This is of a dry vacuum pump is a pump that does not use any fluids to create a vacuum or contact the process gas and may also discharge to atmosphere. … Timing gears with oil reservoirs and close clearances between your rotors and housing are extra attributes that define a dried out vacuum pump.

Principle of Operation

Dry screw vacuum pumps operate with two screw rotors rotating in opposing directions. This traps the moderate to become pumped between your cylinder and the screw chambers and transports it to the gas discharge. … In addition, it results in a lesser temperature load of the compressed gas.