A high-temperature afterfilter is recommended to remove desiccant particles.Ī coalescing or particulate prefilter is recommended to keep pipe scale and dust from entering the dryer. Failure to do so may result in hazardous operating conditions and will void warranty. Regenerative dryers must have clean, oil-free inlet air!ĭryer must be equipped with coalescing prefilters as shown in our filter brochure. Includes contacts for alarm or remote indicator. Light is activated when the outlet dew point is higher than the set point. Failure to switch is indicated when the inlet valve does not shift or when a tower does not repressurize. Pressure switches sense offstream tower pressure. A thermostat registers a rise in purge air outlet temperature, which indicates the bed is regenerated, so the heater is turned off. Reduces the heating cycle to match actual moisture loading conditions under low flow or low inlet moisture loading conditions, thus lowering operating costs. Includes indicator light for in-tower high dew point with dry contacts for remote indication. At this point, the moisture sensor signals the dryer controls to switch the process flow to the dry tower and regenerate the wet tower. Holds the drying tower on stream until the desiccant bed is fully saturated. * Energy saver or dew point demand switching is recommended to minimize temperature spikes at tower switchover.Tower mounted tower pressure and temperature gauges.Mechanical timer (heated) and solid state board (heatless) backup modes.Purge flow control valve w/pressure gauge for flow indication.Permanently lubricated inlet transfer valve w/position indicator and depressurization safety.Aluminum jacketed heater and heated zone tower insulation.The eight hour NEMA cycle includes four hours of drying, three hours of heating and one hour of cooling per tower. Wet air is exhausted through the purge valve. A small portion of the outlet air is redirected through the external heater and downward through the offstream tower to regenerate the desiccant. Dry air exits the outlet valve at the top of the dryer. Wet compressed air enters the inlet valve at the bottom of the unit and is dried as it flows upward through a bed of adsorbent desiccant. Prevents loss of production in the event of heater failure or maintenance.Ĭall Us for Larger or Engineered-to- Order Models for Your Application Operation Switch to this mode and keep the dryer on stream while the heater is being serviced. Protects against loss of flow or pressure because the offstream tower is always fully repressurized before air flow is redirected to it and a tower can only depressurize after the inlet transfer valve is fully seated. Each phase of the drying cycle must be completed before the next can begin. Patented valve control for the most reliable tower cycling. Distribution of heat throughout the desiccant bed optimizes dryer performance and prolongs desiccant life. Easy to service with the heating element outside of the vessels. Ideal for general manufacturing and process industry applications, HP Series externally heated regenerative compressed air dryers provide a low -40F/C pressure dew point for superior air line moisture protection, while offering the efficiency of convection-heated desiccant regeneration. RATED FLOWS BASED ON 100 PSIG, 100F INLET AND 100% RH. Contact ACS for larger or special models. Request certified drawing for pre-piping. Desiccant is installed on HP 150 through 500 and shipped separately on larger units.ĭue to our policy of continuous improvement, dimensions and specifications may change without notice. * For total desiccant weight, multiply by two. Dimensions (in.) Height x Width x Depth : 98x80x53.HP Series Heated Regenerative Dryers 150 through 5000 SCFM
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