Dry Vacuum Pump

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

Principle of Operation

Dried out screw vacuum pumps operate with two screw rotors rotating in opposing directions. This traps the medium to be pumped between the cylinder and the screw chambers and transports it to the gas discharge. … It also results in a lower heat load of the compressed gas.