The purpose of this device is to get the carbon dioxide out of the bean bag, because freshly roasted coffee beans have to be vented, and more aptly, it feels like breathing.
The function of the air valve is to help the carbon dioxide of the coffee beans to be discharged. Therefore, for the coffee beans, the air valve is a device that allows only the air to go out, which effectively slows down the aging speed of the coffee beans.
Fresh coffee beans release carbon dioxide
In the process of roasting coffee beans, part of the carbon dioxide of the coffee beans is released, but most of the carbon dioxide remains in the coffee beans, so the coffee beans will slowly exhaust the internal gas for about two weeks after roasting.
At this time, if the bag containing the coffee beans does not have an air valve to assist in the exhaust, the coffee beans in the bean bag will continue to be exhausted, and the bean bag will be over-inflated. If the storage environment is squeezing, the bean bag may burst open, destroying the preservation of the coffee beans.
Air damage to coffee quality
As mentioned at the beginning, the air valve of the coffee bean bag is a device that only goes out and does not enter, that is, a one-way air valve. The function of the air valve not only discharges the gas of the coffee beans, but also prevents the outside air from infiltrating into the bean bag, which affects the quality of the coffee beans.
There are three factors that affect the quality of coffee beans: oxygen, humidity, and temperature. These will shorten the best tasting period of coffee beans and destroy the quality of coffee beans. Therefore, it is very important to discharge the internal gas without letting air in.
Squeeze the bean bag to smell
When the carbon dioxide is discharged, the aroma of coffee beans will also be released in large quantities, which is why we can smell a very good aroma from the air valve when we squeeze the coffee bean bag, but this smelling action is not the original intention of the design of the air valve of the bean bag , because these carbon dioxide is actually one of the factors that keep the coffee beans fresh, the air pressure in the bag can also help the beans, and the squeezing action will also lose the aroma of the coffee beans and affect the quality of the coffee beans, so try to avoid squeezing The coffee bean bag smells.
Summarize the function of the air valve
1. Moisture-proof: effectively maintain the dryness and mellow flavor of coffee beans, and the moisture in the air cannot escape into the bag.
2. Buffering: When the coffee bean bag is impacted during handling or dropped from a height, the air in the bag can be discharged from the one-way exhaust valve, reducing the impact caused by the residual gas in the bag and preventing the package from bursting.
3. Exhaust: After the coffee is roasted, the carbon dioxide in the bag can be effectively discharged to avoid the package bursting.