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Conveying System Mechanical Components Chapter 3: Installation 60 of 138
Installing the Grinder Take-off Attachment
A grinder take-off attachment (See Figure 17 on page 41 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 18 on page 41 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.
• Install the TOC so the outlet tubes can head out unobstructed in the direction of the
material destination.
• Use long radius bends on TOC outlets.
• Provide access for removing and cleaning TOC inlet air filters.
• Provide access for cleanout doors on TOCs.
Most TOCs have adjustable material inlet tubes to fine-tune the material to air ratio for
optimal conveying rates. To adjust:
1. Loosen the set screw on the adjusting dial and turn the tube clockwise one third of
the way from the 0 (zero) mark.
2. Turn ON the conveying system and start loading from the takeoff.