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10
COOLING MEDIUM*
AMBIENT
TEMPERATURE
MULTIPLIER
°
F
°
C
80
27
1.12
90
32
1.06
100
38
1.00
110
43
0.94
INLET COMPRESSED AIR CONDITIONS
INLET
INLET TEMPERATURES
PRESSURES
80
°
F
90
°
F
100
°
F
110
°
F
psig
kgf/cm
2
27
°
C
32
°
C
38
°
C
43
°
C
50
3.5
1.35
1.05
0.84
0.69
80
5.6
1.50
1.17
0.95
0.79
100
7.0
1.55
1.23
1.00
0.82
125
8.8
1.63
1.31
1.07
0.91
150
10.5
1.70
1.37
1.13
0.95
175
12.3
1.75
1.42
1.18
0.99
200
14.0
1.80
1.47
1.22
1.03
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 750 scfm
model handle when compressed air to be dried is at 200
psig and 100
°
F; ambient air temperature is 80
°
F; and a
38
°
F dew point temperature is desired?
Answer: 750 x 1.22 x 1.12 x 1.0 = 1,025 scfm.
TABLE 2
Air capacity correction factors (Multipliers)
MODELS
125
150
200
250
300
400
500
750
Rated capacity 60 Hz
125
150
200
250
300
400
500
750
of air-cooled
50 Hz
104
125
167
208
250
333
417
625
models (scfm)
TABLE 1
Rated capacity (scfm) and pressure drop @ 100 psig inlet
pressure, 100
°
F inlet temperature, and 100
°
F ambient
temperature
*Air-cooled models; water-cooled models use 1.15 multiplier if cooling
water is below 35
°
C, 95
°
F.
OUTLET DEWPOINT
DEWPOINT
TEMPERATURE
MULTIPLIER
°
F
°
C
38
3
1.0
45
7
1.2
50
10
1.3
Summary of Contents for CRN Series
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