Polar Single Chamber Vacuum packing How can vacuuming operate? Vacuum usually means ‘devoid of air’. A vacuum chamber machine removes 99.8% on the air in the chamber and bundle. It then seals the packaging airtight. Include oil for the pump till it reaches midway up the sight glass. It https://www.linpack.com/news/how-vacuum-packaging-machines-are-transforming-food-preservation