4OFAS HL provides 5 stages of contamination reduction for 8 contaminants (if liquid water or oil is present, the CDAS HL must be protected by anoptional OIL-X WS grade Water Separator)2.2 EST - Energy Saving TechnologyHeatless adsorption dryers consume energy through the use of process air called purge air which is used to regenerate the off-line desiccant bed.In order to provide a consistent outlet dewpoint, any compressed air dryer must be sized to reduce the highest amount of water vapour the dryerwill see (full flow demand in summer conditions). Adsorption dryers typically operate on fixed timing cycles based upon these worst caseconditions, however in periods of low demand and or in winter, when the moisture loading is reduced, the fixed cycle will consume more energythan is required. In order to significantly reduce this energy loss, each CDAS HL/ OFAS HL dryer is fitted with energy saving technologies asstandard.Each CDAS HL / OFAS HL includes an electronic control system with colour display, providing a visual indication of the unit's performance.Linked to this control system is the a dewpoint sensor which constantly monitors the outlet dewpoint and adjusts the regenerating cycle to exactlymatch the water vapour loading of the dryer. From the minute the system is operated, it is automatically adapting to ambient and duty conditions,saving air, energy and money.Stage 1 - General PurposeCoalescing FilterFor the reduction of waterand air aerosols down to0.5mg/m 3 (0.5ppm(w) andparticulate down to 1micron.Provides protection of theHigh Efficiency CoalescingFilter and Dryer.Stage 2 - High EfficiencyCoalescing FilterFor the reduction of waterand air aerosols down to0.01mg/m 3 (0.01ppm(w)and particulate down to0.01 micron.Provides protection for theDryer.Stage 3 - Adsorption DryerFor the reduction of watervapour.Standard PDP of -40 o COption for -70 o C PDP or-20 o C PDPStage 5 - General PurposeDry Particulate FilterFor the reduction ofparticulate down to 1micronStage 4 - Oil VapourRemoval FilterFor the reduction of oilvapour down to0.003mg/m 3Stages of Purification: 5Contaminants Reduced: 8 (10 with optional Water Separator*)* Optional Water Separator only needed if liquid oil or water ispresent at the inlet to purification system (Not a requirementfor all compressed air systems).Drying Depressurisation Regeneration Repressurisation Energy Saving (EMS)Time (Seconds)EMS Drying and Regeneration CycleSide ASide BOFAS Operation