INSTALLATION, START-UP & MAINTENANCE MANUAL
MODEL NO.: SD-220 TO SD-600- DDS OPTION
REV 0 – May 24,,.2001
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SECTION 5
5.2 CORRECTION FACTOR FOR INLET TEMPERATURE (Continued)
Example: To size for an inlet flow of 950 SCFM @ 105 F and 110 Psig.
1. Select models that produce at least 950 SCFM at 110 Psig. This case would
be the SD-1050 which can dry 1215 SCFM.
2. Multiply pressure corrected flow by the temperature correction factor to obtain
the flow of the dryer corrected for pressure and temperature:
1140 X (0.85) = 1008 SCFM
3. Confirm model selection. Model SD-1050 can flow 1008 SCFM at the inlet
conditions specified. The requirements of 950 SCFM is less, so model SD-
1050 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, 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.
MODEL
SD-220 SD-300 SD-400 SD-500 SD-600
P1 P2 P2 P2 P2 P2
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
P1 = Dryer inlet pressure (PSIG)
P2 = Dryer purge pressure (PSIG) based on dryer inlet temperature (100°F)
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