Clean Resources - NEXT Air & Gas - BPD Series blower purge desiccant dryers / EHD Series external heater desiccant dryers - product sheet
BPD & EHD HEATED REGENERATIVE DESICCANT DRYERS
Heated Dryer Performance Advantage In today’s demanding industrial environment, where moisture can wreak havoc on equipment and processes, it is crucial to invest in cutting-edge technology that safeguards your operations. That’s where Next Air & Gas Heated Regenerative Desiccant Dryers come in.
Designed with globality in mind and built to excel, our regenerative dryers are the ultimate solution for moisture control in compressed air systems. Whether you operate in manufacturing, food processing, pharmaceuticals, or any other industry relying on compressed air, our dryers provide a vital shield against the damaging effects of moisture. Our dryer series uses fully pneumatic stainless steel actuator valves rather than dated shuttle valves. This allows for independence of flow and pressure. With some dryers being only region-specific, we made sure that all dryers produced by Next Air & Gas are certified with ASME, CRN, UL, and CUL certification. With industry standards of design pressure being up to 150 psig, we thought it best to invest in the technical advantages and manufacture our pressure vessels to run at 200 psig (80–1,600 CFM) as standard.
Investing in our compressed air desiccant air dryers means investing in reliability,
productivity, and peace of mind. With our expertise and commitment to excellence, we provide you with the tools to achieve superior air quality and protect your valuable equipment and processes.
Why Dry Air?
To be used in industrial processes, compressed air must be clean and dry. Atmospheric air contains many contaminants such as dust particles, water vapor, oil, and other impurities. As air is compressed, these contaminants become more concentrated, causing a variety of problems, including equipment wear, increased maintenance, lower production
In some industries, even the smallest contaminants in compressed air can cause production problems or errors that cost thousands of dollars to correct. So dry air is absolutely critical in a modern factory. Next Air & Gas is dedicated to creating the systems needed to dry air so that your production is maximized and your costs are dramatically reduced.
efficiency, pipe and line corrosion, and other expensive headaches.
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.
HEATED REGENERATIVE DESICCANT DRYERS BPD SERIES | EHD SERIES
Product Specifications
Inlet Flow Capacity (CFM @100 psig)
Dimensions (in) (W x D x H)
Technical Overview
Model
Port Size
Weight (lbs)
BPD Series Specifications
–40° F
Standard outlet pressure dewpoint:
BPD-500 BPD-650 BPD-800 BPD-1000 BPD-1250 BPD-1500 BPD-2000 BPD-2500 BPD-3000 BPD-3500 BPD-4000 BPD-5000 BPD-6000 BPD-7000 BPD-8000 BPD-9000 BPD-10000 EHD-200 EHD-250 EHD-300 EHD-400 EHD-500 EHD-600 EHD-800 EHD-900 EHD-1000 EHD-1250 EHD-1500 EHD-2000 EHD-2500 EHD-3000 EHD-3500
500 650 800
2” NPT 2” NPT 3” FLG 3” FLG 3” FLG 3” FLG 4” FLG 4” FLG 6” FLG 6” FLG 6” FLG 6” FLG 6” FLG 8” FLG 8” FLG 10” FLG 10” FLG
2,500 2,750 4,100 4,500 8,200 8,200 9,800
71x45x92 71x45x92 93x60x95 93x60x95 93x60x97 93x60x97
460V/3PH/60Hz
Operating voltage: Pre-filtration grade: Post-filtration grade: NEMA 12 Enclosure:
0.01µm
1µm (high temperature)
Standard
1,000 1,250 1,500 2,000 2,500 3,000 3,500 4,000 5,000 6,000 7,000 8,000 9,000
ASME certified vessels: Standard CRN approved vessels (selected provinces): Standard cUL & UL control panel: Standard Max inlet air temperature: 120° F Min/max ambient air temp.: 25° F/110° F (BPD) 25° F/105° F (EHD) Min/max operating pressure: 85psig/125psig (BPD) 100psig/125psig (EHD) Average purge air:
106x65x114 106x82x114 130x82x134 130x82x134 130x82x134 130x82x134
15,000 19,000 19,000 28,000
CF CF CF CF CF CF
3%* (BPD), 7% (EHD) * With dry air cooling activated
CF CF CF CF CF
How to Find Air Flow Capacity
10,000
EHD Series Specifications
Airflow capacity = Nominal capacity of dryer x Factor F1 x Factor F2 Example: A EHD-500 has a nominal capacity of 500 SCFM. What is the maximum allowable flow through the dryer at following operating conditions? Air Inlet Pressure: 110 PSIG (7.6 BARG) F1 = 1.04 Air Inlet Temperature: 105° F (40.50° C) F2 = 0.93 Airflow capacity = 500 x F1 x F2 Airflow capacity = 500 x 1.04 x 0.93 = 483.6 SCFM This is the maximum airflow rate that the dryer can accept under those operating conditions. How to Select a Suitable Dryer for a Given Capacity Minimum Std. Airflow = Design Airflow / Factor F1 / Factor F2 Example: Given the operating parameters below, find a suitable dryer.
200 250 300 400 500 600 800 900
1” NPT
950
42x38x89 43x43x90 43x43x90 47x45x92 47x45x92 47x45x92 80x60x92 80x60x95
1 1 ⁄ 1 1 ⁄
2 ” NPT 2 ” NPT
1,100 1,250 1,500 1,600 2,100 2,500 2,800 4,100 4,700 4,900 5,300 6,200 7,600 8,300
2” NPT 2” NPT 2” NPT 3” FLG 3” FLG 3” FLG 3” FLG 3” FLG 4” FLG 4” FLG 6” FLG 6” FLG
1,000 1,250 1,500 2,000 2,500 3,000 3,500
80x60x95 80x60x95 80x60x95 85x68x113 85x68x113 125x82x134 125x82x134
Capacity Correction Factors for Differing Inlet Air Temperatures °F 70 80 90 100 105 110 115 120 Factor 1.12 1.10 1.06 1.00 0.93 0.86 0.80 0.75 Capacity Correction Factors for Differing Operating Pressure Operating Pressure PSIG 50 60 70 80 90 100 110 120 130 140 150 175 200 225 250 Factor 0.56 0.65 0.74 0.83 0.91 1.00 1.04 1.08 1.12 1.16 1.20 1.29 1.37 1.45 1.52
Design Flow Rate: 950 SCFM Inlet Air Pressure: 110 PSIG Inlet Air Temperature:105° F
F1 = 1.04
F2 = 0.93 Minimum Std. Airflow = 950/1.04/0.93 = 982.22 Therefore, the model suitable for the conditions above is EHD-1000.
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v1.5 8-25-2023
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