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HM DRYERS
FEATURES:
The HM series dryers are a fully assembled dryer and hopper combination where the dryer is
mounted on the hopper to be positioned on top of molding machines. They are ideal where floor
space is not available and material changes are infrequent. The HM dryer series utilize the
ARID-X dual bed design that provides a constant supply of dry air to the material hopper.
Arid-X Two Bed Design
While one bed is removing moisture from the process air the other is regenerating by heating
the desiccant to a high temperature. Once the regenerated bed cools down, the Zone Valve
switches the airflow, and the newly regenerated bed is used to desiccate the process air stream.
The saturated bed is now regenerated in the same manner, completing the regeneration cycle
The airflow design of the ARID-X dryers makes the regeneration cycle more efficient because
we utilize a small amount of the desiccated process air rather than ambient air to regenerate the
desiccant bed. This reduces the impact of the high moisture content of the ambient air, which
would contaminate the desiccant bed, and allows the dryer to attain a lower dew point. Please
see the Air Flow Schematic on Page 4.
Dryer process operating temperatures are 140 degrees F (minimum) to 325 degrees F
(maximum) with an accuracy of +/- 3 degrees. When the drying temperature is 275 degrees F
or higher, it is necessary to install a water-cooled heat exchanger on the return hose of the dryer
to ensure maximum dryer efficiency. If you do not have a heat exchanger and will be operating
275 degrees F or higher, please contact the factory for heat exchanger pricing.
Hopper Design
Dri-Air’s “all stainless” hopper design utilizes a stainless-steel inner shell surrounded by a
stainless-steel jacketed insulation layer. The easily removable stainless steel spreader cone
promotes proper material flow to ensure that the material is dried efficiently and no dried
material is left at the hopper bottom that needs to be fed out prior to operating. You must ensure
that your hopper is adequately sized for your usage rate and is kept filled, to ensure that you
have sufficient time to dry the material.
