
The Fundamentals of Vacuum Theory - Vacaero
10/8/2018· Since there is no true macroscopic flow in the molecular range, the pumps used at high and ultra-high vacuum cannot “pull” the gas out of the vacuum chaer. Rather their mode of operation is to simply capture the molecules that randomly enter the pump inlet. As a result, when the chaer pressure reaches the high and ultra-high vacuum ranges, the drawdown …