Sterlco SDAP 90-225 CFM Series Drying and Conveying Systems - Manual (Page 53)

SDAP Series PD 2 to PD 4 Drying and Conveying Systems Page 53
6-4 Symptoms of Worn Desiccant
The moisture absorption capacity of the desiccant used in your Sterling dryer degrades after an
indefinite period of time. Useful life depends on variables such as material moisture content,
plasticizer vapors in the return air, and number of regeneration cycles.
Your Sterling dryer may need new desiccant if it exhibits any of the following symptoms:
• Plastic material is not being dried sufficiently (high scrap/reject rate).
• Air temperature at the top of the regenerating desiccant bed rapidly climbs to 350°F
(177ºC) or more shortly after the start of regeneration, even though a saturated bed has just
started heating.
• The process air dew point measured with a portable dew point monitor is higher than -10°F
(-23ºC) throughout the process drying cycle.
• Smoke or dust blows out of the process air outlet.
• Noticeable amounts of desiccant in the beds is a medium-brown color or darker.
If you notice any of these signs, replace the desiccant in the desiccant beds. Desiccant
replacement kits are available from the Sterling Parts Department. If you want, an Sterling
technician can repack desiccant beds at your site.
! WARNING !
Desiccant material causes eye irritation!
Breathing may be harmful and may cause skin irritation!
• Do not get in eyes.
• Avoid prolonged contact with skin.
• Use with adequate ventilation.
• Wash thoroughly after handling.
: FIRST AID :
In case of eye contact,
immediately flush eyes with plenty of water
for at least 15 minutes.
If irritation persists, see a physician.