The degassing valve has actually gained its popularity from the ground of the coffee packaging.  Mainly, it is used in the keeping the coffee fresh and safe inside the packet.  The degassing valve actually works in one direction, it allows the unwanted gas inside the packet to move out and keep the coffee safe and fresh.  But, what will be the unwanted gas inside the packet?  The coffee packaging is actually a long and complicated process comprising on many steps.  One of the starting steps i...