Centrifugal Vacuum Pump

At this point also in centrifugal due to high rpm since it is Centrifugal Vacuum Pump directly coupled to engine the pump creates partial vacuum this means the liquid will flow through vacuum hence the liquid will be recieved at the centrifugal pumps suction and as the impeller rotates the fluid will be displaced away forward with a specific energy.

A vacuum pump has the inlet hooked up to 1 or both valve covers, sometimes the valley pan. It SUCKS the atmosphere from the engine, hence reducing the surroundings pressure build up created by blow due to combustion gases going at night piston rings in to the pan.