Reference Sizing - Gardner Denver RNC Series Instruction Manual

5.0 REFERENCE
SIZING
Determining dryer capacity at actual operating conditions.
To determine the maximum inlet flow capacity of a dryer at vari-
ous operating conditions, multiply the rated capacity from Table
1 by the multipliers shown in Table 2.
Example: How many scfm can a 60 Hz air-cooled model 1000
handle when compressed air to be dried is at 200 psig and 100°F;
ambient air temperature is 80°F?
Answer: 1,000 x 1.22 x 1.12 = 1,366 scfm.
TABLE 1
Rated capacity (scfm) @ 100 psig inlet pressure, 100°F inlet
temperature, and 100°F ambient temperature.
MODEL 1000 1250
Rated capacity 60 Hz 1000 1250
of air-cooled 50 Hz 830 1050
models (scfm)
TABLE 2
Air capacity correction factors (Multipliers)
INLET COMPRESSED AIR CONDITIONS
INLET TEMPERATURES
INLET
PRESSURES 80°F 90°F
psig barg 27°C 32°C
50 3.4 1.35 1.05
80 5.5 1.50 1.17
100 6.9 1.55 1.23
125 8.6 1.63 1.31
150 10.3 1.70 1.37
175 12.1 1.75 1.42
200 13.8 1.80 1.47
COOLING MEDIUM*
AMBIENT
TEMPERATURE MULTIPLIER
°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 95°F (35°C).
1500 1750 2000 2500
1500 1750 2000 2500
1250 1460 1670 2080
100°F 110°F 120°F
38°C 43°C 49°C
0.84 0.69 0.56
0.95 0.79 0.66
1.00 0.82 0.70
1.07 0.91 0.74
1.13 0.95 0.80
1.18 0.99 0.84
1.22 1.03 0.89
3000
3000
2500
17