A refrigeration dryer is a system designed to remove moisture from compressed air by cooling it. It plays a vital role in industrial applications, ensuring that compressed air remains dry and free from water vapour, which can otherwise cause corrosion, damage equipment, and reduce efficiency.
Key Features
Available in 45 standard models
Provides best pressure dew point from +3°C to +4°C
Microprocessor-based delSmart LCD card to read out dew point, operating status, faults indication
Proprietary heat exchanger
Filled with eco-friendly refrigerant
Energy saving
Designed especially for tropical conditions
Unique volume liquid accumulator
Compact design
Adhere to ISO 7183 standards
Optional Features
Available in both options, with an automatic expansion valve or with the thermostatic expansion valve
Explosion-proof controls for offshore application
Std. Working Parameters
Pressure: 7.0 kg/cm (g)
Max. Working Pressure: 14kg/cm (g)
Air Inlet Temperature: 45°C
Ambient Temperature: 45°C
Water Pressure: 3-6 kg/cm (g)
Water Inlet Temperature: 32°C
Delair Refrigeration type Dryer operates by cooling the air to near freezing point to remove the moisture. The cold air is reheated by the incoming air to approximately 10°C below the incoming compressed air temperature at nominal conditions.
The Refrigeration Dryer consists of an air drying unit with a centrifugal cum demister pad condensate separator and a refrigeration circuit. The refrigeration circuit consists mainly of a compressor, a condenser, a receiver, a volume liquid accumulator with liquid refrigerant and an evaporator.
The air drying unit consists of two kinds of heat exchangers: an air-to-air heat exchanger and a refrigerant-to-air heat exchanger.
THE HEART OF THE SYSTEM IS THE PROPRIETARY HEAT EXCHANGER, WHICH MAKES IT OUTPERFORM OTHER DRYERS
The function of the air-to-air heat exchanger is to lower the load on the refrigerant system and warm the outgoing cold air pipelines to the required temperature.
The refrigerant-air heat exchanger(s) further cools the air to the required temperature, condensing the water vapour, which is automatically drained.
MODEL
CAPACITY
DIMENSIONS
(IN MM)
APPROX.
WT.
(IN KG.)
CONNECTION
(IN INCHES)
CONN.
LOAD
(IN KW)
WATER
QTY.
(IN
M3/HR)
CFM
CMH
Ltr./SEC.
L
W
H~
AIR
WATER
FDI-18 A
10.6
18
5
880
465
700
90
1/2″ BSP.
—
0.30
—
FDI-54 A
32
54
15
880
465
700
90
1/2″ BSP.
—
0.53
—
FDI-110 A
65
110
31
880
465
830
100
3/4″ BSP.
—
0.70
—
FDI-150 A
88
150
42
1100
465
930
270
1″ BSP.
—
0.75
—
FDI-180 A
106
180
50
1100
465
930
270
1″ BSP.
—
0.75
—
FDI-220 A
130
220
62
1100
465
930
270
1″ BSP.
—
0.97
—
FDI-290 A
170
290
81
1100
465
930
270
1″ BSP.
—
0.97
—
FDI-360 A
212
360
101
1250
750
1150
400
2″ F
—
1.70
—
FDI-430 A
254
430
120
1250
750
1150
400
2″ F
—
2.23
—
FDI-540 A
318
540
151
1250
750
1150
400
2″ F
—
2.63
—
FDI-600 A
355
600
168
1676
725
1210
500
2″ F
—
2.82
—
FDI-720 A
424
720
202
1676
725
1210
600
3″ F
—
3.16
—
FDI-850 A
500
850
238
1676
725
1210
600
3″ F
—
3.94
—
FDI-970 A
572
970
272
1676
725
1210
600
3″ F
—
4.24
—
FDI-1060 A
624
1060
297
1700
1000
1375
780
3″ F
—
4.74
—
FDI-1150 A
678
1150
322
1700
1000
1375
780
3″ F
—
5.44
—
FDI-1270 A
749
1270
356
1700
1000
1375
780
3″ F
—
5.44
—
FDI-1350 A
795
1350
378
1700
1000
1375
780
3″ F
—
5.44
—
FDI-1690 A
996
1690
473
1720
1050
1375
850
4″ F
—
7.62
—
FDI-1910 A
1124
1910
535
1800
1200
1600
1100
4″ F
—
10.84
—
FDI-2160 A
1271
2160
605
1800
1200
1600
1200
4″ F
—
10.84
—
FDI-2550 A
1500
2550
714
2200
1200
1600
1400
4″ F
—
12.00
—
FDI-2880 A
1695
2880
806
2400
1200
1600
1700
6″ F
—
14.41
—
FDI-3000 A
1770
3000
840
2400
1200
1600
1700
6″ F
—
16.32
—
FDI-3340 A
1971
3340
935
2500
1300
1800
2200
6″ F
—
16.32
—
FDI-4310 A
2543
4310
1207
2500
1300
1800
2600
6″ F
—
21.21
—
FDI-6000 A
3540
6000
1680
3000
1400
2000
3200
8″ F
—
26.15
—
FDI-540 W
318
540
151
1250
750
1150
380
2″ F
3/4″ BSP.
