The definition of a dried out Dry Vacuum Pump vacuum pump is a pump that will not use any fluids to create a vacuum or contact the process gas and will also discharge to atmosphere. … Timing gears with oil reservoirs and close clearances between the rotors and casing are additional attributes that make up a dried out vacuum pump.

Principle of Operation

Dry screw vacuum pumps operate with two screw rotors rotating in reverse directions. This traps the medium to become pumped between your cylinder and the screw chambers and transports it to the gas discharge. … It also results in a lesser temperature load of the compressed gas.