Sterling STT 160 - Manual (Page 34)

6.1. Ge ne ral In for ma ti on
The de hu mi di fied air dry ers were de ve lo ped for dry ing plas tic gra nu les. Due to their com pact con -
struc ti on, they can be em ploy ed next to the pro ces sing ma chi ne (dry ing hop per on the pro ces sing
ma chi ne) or with one or more dry ing hop pers as a mo va ble fa ci li ty (com pact fa ci li ty).
The dry ers work ac cor ding to the de hu mi di fied air prin ci ple, i.e., the air is not only hea ted but also
de hu mi di fied be fo re it flows through the dry ing hop per.
In this man ner, plas tic gra nu les can be dried down to a very small re si du al moi stu re con tent.
The dry ing tem per a ture can be ad justed, if nec es sary, up to a max i mum of +180 °C (356°F) (up -
per limit). Due to the heat that is re leased dur ing wa ter ab sorp tion in the dry ing cells, the lower
limit of the de hu mid i fied air tem per a ture is approx. +60 °C (140°F).
The dry ing ta kes pla ce con ti nu ous ly, i.e., the re are no rest pe ri ods due to re ge ne ra ti on of the dry -
ing agent.
F The dry er is ra ted for con ti nu ous ope ra ti on.
The dry er may only be put into ope ra ti on if the dry ing hop per is fil led.
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STT 110 / STT 160
Functio nal des crip ti on 6-2