1.87
1.1
FDI-600 W
355
600
168
1676
725
1210
380
2″ F
3/4″ BSP.
1.87
1.8
FDI-720 W
424
720
202
1676
725
1210
520
3″ F
3/4″ BSP.
2.19
1.8
FDI-850 W
500
850
238
1676
725
1210
520
3″ F
3/4″ BSP.
2.48
1.8
FDI-970 W
572
970
272
1676
725
1210
520
3″ F
3/4″ BSP.
2.93
1.8
FDI-1060 W
624
1060
297
1350
750
1270
620
3″ F
3/4″ BSP.
2.93
3.0
FDI-1150 W
678
1150
322
1350
750
1270
620
3″ F
3/4″ BSP.
3.63
3.0
FDI-1270 W
749
1270
356
1350
750
1270
620
3″ F
3/4″ BSP.
3.63
3.0
FDI-1350 W
795
1350
378
1350
750
1270
620
3″ F
3/4″ BSP.
3.93
3.0
FDI-1690 W
996
1690
473
1680
840
1380
850
4″ F
1″ F
4.64
3.4
FDI-1910 W
1124
1910
535
1800
950
1500
1000
4″ F
1.1/2″ F
5.10
4.1
FDI-2160 W
1271
2160
605
1800
950
1500
1000
4″ F
1.1/2″ F
6.28
4.1
FDI-2550 W
1500
2550
714
2100
1000
1500
1300
4″ F
1.1/2″ F
7.28
5.1
FDI-2880 W
1695
2880
806
2400
1000
1530
1500
6″ F
1.1/2″ F
7.28
6.1
FDI-3000 W
1770
3000
840
2400
1000
1530
2000
6″ F
1.1/2″ F
8.03
6.1
FDI-3340 W
1971
3340
935
2100
1100
1650
2500
6″ F
1.1/2″ F
8.03
6.9
FDI-4310 W
2543
4310
1207
2300
1100
1650
2800
6″ F
2″ F
11.00
8.4
FDI-6000 W
3540
6000
1680
2600
1150
1900
3000
8″ F
2″ F
18.25
11.1
DelCare
Our wide network of trained Airgineers® is renowned for providing prompt and reliable services. They ensure regular maintenance of your machine and offer technical support for any required accessory changes or machine faults. For any maintenance or technical support queries, write to us at:
The FDI Series refrigeration dryer system cools compressed air to a low temperature so that water vapour condenses into liquid, reaching a pressure dew point of 4–6 °C. The separated moisture is then drained from the compressed air before it continues through the system.
An air refrigeration dryer for industry helps reduce moisture in compressed air by cooling and condensing water vapour. It is suitable for industrial compressed air applications where effective moisture control is required.
The FDI Series is available in 42 standard models with capacities from 18 m³/hr to 6,000 m³/hr (10.6 CFM to 3,540 CFM), allowing the dryer to accommodate different compressed air flow requirements.
Delair’s FDI Series removes moisture from compressed air using a patented foamed-in heat exchanger for efficient, reliable performance. Available in 42 standard models with a microprocessor-based Del-Smart LCD card that displays dew point, operating temp & status, and fault indications, it suits a wide range of industrial compressed-air requirements.
The FDI Series delivers a pressure dew point of 3–4 °C, operates at a standard working pressure of 7.0 kg/cm²(g) (maximum 16 kg/cm²(g)), and handles an air inlet temperature up to 55 °C. It is available with eco-friendly refrigerants such as R-134a ,R-407c and R 410 a — as an option — explosion-proof controls for offshore applications.
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