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Aircel AHLD E-Series
Heatless Desiccant Dryer

70 - 8,000 scfm
Aircel Designed for maximum energy savings, the Aircel AHLD E-Series dryers are reliable, fully automatic, heatless desiccant dryers with integrated Energy Management System for purge reduction. Each model combines innovative engineering and technically advanced, highly durable components to produce the most reliable heatless dryers available on the market. The Aircel Programmable Controller (APC) provides complete, reliable control of the system with text descriptions of each step in the sequence of operation. The AHLD E-Series reliable operation and robust valving requires virtually no user adjustment or maintenance. Our precision engineered components and design deliver outstanding service life and operational durability. For ease of installation, ultimate dryer protection, and downstream customer process protection, the AHLD E-Series comes complete with standard filtration system consisting of inlet coalescing pre-filter with automatic drain and outlet particulate after filter with manual drain.

• Heatless adsorption produces continuous low dew point without heat and dew point spikes at switchover. This provides a simple, reliable, and cost-effective compressed air dryer system.
• Integrated Energy Management System maximizes your return on investment by delivering significant energy savings even during various loads and air demands.
• A relative humidity sensor with light and alarm is included in the middle of each tower to maintain dew point.
• Integrated Energy Management System maximizes your return on investment by delivering significant energy savings during varying loads and air demands.
• Constant mid-bed desiccant humidity monitoring ensures a low outlet dew point throughout cycle.
• Controller displays energy savings (hours), cycle modes (dryer operation) and alarm conditions.
• Outlet dew point selection and dew point displayed (provided with outlet dew point monitoring option)


The Aircel Programmable Controller (APC) with Energy Management System (EMS) is standard on the AHLD E-Series dryer systems. This EMS, or demand cycle control system, reduces purge air and optimizes dryer performance by monitoring the moisture at the mid portion of the tower desiccant bed. This allows for quick response to moisture changes while maintaining the low outlet dew point. The control system automatically adjusts the regeneration cycle, maintaining outlet dew point and extending the drying cycle during periods of lower loading. Switching is less frequent, reducing dryer maintenance and fully utilizing desiccant capacity. This addition improves reliability and performance while sustaining the low outlet dew point. The end result is an overall purge reduction and significant energy savings.
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   Model
Catalog Order
Number
Capacity
Voltage
Connection
AHLD-70 E
AG9932540
70
115-1-60
¾" NPT
AHLD-100 E
AG9932640
100
115-1-60
1" NPT
AHLD-150 E
AG9932740
150
115-1-60
1" NPT
AHLD-200 E
AG9932840
200
115-1-60
1½" NPT
AHLD-250 E
AG9932940
250
115-1-60
1½" NPT
AHLD-300 E
AG9933040
300
115-1-60
1½" NPT
AHLD-350 E
AG9933140
350
115-1-60
2" NPT
AHLD-450 E
AG9933240
450
115-1-60
2" NPT
AHLD-500 E
AG9933340
500
115-1-60
2" NPT
AHLD-600 E
AG9933440
600
115-1-60
2" NPT
AHLD-750 E
AG9933540
750
115-1-60
2" NPT
AHLD-1000 E
AG9933640
1,000
115-1-60
3" FLG
AHLD-1250 E
AG9933740
1,250
115-1-60
3" FLG
AHLD-1500 E
AG9933840
1,500
115-1-60
3" FLG
AHLD-2000 E
AG9933940
2,000
115-1-60
4" FLG
AHLD-2500 E
AG9934040
2,500
115-1-60
4" FLG
AHLD-3000 E
AG9934140
3,000
115-1-60
4" FLG
AHLD-3500 E
AG9934240
3,500
115-1-60
6" FLG
AHLD-4000 E
AG9934340
4,000
115-1-60
6" FLG
AHLD-4500 E
AG9934440
4,500
115-1-60
6" FLG
AHLD-5000 E
AG9934540
5,000
115-1-60
6" FLG
AHLD-6000 E
AG9934550
6,000
115-1-60
6" FLG
AHLD-7000 E
AG9934560
7,000
115-1-60
8" FLG
AHLD-8000 E
AG9934570
8,000
115-1-60
8" FLG
Capacity rated in accordance with CAGI ADF 200 @ 100 psig, 100°F inlet, 100°F ambient and a PDP of -40°F
Operating pressure: 60 to 180 psig (models 70 - 750); 60 - 135 psig (models 1,000 - 8,000)
Ambient air temperature: 38°F to 120°F
Inlet air temperature: 40°F to 120°F
For larger capacities, higher pressures, and custom dryer options, please contact an Mdi representative

