Technical Specifications Freedom Dryers 2 through 16,000 SCFM Main Features

Technical Specifications
Freedom Dryers
2 through 16,000 SCFM
Main Features
Van Air Freedom compressed air dryers
remove costly compressed air line moisture
effectively and economically. Specially
formulated Van Air absorbent desiccants
enable the Freedom dryer to provide a selfadjusting pressure dew point that is
automatically regulated by the inlet
temperature to the dryer.
All Van Air Freedom dryers feature...
Energy-Free, Environmentally
Friendly Operation
- No electricity is required for dryer operation.
- No refrigerants are needed. Dry-O-Lite®
desiccant is non-toxic, non-polluting and adds
no harmful acidity to the drain solution.
Material Safety Data Sheets and
independently conducted bioassay test results
are available on request.
Low Initial and Operating Costs
- No electrical costs, low pressure drop (less
than 1% of operating pressure), automatic
desiccant usage regulation based on air flow
and a low purchase price compared to other
dryer types save money.
Application and Installation
Versatility
- Ideal for a wide range of uses, the Freedom
dryer protects against freeze-ups in the winter
and liquid in the summer. It may be installed
indoors or out and can be incorporated into
stationary or portable compressed air
systems. It is also suitable for dusty and
hazardous locations.
Call Us for Larger or Engineered-toOrder Models for Your Application
Operation
Wet compressed air enters the bottom of the
dryer and flows upward through a bed of
desiccant which absorbs moisture as it slowly
dissolves. Condensate drops to the bottom to
be drained. Dry air exits the top.
The Freedom dryer automatically provides
a pressure dew point that is 20°F/11°C lower
than the inlet temperature to the dryer. If the
inlet air temperature to the dryer is 80°F/27°C,
the dryer will provide a 60°F/15.5°C pressure
dew point. If the inlet air temperature to the
dryer is 30°F/-1.1°C, the dryer will provide a
10°F/-12.2°C pressure dew point.
• Primer & enamel exterior finish
• 10-year warranty
Models D-12 through D-36 (75-850
scfm)
• Manual drain valve (1" NPT)
• Sight windows (2 - to check desiccant level)
• Elliptical direct entry hatch cover
• Pressure relief coupling
• Vessel fabricated to ASME Code, Section
VIII (models D-12 and D-16 UM stamped &
certified, models D-20 through D-36 U
stamped & certified)
• Epoxy interior coating
• Epoxy coated carbon steel bed support grid
• Primer & enamel exterior finish
• 10-year warranty
Models D-42 through D-156
(1250-16,000 scfm)
• Temperature gauge
• Temperature/pressure gauge
• High condensate level alarm (gauge
coupling may be used for installation on
models D-12 through D-20)
• Electric automatic ball valve drain
• Canadian Registration Number
Models D-42 through D-156
(1250-16,000 scfm)
• Pressure gauge
• Temperature gauge
• Temperature/pressure gauge
• High condensate level alarm
• Electric automatic ball valve drain
• Canadian Registration Number
Standard Equipment
Model D-2 (7 scfm)
• Manual drain valve (1/4" NPT)
• Sight window (to check desiccant level)
• Epoxy interior coating
• PVC plastic bed support grid
• Epoxy exterior finish
• 10-year warranty
Models D-4 and D-8 (10 & 50 scfm)
• Manual drain valve (1/2" NPT)
• Sight window (to check desiccant level)
• Vessel fabricated to ASME Code, Section
VIII, UM stamped & certified
• Epoxy interior coating
• Epoxy coated carbon steel bed support
grid
• Manual drain valve (1" NPT on D-42
through D-54, 2" NPT on D-60 through D156)
• Sight windows (2 - to check desiccant
level)
• Elliptical direct entry hatch cover
• Inspection coupling
• Pressure relief connection
• Vessel fabricated to ASME Code, Section
VIII and U stamped & certified
• Epoxy and polyurethane interior coating
• ABS plastic bed support grid
• Primer & enamel exterior finish
• 10-year warranty
Optional Equipment
Model D-2 (7 scfm)
• Pressure gauge kit
Models D-4 and D-8 (10 & 50 scfm)
• Pressure gauge kit
• Canadian Registration Number
Models D-12 through D-36
(75-850 scfm)
• Pressure gauge
Dimensions and Specifications
D-2
D-4 through D-8
Rated Flow
@ 100 psig
(6.9 bar)
A
MODEL
SCFM Nm3/hr in cm
NO.
