WATER SEPARATOR AND SYSTEM

A water separator and system includes a compressed air aftercooler and water/moisture separator with a demister core comprising a plurality of offset fins. In one embodiment, the compressed air aftercooler comprises a compressed air core having an aftercooler inlet, an aftercooler outlet at the bottom of the compressed air core, and one or more heat transfer passages. In one aspect, the system comprises a moisture separator substantially integral to the aftercooler. In another aspect, the system includes a first generally horizontal region beneath and adjacent to the aftercooler outlet; and an expansion zone adjacent to and in fluid communication with the first region, the expansion zone being configured to reduce the horizontal velocity of compressed air passing therethrough. In another aspect, the demister core is in fluid communication with the expansion zone. In certain aspects, the demister core comprises a plurality of offset fins creating an undulating/uneven flow and/or creating air flow direction change. Another aspect includes an exit zone downstream from the demister core, wherein the exit zone has a compressed air outlet and a condensate drain.