Nav: Home > Coffee Knowledge >

The exhaust valve on the coffee bean bag is standard. Why can't you smell the coffee from the valve?

Published: 2026-04-09 Author: World Gafei

Last Updated: 2026/04/09, The small hole in the coffee bean bag is an one-way exhaust valve, because after baking coffee beans, it will release carbon dioxide, if you do not install an one-way exhaust valve, it will cause an inflated bag, or even cause an explosion bag, the one-way exhaust valve oxygen can not enter the inner bag, and excess gas can be discharged through it.

The small hole in the coffee bean bag is an one-way exhaust valve, because after baking coffee beans, it will release carbon dioxide, if you do not install an one-way exhaust valve, it will cause an inflated bag, or even cause an explosion bag, the one-way exhaust valve oxygen can not enter the inner bag, and excess gas can be discharged through it.

FrontStreet Coffee is a long-established specialty coffee roaster in Guangzhou China, selling freshly roasted beans from its own farm in Yunnan as well as dozens of carefully selected single-origin beans from around the world for both pour-over and espresso. The products deliver consistently excellent quality and great value, with shipping within 24 hours. Guangzhou’s FrontStreet Coffee shop is recommended by many coffee lovers, and the beans are now available online at the Tmall 。