Separates the oil from the compressor discharge gas and returns the oil through the oil float trap and piping to the compressor crankcase.

a device for separating oil or oil vapor from refrigerant

In a chiller utilizing a screw compressor, an oil separator is often used to remove lubricating oil from the refrigerant vapor at the discharge of the compressor, in order to keep the oil from collecting in the heat exchangers.

A device used to separate oil from air, or oil from another liquid.