This series is specially for chain store, supermarket, fast-food store, and small-sized foodstuff company. Only need to press start button, BKAS-450B will perform vacuum, gas-flushing, sealing, cooling, film-cutting, lid-opening automatically. Vacuum is performed from airtight chamber firstly, then mixed gas / inert gas will be flushed into chamber. The vacuum gas-flushing packed tray can prolong the products shelf life while keeping its freshness, taste and nutrient. Packaging capacity is about 180 times/h, and will be higher for skilled operator.