist of a valve body and a membrane. Even a very slight over-pressure in the package cause the membrane to bulge. As the over-pressure is increasing, the membrane rises at the one valve location until a channel is formed through which the gases can escape to the outside. After the gas has been successfully vented and the pressure is compensated, the valve closes and the membrane lies once again against the valve body. The content is reliably protected against external oxidation.
Valve Body Membrane
The degassing valve is typically made of plastic and is applied to the package during the manufacturing process. The valve was initially designed for coffee industry because freshly roasted coffee beans naturally produces large amount of gas, composed primarily of Carbon Dioxide (CO2). They are vulnerable to attack by oxygen ingress into the package. One way degassing valve will prevent over pressurization of the package.

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