Reference Sizing - Gardner Denver RNC125 Instruction Manual

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 RNC750
handle when compressed air to be dried is at 200 psig and
100°F; ambient air temperature is 80°F?
Answer: 750 x 1.22 x 1.12 = 1,025 scfm.
TABLE 1
Rated capacity (scfm) and pressure drop @ 100 psig inlet
pressure, 100°F inlet temperature, and 100°F ambient
temperature
RNC MODEL
Rated capacity 60 Hz
of air-cooled 50 Hz
models (scfm)
RNC 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 2 27°C
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.
100 125 150 200
100 125 150 200
84 105 125 170
300 400 500 600
300 400 500 600
250 340 420 540
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
250
250
210
750
750
630
120°F
49°C
0.56
0.66
0.70
0.74
0.80
0.84
0.89
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