Altec AIR MHR Series, Manual

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APPLYING YOUR AIR DRYER
TO ACHIEVE THE BEST DRYER PERFORMANCE, YOU SHOULD CAREFULLY CHECK THAT
THE DESIGN AND INSTALLATION REQUIREMENTS OUTLINED BELOW ARE SATISFIED.
(1) Standard operating pressure of your ALTEC AIR Dryer can range from 75 minimum to 150
maximum PSIG. Check dryer label to verify maximum service pressure. Air available for your air
usage will vary with operating pressure.
(2) The dryer should not be installed where compressed air and/or ambient temperature exceeds
120°F or drops below 32°F. Locate dryer to avoid extremes of heat and cold from other condi-
tions. Best results occur when dryer is located as close to point of use as practical. Where applica-
ble, dryer towers should be insulated to reduce heat loss. Avoid locating dryer outside or where it
is exposed to the elements.
Altec AIR dryers are sized according to air flow not pipe size. The dryer requires 10% to 15% of inlet
airflow (SCFM) for regeneration. The difference between the inlet and outlet flow is the amount of
purge air required. This air is purged to atmosphere and is not available for use downstream. certain
air supply to dryer meets your air demand plus purge air requirements.
DRYER SIZING AND CORRECTION FACTORS
SEE DRYER SIZING CORRECTION FACTORS TO PROPERLY SIZE DRYER BASED ON YOUR ACTUAL
OPERERATING CONDITIONS:
1. INLET AIR FLOW
2. INLET AIR PRESSURE
3. INLET AIR TEMPERATURE
OPERATING
% OF
INLET
CAPACITY
PRESSURE
PURGE LOSS
PRESSURE
MULTIPLIER
PSIG PSIG
250 8.40% 250 1.85
200 9.10% 200 1.70
175 9.90% 175 1.55
150 11.20% 150 1.35
140 11.60% 140 1.30
130 12.00% 130 1.25
120 12.70% 120 1.17
110 13.50% 110 1.09
100 14.60% 100 1.00
90 15.90% 90 0.90
80 17.50% 80 0.80
70 19.70% 70 0.70
60 22.50% 60 0.60
INLET CAPACITY
TEMP
MULTIPLIER
DEG. F
120 0.67
110 0.76
100 1.00
90 1.13
80 1.14
EXAMPLE
To calculate the capacity of a MHR100 @ 120 psig and 90 F inlet temperature:
100 scfm (inlet) x 1.17 (pressure) x 1.125 (temperature) = 132 scfm (actual inlet capacity)
Actual Capacity of a MHR100 @ 120 psig and 90F = 132 scfm @ -40F/C Pressure Dew Point*
*Contact Altec AIR or your local distributor for how to adjust your MHR for –100F/-73C Pressure
Dew Point Operation.