A filter system to absorb and separate water and oil vapors from gases comprising a cylindrical container connectable in a supply line for said gases and containing at least one filter unit comprising a seamless cylindrical sleeve formed from textile material having a predetermined uniform porosity, the diameter of said sleeve being slightly greater than the inner diameter of said container so that when the filter unit is supported between porous supporting means within said sleeve the periphery of the sleeve will smoothly and tightly engage the inner surface of the container and thereby prevent channeling and bypassing of gases between the sleeve and the inner surface of the container during use.

A filter system to absorb and separate water and oil vapors from gases comprising a cylindrical container connectable in a supply line for said gases and containing at least one filter unit comprising a seamless cylindrical sleeve formed from textile material having a predetermined uniform porosity, the diameter of said sleeve being slightly greater than the inner diameter of said container so that when the filter unit is supported between porous supporting means within said sleeve the periphery of the sleeve will smoothly and tightly engage the inner surface of the container and thereby prevent channeling and bypassing of gases between the sleeve and the inner surface of the container during use.