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coffee bag one way degassing valves for coffee bag

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Product Summary

One way degassing valves are designed to allow pressure to be released from an air-tight package while preventing air from getting back into the package. Air, especially the oxygen portion of air, can have negative effects on the package contents and its freshness.

The most common application of the one way degassing valve is for fresh roasted coffee. Fresh roasted coffees emit large amounts of gas (CO2) for several days after roasting. At the same time, coffee requires protection from air to maintain its fresh roasted taste. A coffee roaster must seal his coffee in a package that will (1) not allow air to enter the bag to spoil freshness, and (2) will allow the CO2 emitted from coffee to escape out of the bag.

The one way degassing valve was invented to meet this need (i.e. it allows release OUT, but not IN). Provided the one way valve functions properly, roasters can:
a) Package coffee immediately after roasting,
b) Allow “degassing” in the package,
c) Minimize oxidative degradation of fresh roasted coffee, and
d) Extend shelf stability

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