EMERSON produces oil separators for over 30 years and is considered the world's leading manufacturer in its field quality. Compressor cooling systems must have lubrication to function regularly. During the compression process some oil (mixed with refrigerant) seeps out of the compressor, the role of the oil separator is to separate the oil from the refrigerant and return the oil into the oil pan of the compressor. Oil separators are available in solder connections 3 \ 8 "to 3-1 \ 8" with and without phalanges