Commercial Chamber Type Vacuum Sealers
These are much bigger and bulkier, and are ideally suited for mass production applications i.e. more than 500 bags a batch. The controls are pretty much the same as seen in compact variants. In order to control parameters like vacuum cycle, seal time, gas time, dwell time etc, newer models feature digital controls whereas the slightly older ones have knobs for the same.
The vacuum pumps used here are way powerful and capable of removing up to 99.98% of oxygen from the bag. The more expensive versions come fitted with Venturi vacuum pumps, which have no moving parts and therefore less susceptible to general wear and tear.
Typically, the choice here boils down to how much packaging you need done in a given period of time. In that respect, a single chamber, commercial vacuum packer can pump out 160 bags (10″x10″) in an hour. For even higher productivity figures, you can either choose between a dual chamber machine with a sliding top, or a single chamber featuring two seal bars on either side.
External Vacuum Sealers With A Retractable Nozzle
Just like any basic clamp type design, these machines also employ a similar mechanism need to hold the open end of the bag or pouch in position before the air extraction process can start. The difference, however, is the small tube that peeks into the bag to remove all the air and moisture and retracts back into its original position before the sealing process starts.
The advantage with these types of external sealers is that they can work with any kind of bag or pouch, which in turn reduces the overall expenditure incurred when purchasing lined or textured pouches. On the flip side, retractable nozzles can easily suck in liquid into the appliance, and should therefore be limited to packing solid foods.