Rotary vane vacuum pumps are the main option for vacuum packaging. Dry screw vacuum pumps, vacuum boosters, liquid ring vacuum pumps, claw vacuum pumps and rotary lobe blowers even have unique roles in packaging. Each of them delivers its individual unique gain dependant upon the particular application. "Functions With" https://www.linpack.com/news/choosing-the-right-tray-sealing-machine-for-your-business