An industrial vacuum pump is used for creating, improving and maintaining vacuum in a vast array of industrial manufacturing processes like degassing packaging, bottling, drying to name but a few. Vacuum pumps remove air molecules (and other gases) from the vacuum chamber. As the pressure in the chamber is reduced, removing additional molecules becomes increasingly harder to remove. Therefore, an industrial vacuum system must be able to operate over a portion of an extraordinarily large pressure range. To accomplish this, different types of pumps are used in a standard vacuum system, each covering a proportion of the pressure range, and operating in series at times.