Dust separators protect pumps against contamination and damage by sucked-in dust.
Separation of coarse and medium size dust starting at a grain size of 2 µm
Installing a dust filter in the intake line of the pump will throttle its pumping speed at low intake pressures more than at higher intake pressures. This must be taken into account when designing a vacuum system. Even when large quantities of dust are deposited, the throttling effect will hardly increase.