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3.0 Maintenance
3.1 Condenser coil—
Clean off accumulated dust and dirt monthly.
3.2 Moisture separator—
Replace filter element when pressure drop across
dryer is excessive or annually.
3.3 Check separator daily to be sure automatic drain is
discharging.
3.4 Replace drain mechanism annually.
To facilitate service, maintenance kits are available.
Element o-ring
Bowl o-ring
Tube
6
Rated capacity of
air-cooled models (scfm)
Separator Element
Wave Spring
Drain Mechanism
Hose
Barb
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 125
handle when compressed air to be dried is at 80 psig and
90°F; ambient air temperature is 80°F; and a 35°F dew
point temperature is desired?
Answer: 125 x 1.17 x 1.12 x 1.0 = 163.8 scfm.
TABLE 1
Rated capacity (scfm) and pressure drop @ 100 psig inlet
pressure, 100°F inlet temperature, and 100°F ambient
temperature
MODEL
60 Hz
50 Hz
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
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 35°C, 95°F.
25
35
50
75
100
25
35
50
75
100
21
29
42
63
84
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
OUTLET DEWPOINT
DEW POINT
TEMPERATURE
MULTIPLIER
°
°
F
C
38
3
40
4
45
7
50
10
125
150
125
150
105
125
°
120
F
°
49
C
0.56
0.66
0.70
0.74
0.80
0.84
0.89
1.0
1.1
1.2
1.3
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