B
in cm
C
in cm
D-2
7
11.3
3.5
D-4
D-8
10
50
16.1
80
4.5 11.5
8.5 21.5
28
35
71
89
7
9.5
18
24
D-12
D-16
D-20
D-24
D-30
D-36
100
155
250
375
625
850
161
249
402
603
1005
1367
13
16
20
24
30
37
33
41
51
61
76
94
51
55
56
59
64
70
130
140
142
150
163
178
14
15.5
16
17
22
25
36
39
41
43
56
64
1250
1500
2000
2500
3000
3500
4000
4500
5500
6000
7000
7500
8500
9500
10500
11500
12500
13500
16000
2010
2412
3215
4019
4823
5627
6431
7235
8842
9646
11254
12058
13665
15273
16881
18489
20096
21704
25723
43
49
55
61
67
73
79
85
91
97
103
109
115
121
127
133
140
146
158
109
124
140
155
170
185
201
216
231
246
262
277
292
307
323
338
356
371
401
86
91
94
97
100
110
115
124
127
130
137
139
142
145
148
157
155
158
168
218
231
239
246
254
279
292
315
323
330
348
353
361
368
376
399
394
401
427
16
18.5
18.5
18.5
18.5
18.5
21
21
21
21
25
24
24
24
24
24
24
24
28
41
47
47
47
47
47
53
53
53
53
64
61
61
61
61
61
61
61
71
D-42
D-48
D-54
D-60
D-66
D-72
D-78
D-84
D-90
D-96
D-102
D-108
D-114
D-120
D-126
D-132
D-138
D-144
D-156
9
12.5 32
D-12 through D-36
D
in cm
E
in cm
11.8 30
22.5 57
28 71
38
42
43
44
45
49
97
107
109
112
114
124
8.5
13
16
16
24
24
22
33
41
41
61
61
F
D-42 through D-156
In/Out Filler Hatch Vessel
Weight
Opening
Conn.
lbs
kg
in
in
Initial Fill*
Dry-O-Lite
lbs
kg
in
cm
1.2
3
½ NPT Removable
4
1.8
2
0.9
5.1
5.1
13
13
¾ NPT
¾ NPT
2 NPT
2 NPT
30
60
14
27
6
30
2.7
14
2 NPT
2 NPT
2 NPT
2 NPT
3 NPT
3 FLG
4x3
4x3
4x6
4x6
4x6
4x6
130
145
210
285
640
780
59
65
95
128
290
353
130
220
360
500
710
1130
59
100
163
227
322
513
4 FLG
4 FLG
4 FLG
4 FLG
6 FLG
6 FLG
6 FLG
6 FLG
6 FLG
6 FLG
8 FLG
8 FLG
8 FLG
8 FLG
8 FLG
8 FLG
10 FLG
10 FLG
10 FLG
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
12 x 16
1275
2150
2640
2700
3200
4075
4775
5700
7200
7800
9000
10300
12440
12900
15800
16700
17800
18900
21000
580
975
1195
1225
1450
1850
2165
2585
3265
3540
4080
4670
5645
5850
7165
7575
8075
8570
9525
1700 770
2300 1045
2900 1315
3600 1635
4400 1995
6300 2860
7400 3355
10000 4535
11000 4990
13000 5895
14000 6350
16000 7255
18000 8165
20000 9070
22000 9980
24000 10885
27000 12245
29000 13155
34000 15420
*Price of dryer includes initial fill of Dry-O-Lite® desiccant. Additional Dry-O-Lite is sold in 50 lb. bags, 50 lb. pails, 506 lb. metal drums and
2000 lb. bulk bags.
