HEATED REGENERATIVE DESICCANT DRYERS | BPD SERIES | EHD SERIES
Principle of Desiccant Operation Next Air & Gas offers two types of heated regenerative desiccant dryers: Blower Purge (BPD) models and External Heater (EHD) models. In Blower Purge models, an automatic system using a centrifugal blower and a high-efficiency heater pulls in ambient air and passes it through the heater. This eliminates the need to use valuable compressed dry air for desiccant regeneration. Instead, more compressed air goes to plant operations. The hot air stream from the blower flows opposite to the drying flow direction. Hot air above 400° F regenerates the moisture-laden desiccant bed and strips it completely of moisture. Our advanced control system monitors the dewpoint and adjusts the heating/regeneration accordingly, thereby providing significant energy savings. The heater circuit is completely insulated, ensuring maximum heating efficiency. In External Heater models, purge air is heated then passed over the bed to regenerate it. These are custom designed products, and we provide design and engineering assistance as needed to manufacture these unique systems. Should you need guidance determining which type of dryer works best for your operation, our experts are happy to analyze and make recommendations.
Standard Features • State-of-the-art PLC controller with color touch screen HMI • High-quality, direct drive, oil- free regenerative blower (BPD Series only)
• UL/CUL certified electrical panels • Visual alarm status • Full charge of desiccant (2000 cfm & up shipped separately) • ASME and CRN certified safety relief valve for each pressure vessel • Highest quality domestically manufactured desiccant • Dryer hour meter • Dryer service hour meter with alarm and re-set • Dryer common alarm with history • Dryer backup heatless mode in case of emergency • Dryer heater backup safety contactor with MSP switch • Failure-to-switch alarm in case of valve or pressure failure • 460 volts, 3 phase 60 Hz control power • Fully field-adjustable heater temperature setpoints • Tank insulation with safety jacket • Visual moisture indicator • Stainless steel control air tubing • NEMA-4X (stainless steel) electrical enclosure • Low ambient package • Control Power 400-380/3/50 575/3/60
• Low watt/density heater • High-performance, non- lubricated pneumatic
butterfly valve (800 cfm & up) • High-quality, non-lubricated pneumatic piston valve (200–600 cfm) • State-of-the-art, flow activated, high-temperature check valve (800 cfm & up) • Fail-safe design in case of power failure • Stainless steel inlet/outlet diffuser • Desiccant towers designed and constructed in accordance with ASME and CRN code • Pressure vessels feature 200 psig (up to 1500 cfm) and 150 psig (2000 cfm & up) • NEMA 12 Enclosure Optional Features • Filtration Package • Mounted Pre & After Filter • Mounted Pre & After Filter with 3-valve Bypass • Mounted Dual Pre & After Filters with 9-valve Bypass • Energy save demand cycle control with digital dew point display and adjustable set point
Consult the factory for additional options
Unit shown with optional tank insulation with safety jacket.
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