Deltech PYRAMID Series Instruction Manual page 8

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
Bowl O-Ring
PTC Swivel Elbow
Models 200-750
8
Head
Element O-Ring
Wave Spring
Element
Float Drain
Drain Line
Head
Element O-Ring
Bowl O-Ring
Element
Bowl
Bowl Support
*Models 500-750 Only.
Drain Quick Disconnect
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.
TABLE 1
Rated capacity (scfm) and pressure drop @ 100 psig inlet
pressure, 100°F inlet temperature, and 100°F ambient
temperature
MODEL
Rated capacity 60 Hz
of air-cooled 50 Hz
models (scfm)
MODEL
Rated capacity 60 Hz
of air-cooled 50 Hz
models (scfm)
TABLE 2
Air capacity correction factors (Multipliers)
INLET COMPRESSED AIR CONDITIONS
INLET
PRESSURES 80°F
2
psig kgf/cm 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.
100 125 150 200
100 125 150 200
84 105 125 170
300 400 500 600
300 400 500 600
250 340 420 540
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
250
250
210
750
750
630
120°F
49°C
0.56
0.66
0.70
0.74
0.80
0.84
0.89