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The Shand & Jurs Model 94321 Air Dryer absorbs moisture from
the air that is drawn into a storage tank during the unloading of product or by
“thermal breathing” conditions. Desiccant of high absorptive capacity is used as
the drying agent. The hard ball shaped form of the desiccant minimizes the
pressure drop, permitting more efficiency. This is a function of material
surface area and retention time. The nature of the desiccant does not change
the flow of gas up to the point of maximum saturation since the moisture is
absorbed within the pores of the material. The desiccant is contained in a
perforated stainless steel basket that can be easily removed for cleaning or
maintenance.
Model 94321 Air Dryer is 40 inches high and both the cover and
basket can be removed through the use of 3/8" bolts. The desiccant basket
holds 50 pounds on the 2" size and 200 pounds on the 3" size; this is the
recommended amount required to properly operate the air dryer. The air dryer
is available in 2" or 3" NPT or flanged to match 150Ib. ANSI connections.
Nominal flow for 1" W.C. pressure drop is 840 SCFH for the 2" size and 3500
SCFH for the 3" size.
The humidity indicator is a good barometer to monitor
when the desiccant bed is saturated. To reactivate a saturated desiccant bed,
heat the bed to 400°F until all moisture is vaporized. The desiccant can be
subjected to thousands of absorption-reactivation cycles without any appreciable
loss of efficiency.
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