When you close the lid of the coffee bean storage tank, the one-way exhaust valve will automatically remove carbon dioxide through the pressure difference between the inside and outside. In this way, the coffee beans can be stored in a low-oxygen, low-carbon dioxide environment, thereby maintaining their ideal flavor. At the same time, this exhaust valve can also isolate the oxygen and water vapor outside the tank to prevent the coffee beans from oxidizing.
You may wonder why not just use an ordinary sealed tank? In fact, although ordinary sealed tanks can isolate oxygen and water vapor, they cannot remove carbon dioxide. The one way exhaust valve can maintain a low-oxygen environment in the tank while removing carbon dioxide, so that the flavor of the coffee beans can be maintained for a longer time.
