These larger floor model double chamber vacuum machines are the work horses of the food packaging industry! They are simply a pair of chambers with two seal bars to seal the pouch. Double chambers increase production! You can unload and load the opposite chamber while the other is vacuuming. The swing lid machines can all be special ordered with Top & Bottom, Sealing (heat on both sides of the seal bar) to seal pouches like gussetted and foil lamenates. All our double chamber machines can be set up to gas flush (see below) which is inserting an inert gas back into the pouch after the air is taken out. Because the entire pouch is in a vacuum, chamber machines use standard "flat" commercial vacuum pouches. All our vacuum pouches with the exception of the embossed pouches will work with the chamber machines. Because the pouch doesn't get tight until after the pouch is sealed, chamber vacuum machines work great for vacuuming liquid and/or product that has a lot of liquid in it.