|
Sizing TABLE 1 - Correction Factors (multipliers) for Inlet Air Temperature
and Pressure
|
Inlet Pressure (psig)
|
80°F (27°C)
|
90°F (32°C)
|
100°F (38°C)
|
110°F (43°C)
|
120°F (49°C)
|
|
50
|
1.35
|
1.05
|
0.84
|
0.69
|
0.56
|
|
80
|
1.50
|
1.17
|
0.95
|
0.79
|
0.66
|
|
100
|
1.55
|
1.23
|
1.00
|
0.82
|
0.70
|
|
125
|
1.63
|
1.31
|
1.07
|
0.91
|
0.74
|
|
150
|
1.70
|
1.37
|
1.13
|
0.95
|
0.80
|
|
175
|
1.75
|
1.42
|
1.18
|
0.99
|
0.84
|
|
200
|
1.80
|
1.47
|
1.22
|
1.03
|
0.89
|
TABLE 2 - Correction Factors for Ambient Temperature*
|
Ambient Temperature
|
80°F (27°C)
|
90°F (32°C)
|
100°F (38°C)
|
110°F (43°C)
|
|
Multiplier
|
1.12
|
1.06
|
1.00
|
0.94
|
TABLE 3 - Correction Factors for Dew Point Temperature
|
Dew Point Temperature
|
38°F (3°C)
|
40°F (4°C)
|
45°F (7°C)
|
50°F (10°C)
|
|
Multiplier
|
1.0
|
1.1
|
1.2
|
1.3
|
*Air-cooled models only. For water-cooled use a 1.15
multiplier if cooling water is less than 95°F (35°C).
To adjust dryer capacity for conditions other than
rated, use Correction Factors (multipliers) from Tables 1, 2, and 3.
Example: What is the capacity of a model PRD 100 when the compressed air
at the inlet to the dryer is at 150 psig and 100°F (38°C), the ambient
temperature is 90°F (32°C) and a 50°F (10°C) dew point is desired?
Answer: 100 scfm (rated flow from Specifications Table) x 1.13
(correction factor for inlet temperature and pressure from table 1) x
1.06 (correction factor for ambient temperature from table 2) x 1.3
(correction factor for dew point from table 3)=156 scfm.
|
