Champion CRN Series, Instruction Manual

Page: 10 / 20

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