Micro-fog lubricators, identified by a red adjusting screw, are used for applications containing one or more points of lubrication, cylinders and multiple or single tools. Air flow through the lubricator lifts oil from the reservoir to the sight-feed dome. Oil is dropped into the fog generator and atomized into a fine mist. Lightweight particles are delivered downstream for lubrication. Heavier particles fall back into the reservoir. The micro-fog lubricator delivers 10 percent of the oil drops visible through the transparent sight-feed dome. Micro-fog lubricators cannot be filled under pressure. On hose assemblies, pressure rating is the lower of either the rating of the coupling or the hose at 70 degree F. Recommended lubricants: misting type oil rated 50 to 200 SSU (ISO Grade 7 to 46) at 100 degree F. Maximum operating conditions - metal bowl: 250 PSI and 175 degree F. 142 SCFM.