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5.0 REFERENCE
SIZING
Determining dryer capacity at actual operating conditions
To determine the maximum inlet flow capacity of a dryer
at various operating conditions, multiply the rated capacity
from Table 1 by the multipliers shown in Table 2.
Example: How many scfm can an air-cooled model 1.5 handle
when compressed air to be dried is at 200 psig and 100°F;
ambient air temperature is 80°F?
Answer: 160 x 1.22 x 1.12 = 218 scfm.
TABLE 1
Rated capacity (scfm) and pressure drop @ 100 psig inlet
pressure, 100°F inlet temperature, and 100°F ambient
temperature
MODEL
Rated capacity
60 Hz
of air-cooled
50 Hz
models (scfm)
MODEL
Rated capacity
60 Hz
of air-cooled
50 Hz
models (scfm)
TABLE 2
Air capacity correction factors (Multipliers)
INLET COMPRESSED AIR CONDITIONS
INLET
PRESSURES
80°F
psig
kgf/cm
27°C
2
50
3.5
1.35
80
5.6
1.50
100
7.0
1.55
125
8.8
1.63
150
10.5
1.70
175
12.3
1.75
200
14.0
1.80
COOLING MEDIUM*
AMBIENT
MULTIPLIER
TEMPERATURE
°F
°C
80
27
1.12
90
32
1.06
100
38
1.00
110
43
0.94
*Air-cooled models; water-cooled models use 1.15 multiplier if cooling
water is below 35°C, 95°F.
0.5
0.75
1.0
1.5
50
70
100
160
42
58
83
133
2.0
2.5
3.5
200
240
330
167
200
275
INLET TEMPERATURES
90°F
100°F
110°F
32°C
38°C
43°C
1.05
0.84
0.69
1.17
0.95
0.79
1.23
1.00
0.82
1.31
1.07
0.91
1.37
1.13
0.95
1.42
1.18
0.99
1.47
1.22
1.03
120°F
49°C
0.56
0.66
0.70
0.74
0.80
0.84
0.89
17
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