Valve type bags are filled with a tube inserted in a small opening (valve) on the top corner of the bag. After filling, this valve then is closed, sealing the bag. One advantage of using a valve type bag is that they do not require a bag sewing machine or bag sealer to close the bag. There are three styles... Read more

There are two types of bags: open mouth and valve type. Open mouth bags are open across the top and require some method to close the top. Valve-type bags have a corner opening that is used for filling. Open Mouth Bags:  Depending on the bag’s material, open mouth bags are either sewen closed or heat sealed. Open mouth bags made... Read more