Why do my bags "puff up" in the USV20?Updated 2 years ago

Bags will "puff up" or inflate in the USV20 because the atmospheric pressure is less in the chamber outside of the bag, then it is within the bag. Some bag inflation is typical in chamber vacuum sealers. If your bag is inflating too much or more than normal, the bag could be pinched off, so ensure it is properly placed.