Due to our policy of continuous improvement, dimensions and specifications may change without notice. Request certified drawing for
pre-piping. Contact factory for larger or special models.
Maximum Capacities - scfm (Nm3/hr)
MODEL
NO.
D-2
D-4
D-8
D-12
D-16
D-20
D-24
D-30
D-36
D-42
D-48
D-54
D-60
D-66
D-72
D-78
D-84
D-90
D-96
D-102
D-108
D-114
D-120
D-126
D-132
D-138
D-144
D-156
5 psig
0.3 bar
1.2
1.9
1.7
2.8
8.6
14
17
28
27
43
43
69
64
104
107
173
146
235
215
345
258
414
344
552
429
690
515
828
601
966
687
1105
773
1243
945
1519
1031
1657
1202
1933
1288
2071
1460
2347
1632
2623
1803
2899
1975
3175
2147
3452
2319
3728
2748
4418
10 psig
0.7 bar
1.5
2.4
2.2
3.5
11
17
22
35
33
54
54
87
81
130
135
216
183
294
269
433
323
519
431
692
538
866
646
1039
754
1212
861
1385
969
1558
1184
1904
1292
2077
1507
2423
1615
2597
1830
2943
2046
3289
2261
3635
2476
3981
2692
4328
2907
4674
3446
5539
15 psig
1.0 bar
1.8
2.9
2.6
4.2
13
21
26
42
40
65
65
104
97
156
162
260
220
354
324
520
388
624
518
833
647
1041
777
1249
906
1457
1036
1665
1165
1873
1424
2290
1554
2498
1813
2914
1942
3122
2201
3538
2460
3955
2719
4371
2978
4787
3237
5204
3496
5620
4143
6661
25 psig
1.7 bar
2.4
3.9
3.5
5.6
17
28
35
56
54
86
87
139
130
209
216
348
294
473
433
696
519
835
692
1113
865
1391
1038
1669
1211
1948
1384
2226
1558
2504
1904
3061
2077
3339
2423
3895
2596
4173
2942
4730
3288
5286
3634
5843
3980
6399
4327
6956
4673
7512
5538
8903
50 psig
3.4 bar
3.9
6.3
5.6
9.1
28
45
56
91
87
141
141
227
212
340
353
567
479
771
705
1134
846
1360
1128
1814
1410
2267
1692
2721
1974
3174
2256
3627
2538
4081
3102
4988
3384
5441
3949
6348
4231
6802
4795
7708
5359
8615
5923
9522
6487
10429
7051
11336
7615
12243
9025
14510
75 psig
5.2 bar
5.5
8.8
7.8
12.6
39
63
78
126
121
195
196
314
293
471
489
786
665
1069
978
1572
1173
1886
1564
2515
1955
3143
2346
3772
2737
4401
3128
5029
3519
5658
4301
6915
4692
7544
5474
8801
5865
9430
6647
10687
7429
11944
8211
13202
8993
14459
9776
15716
10558
16973
12513
20117
100 psig
6.9 bar
7
11.3
10
16.1
50
80
100
161
155
249
250
402
375
603
625
1005
850
1367
1250
2010
1500
2412
2000
3215
2500
4019
3000
4823
3500
5627
4000
6431
4500
7235
5500
8842
6000
9646
7000
11254
7500
12058
8500
13665
9500
15273
10500
16881
11500
18489
12500
20096
13500
21704
16000
25723
125 psig
8.6 bar
8.5
13.7
12.2
19.6
61
98
122
196
189
304
304
490
457
734
761
1224
1035
1664
1522
2448
1827
2937
2436
3916
3045
4895
3654
5874
4263
6853
4872
7832
5481
8812
6699
10770
7308
11749
8526
13707
9135
14686
10353
16644
11571
18602
12789
20560
14007
22518
15224
24476
16442
26435
19487
31330
150 psig
10.3 bar
10.1
16.2
14.4
23.1
72
115
144
231
223
358
359
577
538
866
897
1443
1221
1962
1795
2886
2154
3463
2872
4617
175 psig
12.1 bar
11.6
18.6
16.5
27
83
133
165
266
256
412
413
665
620
997
1034
1662
1406
2260
200 psig
13.8 bar
13.1
21
19
30
94
150
187
301
290
466
468
752
702
1129
1170
1881
250 psig
17.2 bar
16.2
26
23
37
115
186
231
371
358
575
MWP: D-2 = 300 psig, D-4 through D-16 = 250 psig, D-20 through D-30 = 200 psig, D-36 = 175 psig, D-42 through D-54 = 150 psig, D-60
and larger = 125 psig. Higher pressures available on request.
