In major systems, the compressor is used to prevent the circulation of lubrication oil and to get the oil back to the compressor. Its usage increases system efficiency and expands the compressor’s life. The intended use of the oil separators is to separate oil discharge gas and to properly and regularly get the oil back to the compressor housing. Besides, it is used to prevent the coolant gas migration, to separate the coolant included in the oil and to provide the circulation of gas in the system by providing a high oil temperature.