Atlas Copco Compressor Sales manufactures Fully Automatic Oil/Water Separators. Atlas Copco Compressor Sales is an ISO 9001 and 14001 certified company. The Fully Automatic Oil/Water Separators cleanses the condensate to a quality far superior to any legal requirement. The GA 11 to 90 kW oil-injected screw compressors can be equipped with an integrated OSD which delivers a residual oil content of less than 10 mg per litre of condensate.