The Filter-Regulator Combination is one of the most popular air preparation units. The 2 are assembled together to form a single unit Air Filter is used to separate dust, dirt, moisture & other contaminants from compressed air Filter has a Die Cast Aluminum body, polycarbonate bowl with a steel bowl guard & a high performance Sintered Bronze Filtering element Filter is designed with a Separator & shield for efficient moisture separation. It is combined with a Regulator which maintains a steady outlet pressure, unaffected by variations/fluctuations in the inlet pressure Regulators have a Non Raising "Press to Lock" adjusting knob for locking at any set pressure .Regulators work on a Diaphragm operated, relieving type mechanism with pressure compensated by balanced poppet. Max flow rate: 20 CFM / 550 LPM Threaded type steel bowl guard Operating Pressure: 145 PSI (10 BAR) Operating Temperature: Ambient 0-60°C (32-140°F)