The definition of a dried out vacuum pump is a pump that will not use any fluids to make a vacuum or contact the procedure gas and may also discharge to atmosphere. … Timing gears with essential oil reservoirs and close clearances between the rotors and casing are extra attributes that define a dry vacuum pump.

Principle of Operation

Dry screw vacuum pumps operate with two screw rotors rotating in reverse directions. This traps the moderate 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.