INSTALLATION, START-UP & MAINTENANCE MANUAL
SD-220 TO SD-600
REV 04 – 10 Oct 2003
Page 23 of 32
5.2 CORRECTION FACTOR FOR INLET TEMPERATURE (Continued)
Example: To size for an inlet flow of 570 SCFM @ 105 F and 110 Psig.
1 Select a model that produces at least 570 SCFM at 110 psig. This case would be
the SD-600 which can dry 700 SCFM.
2 Multiply pressure corrected flow by the temperature correction factor to obtain the
flow of the dryer corrected for pressure and temperature: 700 X (0.83) = 580 SCFM
3 Confirm model selection. Model SD-600 can flow 580 SCFM at the inlet conditions
specified. The requirements of 570 SCFM is less, so model SD-600 is correct.
5.3. PURGE ADJUSTMENT
To adjust the purge pressure, the following steps are to be followed, refer to the flow
schematics at the end of this manual:
1 The power is turned on and the dryer is operating.
2 When either chamber is depressurized and being regenerated, adjust the pressure
on the pressure gauge using the purge adjusting valve supplied.
3 Refer to below table to adjust purge based on operating / inlet pressure.
Dryer Inlet Dryer Purge Pressure (psig)
Pressure
(Based upon 100
o
F inlet air temperature)
(psig) SD-220 SD-300 SD-400 SD-500 SD-600
80 80 80 80 80 CF
90 88 85 86 84 86
100 90 90 91 89 88
110 95 93 92 91 94
120 97 95 94 92 96
NOTE: CF = CONSULT FACTORY
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