8
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 400 handle
when compressed air to be dried is at 200 psig and 100°F;
ambient air temperature is 80°F?
Answer: 400 x 1.22 x 1.12
= 547 scfm.
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 Blow down separator weekly by pushing test button
on control panel.
3.5 Rebuild drain mechanism annually.
To facilitate service, maintenance kits are available.
Models 100-150
Drain Line
PTC Swivel Elbow
Element
Wave Spring
Float Drain
Element O-Ring
Bowl O-Ring
Head
Models 200-750
Head
Element O-Ring
Bowl O-Ring
Element
Bowl
Drain Quick Disconnect
Bowl Support
*Models 500-750 Only.
INLET COMPRESSED AIR CONDITIONS
INLET
INLET TEMPERATURES
PRESSURES
80°F
90°F
100°F
110°F
120°F
psig
kgf/cm
2
27°C
32°C
38°C
43°C
49°C
50
3.5
1.35
1.05
0.84
0.69
0.56
80
5.6
1.50
1.17
0.95
0.79
0.66
100
7.0
1.55
1.23
1.00
0.82
0.70
125
8.8
1.63
1.31
1.07
0.91
0.74
150
10.5
1.70
1.37
1.13
0.95
0.80
175
12.3
1.75
1.42
1.18
0.99
0.84
200
14.0
1.80
1.47
1.22
1.03
0.89
TABLE 2
Air capacity correction factors (Multipliers)
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.
TABLE 1
Rated capacity (scfm) and pressure drop @ 100 psig inlet
pressure, 100°F inlet temperature, and 100°F ambient
temperature
MODEL
100
125
150
200
250
Rated capacity
60 Hz
100
125
150
200
250
of air-cooled
50 Hz
84
105
125
170
210
models (scfm)
MODEL
300
400
500
600
750
Rated capacity
60 Hz
300
400
500
600
750
of air-cooled
50 Hz
250
340
420
540
630
models (scfm)
Summary of Contents for HPRplus Series
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