Sizing Instructions
1. Determine the highest anticipated flow (peak load volume of the compressor). If this must be estimated, use a ratio of 4 to 5 scfm per
compressor horsepower.
2. Determine the minimum operating pressure.
3. On the chart above, locate the column for the minimum operating pressure and read down to the capacity that meets or exceeds the scfm
requirement; then find the corresponding dryer model in the left column.
Example: For an installation that will operate at 125 psig and handle a flow of 3000 scfm, select model D-60.
Dry-O-Lite® Desiccant
Non-toxic and non-polluting Dry-O-Lite®
desiccant dissolves slowly, making it a longlasting desiccant that keeps operating costs
low. With most single-shift operations,
desiccant only needs to be added to the dryer a
couple of times per year.
Formed of hygroscopic materials compacted
into tablets under high pressure, Dry-O-Lite
creates a structured bed within the dryer that,
unlike some competitive desiccants, will not
crush under its own weight.
Each tablet maintains a definite shape.
Minimal contact points expose almost all
surface areas and air flows freely around the
tablets for greatest efficiency and low pressure
drop.
Tablets continue to absorb moisture until
they are completely consumed and Dry-O-Lite
adds no harmful acidity to the solution, unlike
some competitive formulations.
Packaged in 50 lb. (23 kg) multiple-layered
heat sealed bags or plastic resealable pails,
Dry-O-Lite has an unlimited shelf life. It is also
available in 506 lb. metal drums and 2000 lb.
bulk bags with pour spouts for easy filling of
larger dryers.
Material Safety Data Sheets and
independently conducted bioassay test results
are available on request.
Other desiccants with enhanced dew point
performance are also available.
Desiccant Usage
• Automatically adjusts to system demand
• Proportional to moisture loading
• Each 20°F change in inlet temperature to
the dryer changes moisture loading by a
factor of nearly 2:1. (Inlet temperature to
the dryer is affected by the trim cooler see Typical System Installation below.)
Usage Example:
Based on 2000 hrs. (1 shift for 1 year) @100
psig and a 75°F average inlet temperature
to the dryer:
Flow (scfm)
Desiccant Usage (lbs./yr.)
10
13
50
65
100
130
500
650
1000
1300
Typical System Installation
For greatest operating efficiency, locate the
dryer at the highest practical pressure
(which does not exceed the maximum working
pressure of the dryer) and the lowest
possible temperature. More air can be
processed through the dryer at higher
pressures and less desiccant will be
consumed at lower temperatures. Choose the
indoor or outdoor location which provides the
coolest ambient temperature. Inlet
temperatures above 100°F are not
recommended. A Van Air trim cooler may be
needed to provide additional cooling.
Installation requires air inlet and outlet
connections, bypass piping with three valves
and provision for drain solution disposal. A
motorized ball valve-type drain is
recommended and is available from Van Air.
If large quantities of compressor lubricant
are present in the system, a coalescing
prefilter is recommended to protect the
desiccant bed. A filter downstream of the
dryer will prevent desiccant dust from
reaching equipment. For your convenience,
both are also offered by Van Air.
A high level alarm is also available to
sense high condensate levels within the dryer.
Refer to the Installation, Operation and
Maintenance manual for specific instructions
on your dryer model.
2950 Mechanic Street, Lake City, PA 16423 USA
Phone: (814) 774-2631, (800) 840-9906
Technical Sales Fax: 814/774-4065
E-mail: vanair@vanairsystems.com
www.vanairsystems.com
TECH1FREED/0601/DP3
© 2001 Van Air Systems Inc.