A desiccant dryer is a specialised device used to remove moisture from compressed air or other gases, ensuring the air is dry and suitable for various industrial applications. It operates by passing the moist air through a desiccant material, which adsorbs the water vapour.
Key Features
Wide range with 19 standard models
Capacities from 6.3 m3/hr. to 2030 m3/hr. Higher capacities are available on request
Atmospheric dew point achievable (-) 40°C to (-) 60°C
Electronic controls/solid-state timers for automatic and reliable operation
Low power consumption
Equipped with a muffler on the purge air outlet to reduce the noise level
Specially graded desiccant Delsorb 10 and Delsorb 21 for optimum performance and long life
Optional Features
Humidity indicator
Filters and/or total dryer bypass line with valves
Special Delair Filters for removal of water, oil mists, oil vapour and dust particles with electronically operated drain valves
Explosion-proof controls for offshore application
Construction according to various codes
Std. Working Parameters
Working Pressure: 5 to 14 kg/cm2(g)
Air inlet temperature: 40°C
Ambient temperature: 40°C
Desiccant Dryer is based on the principle of heatless regeneration and the physical properties of desiccant to adsorb and desorb water vapour. It uses the pressure swing principle/purge air to generate the desiccant bed.
The Desiccant Dryer has two pressure vessels/towers filled with desiccant. While the air is dried in one tower/vessel, the desiccant in the other is regenerated, thus maintaining a continuous and automatic operation.
Drying: The wet compressed air is led into one of the adsorber towers through solenoid valves in the smaller models and pneumatically controlled valves in the bigger models. This wet compressed air is passed through a specially designed sieve tube for a uniform flow of air through the desiccant tower, where it is dried. Part of this dried air is taken out and used for purging or reactivating the desiccant of the tower saturated with moisture. The balance dry air leaves the dryer through a check valve.
Regeneration: The purge air with a low water vapour pressure is passed over the desiccant (saturated with adsorbed moisture). The desiccant loses the adsorbed moisture, which is expelled into the atmosphere via an outlet valve through a muffler. Now, the desiccant is dry and ready for adsorption. The heat of adsorption released during this process raises the temperature of the desiccant, which in turn stimulates the liberation of the adsorbed water vapour and, thus, the regeneration.
Change Over: After a preset time, the desiccant in the first tower needs to be regenerated as it is saturated with the adsorbed moisture. The outlet purge air valve of the second tower is energised in a sequence, where the outlet valve closes first to pressurise the adsorbent in the tower in regeneration mode. The second tower becomes the adsorber while the first changes to regeneration mode. The wet compressed air now passes through the freshly regenerated adsorber tower, thus setting up a continuous process.
MODEL No.
CAPACITY IN M3/HR.
PRESSURE IN KG/CM2 (G)
CONNECTION
BSP FEMALE /
FLANGE (IN INCHES)
DIMENSIONS
(IN MM)
WEIGHT
(IN KGS)
5
6
7
8
9
10
11
12
13
14
L
W
H
DD-6
4.5
5.4
6.3
7.1
8.0
8.9
9.8
10.7
11.6
12.5
1/4″ BSP
410
350
660
20
DD-12
8.9
10.7
12.5
14.3
16.1
17.9
19.6
21.4
23.2
25.0
1/4″ BSP
420
350
700
22
DD-25
17.9
21.4
25.0
28.6
32.1
35.7
39.3
42.9
46.4
50.0
1/4″ BSP
455
350
760
29
DD-55
38.9
46.6
54.4
62.2
70.0
77.7
85.5
93.3
101.1
108.8
1/2″ BSP
585
400
1560
100
DD-85
60.4
72.4
84.5
96.6
108.6
120.7
132.8
144.9
156.9
169.0
1/2″ BSP
690
450
1480
120
DD-110
78.2
93.9
109.5
125.1
140.8
156.4
172.1
187.7
203.4
219.0
3/4″ FLANGE
735
500
2025
160
DD-170
120.7
144.9
169.0
193.1
217.3
241.4
265.6
289.7
313.9
338.0
1″ FLANGE
815
630
1585
190
DD-255
181.1
217.3
253.5
289.7
325.9
362.1
398.4
434.6
470.8
507.0
1″ FLANGE
815
630
2025
230
DD-340
241.4
289.7
338.0
386.3
434.6
482.9
531.1
579.4
627.7
676.0
1.1/2″ FLANGE
855
680
1925
305
DD-425
301.8
362.1
422.5
482.9
543.2
603.6
663.9
724.3
784.6
845.0
1.1/2″ FLANGE
855
680
2200
345
DD-555
394.7
473.7
552.6
631.6
710.5
789.5
868.4
947.4
1026.3
1105.3
1.1/2″ FLANGE
1060
750
2100
420
DD-680
482.9
579.4
676.0
772.6
869.1
965.7
1062.3
1158.9
1255.4
1352.0
2″ FLANGE
1055
1200
2200
710
DD-850
603.6
724.3
845.0
965.7
1086.4
1207.1
1327.9
1448.6
1569.3
1690.0
2″ FLANGE
1205
1200
2200
800
DD-1100
784.6
941.6
1098.5
1255.4
1412.4
1569.3
1726.2
1883.1
2040.1
2197.0
2″ FLANGE
1260
1250
2270
910
DD-1235
877.6
1053.1
1228.6
1404.1
1579.7
1755.2
1930.7
2106.2
2281.7
2457.3
2.1/2″ FLANGE
1260
1350
2465
1030
DD-1400
994.7
1193.6
1392.6
1591.5
1790.4
1989.4
2188.3
2387.2
2586.2
2785.1
2.1/2″ FLANGE
1260
1350
2650
1100
DD-1520
1086.4
1303.7
1521.0
1738.3
1955.6
2172.9
2390.1
2607.4
2824.7
3042.0
2.1/2″ FLANGE
1260
1350
2800
1150
DD-1700
1207.1
1448.6
1690.0
1931.4
2172.9
2414.3
2655.7
2897.1
3138.6
3380.0
3″ FLANGE
1455
1550
2750
1430
DD-2030
1448.6
1738.3
2028.0
2317.7
2607.4
2897.1
3186.9
3476.6
3766.3
4056.0
3″ FLANGE
1515
1550
2660
1560
DelCare
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The Delair FDI Series – Standard Series offers compact, lightweight, and cost-effective solutions, eliminating the need for extensive floor space. With a small footprint, it integrates commercial unit aesthetics with industrial ruggedness. Featuring high-performance desiccant rotors and optional stainless steel construction, it’s versatile, applicable to diverse industries. Its largest capacity range (170 CMH to 4500 CMH) suits pharmaceuticals, food processing, electronics, and more. Simple operation and the patented EcoDry rotor technology ensure efficient moisture control, making it an indispensable, little giant in industrial dehumidification, ideal for various applications worldwide.
The Delair FDI Series – Standard Series offers compact, lightweight, and cost-effective solutions, eliminating the need for extensive floor space. With a small footprint, it integrates commercial unit aesthetics with industrial ruggedness. Featuring high-performance desiccant rotors and optional stainless steel construction, it’s versatile, applicable to diverse industries. Its largest capacity range (170 CMH to 4500 CMH) suits pharmaceuticals, food processing, electronics, and more. Simple operation and the patented EcoDry rotor technology ensure efficient moisture control, making it an indispensable, little giant in industrial dehumidification, ideal for various applications worldwide.
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