Page 242 - Flipbook_SolidDesignSoutheast2020

Acrison ®

Bulk Bag Unloader

Model 821

For Dry Solid Materials

Acrison’s Model 821 Bulk Bag Unloader The Model 821 Bulk Bag Unloader is resiliently mounted onto a
provides a safe, dust-tight, and highly ruggedly constructed, heavy-duty tubular structure designed for
floor mounting. A Bag Lifting Rack attaches to the lifting straps (or
effective means for discharging a wide loops) of a bulk bag to lift the bag into the unloader. From floor
assortment of dry solid materials from level, bulk bags are lifted and placed into the unloader by a fork
truck, by a hoist and trolley system incorporated into the unloader’s
within various size bulk bags. support structure, or by a separate overhead hoist.

Once a bulk bag has been placed into the unloader, the bag is
Operation primarily supported by the unloader, and to some extent, by the
Bag Lifting Rack. As an option, the Bag Lifting Rack may include
Positive product discharge is reliably achieved by means of regulated Acrison’s Automatic Bag Tensioner to maintain upward lift on the
vibration uniformly applied to the body of the Model 821 Unloader, bag as it empties, facilitating the emptying process. The Bag Lift-
and in turn, to the bulk bag. The vibratory action is produced by ing Rack may also include Acrison’s optional Bag Liner Tensioner.
an adjustable, heavy-duty motorized vibrator, powered by a TENV
(AC) motor.
When a bulk bag is placed into the unloader, the bag ‘sits’ completely
on its shallow body. When energized, powerful flow-inducing
vibratory forces transfer from the body of the unloader into the
bag and the material contained within, effectively and efficiently
discharging its contents. Beneath the unloader, an independently
mounted Iris Valve, with Acrison’s Bag Spout Untie Receptacle
attached, flexibly connects to the outlet of the unloader. The
Untie Receptacle includes a hinged and clamped entry door; its
outlet connects to mating process equipment for a totally dust-
tight assembly.
After a bulk bag has been placed into the unloader, and with the
Iris Valve open fully, open the door of the Untie Receptacle and
reach upwards through the Iris Valve to access the bag spout. Then
pull the spout down through the Iris Valve and into the Untie
Receptacle until the bag spout cannot be pulled downward any
further. Do not untie the bag spout string at this time.
Once done, close the Iris Valve, which will seal off the bag spout,
and then untie the string that maintains the bag spout sealed.
Close the hatch of the Untie Receptacle and when ready to discharge
material, open the Iris Valve.
NOTE: The Iris Valve is not intended to close off the flow (discharge)
of material from within a bulk bag by sealing off the bag spout when
the spout is full with material. Please reference Acrison’s Model 820
Bulk Bag Unloader, which is designed to close off the bag spout and
remove a partially empty bag.

Basic Model 821 Bulk Bag Unloader.

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