Polar One Chamber Vacuum packing How can vacuuming operate? Vacuum means ‘with no air’. A vacuum chamber machine eliminates ninety nine.8% with the air through the chamber and package deal. It then seals the packaging airtight. Increase oil towards the pump till it reaches midway up the sight glass. https://www.linpack.com/news/streamline-your-liquid-packaging-process-with-advanced-technology