Dri-Air Industries HA750B Manuale operativo - Pagina 4
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DRI-AIR
The HA750-1500 Hot Air dryer series is ideal for drying non-
hygroscopic resins such as polypropylene and polyethylene.
The moisture associated with these resins resides on the
surface of the pellets. The surface moisture on these resins is
easily removed by a flow of hot air.
Resins such as polycarbonates, ABS, and Nylons are
hygroscopic, absorbing moisture into the pellet. These resins
require a dryer equipped to desiccate the air stream and may
not be suitable for a Hot Air dryer.
Air Flow
The airflow of the HA series dryers is circulated through a
heater cabinet containing up to 9 tubular heaters and the
material hopper by a fan type blower specified below.
HA750
HA1000
HA1500
The HA series dryers are compatible with many types of
material hoppers. The hopper must be designed to allow
good material flow and should be equipped with a diffuser
basket so that air flow through the hopper is not impeded. To
ensure proper air flow, we strongly recommend that you use a
Dri-Air hopper described below.
Hopper Design
These dryers are designed to be used with our large capacity
1000, 1500, and 2000 lb. hoppers. 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 undried 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.
Dryer Controls
The HA series dryers are supplied with a digital temperature
controller that allows the operator to easily monitor dryer
performance and input operational settings. The controller is
factory set and requires no additional programming.
The controller is used in conjunction with a 6 inch long 0.125"
OPERATING MANUAL - HA750-1500B HOT AIR DRYERS
Revision 10/8/02
INDUSTRIES, INC.
750 cfm Blower
1000 cfm Blower
1500 cfm Blower