AEC OS Series Gravimetric Batch Blenders - Manual (Page 19)

Page 18 of 118
1-12-4 Weigh Hopper
The weigh hopper on the OS/OA blender is used to weigh each batch
of material, and includes an air-operated discharge valve. After the
batch is weighed and the level sensor in the lower mix section is
uncovered, the valve will open and discharge the batch into the mixer
with the existing blended material. The discharge valve is also
provided with a quick disconnect so the weigh hopper can be removed
for cleaning.
On an OS blender, the weigh hopper rests on each side on a precision
cantilever load cell. To remove the weigh hopper, lift the hopper from
the bottom, hold the discharge valve closed, and slide it out once clear
of the locating tab on the bracket above the load cell.
Once the hopper has been cleaned, reposition it onto the load cell
brackets, using care not to damage the load cells. Position the hopper
as close to the center position between the load cells as possible.
Important! Use care when replacing the weigh hopper, since the load cells are
delicate weighing instruments and can be easily damaged. Do not
use force to push in the weigh hopper. If it is positioned properly,
it will slide in very easily.
Load cells, if damaged, will have to be sent back to the
manufacturer for testing and evaluation.
DISCHARGE VALVE
LOAD CELL LOAD CELL
WEIGH HOPPER
LOCATING TABS
AIR CYLINDER
The OA-HC style weigh hopper is bolted in place, and is generally not
removed.