COMPRESSED AIR CONTAINS NATURALLY OCCURRING MOISTURE, WHICH CAN NEGATIVELY AFFECT COMPRESSED AIR APPLICATIONS THAT REQUIRE MOISTURE FREE AIR. DRYERS ARE A COMMON SOLUTION FOR REMOVING SUCH MOISTURE. ONE OF THE MOST POPULAR OPTIONS ARE REFRIGERATED AIR DRYERS, DUE TO ITS ABILITY TO REACH AN ACCEPTABLE DEW POINT IN. NON-CYCLING REFRIGERATED DRYERS, THE REFRIGERANT ACTUALLY CIRCULATES CONTINUOUSLY THROUGHOUT THE SYSTEM. BECAUSE BOTH THE FLOW OF COMPRESSED AIR AND AMBIENT TEMPERATURES VARY, A HOT GAS BYPASS VALVE IS USED TO REGULATE THE TEMPERATURE OF THE REFRIGERANT WHILE PREVENTING FREEZING WITHIN THE SYSTEM. IT IS VITAL THAT LIQUID WATER AND OIL ARE REMOVED FROM YOUR COMPRESSED AIR LINES BEFORE ENTERING ANY REFRIGERATED AIR DRYER. LIQUID WATER AND/OR OIL FROM YOUR COMPRESSOR CAN DAMAGE THE INTERIOR COMPONENTS OF THE DRYER RESULTING IN DRYER NON-PERFORMANCE OR FAILURE. WHEN YOU SELECT THE " WITH PRE-FILTER OPTION" WE PROVIDE YOU WITH A STAGE 1 WATER SEPARATOR WITH AUTOMATIC FLOAT DRAIN IN ADDITION TO A STAGE 2 COALESCING FILTER / OIL REMOVING FILTER. PLEASE SEE OUR ATTACHED PICS. THE STAGE 1 WATER SEPARATOR HAS A 5 MICRON ELEMENT THAT WILL REMOVE 95% OF THE MOISTURE WATER FROM YOUR COMPRESSED AIR LINES. THE UNIT COMES WITH A 5oz METAL BOWL WITH VISIBLE SIGHT GLASS. THE STAGE 1 PRESSURE REGULATOR / WATER SEPARATOR COMES EQUIPPED WITH INTERNAL FLOAT DRAIN THAT AUTOMATICALLY RELEASES MOISTURE WATER FROM THE BOWL. REGULATOR ADJUSTS 7 - 175 PSI. THE STAGE 2 COALESCING FILTER, ALSO KNOWN AS AN OIL REMOVING FILTER, REMOVES THE REST OF THE MOISTURE VAPOR THAT MADE ITS WAY THROUGH THE STAGE 1 WATER SEPARATOR, IN ADDITION TO ANY RESIDUAL OIL FROM YOUR COMPRESSED AIR LINES. THIS STAGE 2 UNIT ALSO COMES WITH 5oz METAL BOWL AND INTERNAL FLOAT DRAIN, HOWEVER ITS VERY UNLIKELY THAT ANY MOISTURE BUILD UP WILL OCCUR IN THIS STAGE 2 BOWL. ADS DRYER INFO: 1-PHASE 115V, 14 AWG WIRE REQUIRED, DEW POINT: 41 DEGREES FAHRENHEIT AT 100 PSI, REFRIGERANT FLUID TYPE: R134a, DRYER IS 70 LBS