AEC VacTrac Series Conveying Systems - Manual (Page 64)

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Secure the flex hose at the probe and the material inlet with hose clamps. Be sure to
avoid loops and kinks, and install grounding wire around the outside of flex hose to
prevent static built-up. Make sure you ground both ends of the grounding wire.
Put the pickup probe in the material supply. The burrowing action of the probe
provides a steady flow of material.
To vary the convey rate, cover or open the vent holes on the pickup probe as needed
with the inlet tube.
If your material bridges frequently and triggers No-Convey alarm conditions, you
should consider using a gaylord tilter or tilter/jogger to supply a steady stream of
material to your conveying system.
Container tilters are recommended for complete cleanout of gaylords.
Installing the Grinder Take-off Attachment
A grinder take-off attachment (See Figure 21 on page 44 for an example) is typically
mounted horizontally through the side of a grinder or granulator bin or any other straight
sided supply bin.
1. The take-off attachment is mounted through a hole cut close to the bottom of the bin
to allow emptying as much material as possible.
2. Cut a hole smaller than the mounting plate.
3. Mount the take-off attachment with the mitered air inlet tube on top, and the straight
material outlet on the bottom.
4. Mark and drill holes to match the mounting plate holes. Fasten tightly with sheet
metal screws, bolts, or rivets.
5. Secure the mounting hardware with a removable thread locking adhesive, cotter pins,
aircraft fasteners, etc. to prevent the hardware from vibrating loose and being
conveyed into the processing machine.
6. You should attach grounded flex hose to the material outlet and the vacuum receiver
with hose clamps. The other tube is the air inlet to supply make-up air to the bin.
Avoid loops or kinks in the flex hose.
Installing and Adjusting the Take-off Compartment
Take-off compartments (TOCs) are installed under surge bins, silos, or other storage devices.
TOCs are available in a single position complete cleanout style with a V-shaped bottom or a
box type with one or more material takeoff positions (See Figure 22 on page 44 for an
example.).
You can have several different size tubes for several different sized pump packages
conveying a material from a central supply to several destinations.
Take-off compartments are typically pre-drilled for mounting and their outlets are sized to fit
the pump package, material, and distance specified at the time of purchase. To optimize the
use of your take-off compartment, provide for the following:
Make sure that a three-foot (1 m) horizontal run is present prior to installing elbows.
Conveying System Mechanical Components Chapter 3: Installation 63 of 136