➤Click Here for Capacity Correction Factors Chart

How It Works

• Compressed air flows through the pre-filter to remove oil and then enters the on-line Tower 1 through valve (A).

• Air moves upward, where the desiccant removes moisture from the air stream. The majority of clean, dry compressed air exits valve (B) and cycles through the after filter to then flows downstream.

• During the drying process, a small amount of the clean air exiting valve (B) travels to Tower 2 (shown in regeneration mode) to assist in the regeneration process

• To regenerate Tower 2, valve (C) opens and the tower is depressurized to near atmospheric pressure. The air flowing from valve (B) moves down the tower, removing moisture from the desiccant bed. Once it travels to the bottom of Tower 2, it exits the tower through valve (C) and the exhaust muffler to ambient.

• Once Tower 2 is fully regenerated, valve (C) will close, repressurizing Tower 2 to line pressure with the slight airflow coming through valve (B).

• Next, valve (D) will open to depressurize Tower 1 and valve (A) will switch (not pictured), directing wet incoming air to Tower 2 for drying while Tower 1 is regenerating the desiccant bed.

• This process will repeats continuously every 5 minutes unless the Energy Management System is extending drying time period during low load conditions to a maximum of 30 minutes each cycle. The Energy Management System continually monitors the mid-bed humidity level in the drying tower to save energy by extending the drying cycle (up to 30 minutes).
How Aircel AHLD Series Works


Recommended Installation




Optional Equipment
• Remote start/stop control
• Stainless steel desiccant supports and air diffusers to prevent channeling
• Counter current regeneration, upflow drying, and downflow depressurization
3/16" premium grade F200 activated alumina high capacity desiccant for pressure dew point performance
• Easy installation with single point connection for electrical supply power and inlet/outlet air connections
• Dry relay contact alarm for remote indication of system alarms
• Adjustable (5 & 10 minute) NEMA cycle
• Standard communication through RS-232/RS-485 combo port




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Model
Weight (lbs)
Height (in)
Width (in)
Depth (in)
AHLD-70 E
410
72
26
22
AHLD-100 E
490
75
30
24
AHLD-150 E
560
75
30
24
AHLD-200 E
800
85
34
24
AHLD-250 E
870
85
34
24
AHLD-300 E
990
86
46
30
AHLD-350 E
1,020
87
46
30
AHLD-450 E
1,140
87
46
30
AHLD-500 E
1,250
89
50
30
AHLD-600 E
1,450
89
50
30
AHLD-750 E
1,850
90
50
30
AHLD-1000 E
2,800
94
66
40
AHLD-1250 E
4,000
98
70
40
AHLD-1500 E
4,600
99
70
40
AHLD-2000 E
5,800
109
82
50
AHLD-2500 E
7,800
120
109
65
AHLD-3000 E
9,200
120
118
65
AHLD-3500 E
9,900
120
120
70
AHLD-4000 E
10,900
120
128
70
AHLD-4500 E
12,100
120
128
70
AHLD-5000 E
13,200
131
138
80
AHLD-6000 E
15,800
131
138
80
AHLD-7000 E
17,700
156
148
97
AHLD-8000 E
19,300
164
150
97