Sizing - Gardner Denver RNC Series Instruction Manual

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)
10
100 125 150 200
100 125 150 200
84 105 125 170
300 400 500 600
300 400 500 600
250 340 420 540
TABlE 2
Air capacity correction factors (Multipliers)
INLET
PRESSURES
psig kgf/cm
50 3.5
80 5.6
100 7.0
125 8.8
150 10.5
175 12.3
200 14.0
COOLING MEDIUM*
AMBIENT
250
TEMPERATURE
250
210
°F °C
80 27
90 32
750
100 38
750
110 43
630
*Air-cooled models; water-cooled models use 1.15 multiplier if cooling water
is below 35°C, 95°F.
INLET COMPRESSED AIR CONDITIONS
INLET TEMPERATURES
80°F 90°F 100°F
27°C 32°C 38°C
2
1.35 1.05 0.84
1.50 1.17 0.95
1.55 1.23
1.00
1.63 1.31 1.07
1.70 1.37 1.13
1.75 1.42 1.18
1.80 1.47 1.22
MULTIPLIER
1.12
1.06
1.00
0.94
110°F 120°F
43°C 49°C
0.69 0.56
0.79 0.66
0.82 0.70
0.91 0.74
0.95 0.80
0.99 0.84
1.03 0.89