Advantages of valves:

1. When the fermented product  release the gas, the one way valve can solved the heat dissipation, anaerobic control, as well as the packaging, storage and transportation, stability ingeniously, greatly reduce the production cost of the fermentation product. 

2.One way valve bring coffee bean (solid, large particles) very carefree breathing, avoid outside air into the bag, to prevent pollution by oxidation, effectively guarantee the quality of the coffee, you can smell the coffee fragrance from this valves when you buy the coffee, can better judge the quality of coffee.

3.The bag with a one way valve, when the packing bag handling or high drop, bag of gas can be taken out from this valve, reduce the impact of gas on packaging, avoid broken.