23
Donaldson Company, Inc.
Ductwork
If collector is operated with more
than the maximum permissible
inlet size, the fan motor can overload or dust
can settle in the duct due to low air velocity.
1. Inlet collars can be located on the side, top, or back
of the cabinet by removing the desired inlet cover
plate and installing the inlet collar using the same
screws.
2. Use the shortest possible inlet duct. Avoid the use
of tees or flexible, wire-molded duct except where
machine motion or vibration needs to be isolated.
Flexible duct has a high static pressure and reduces
airflow.
3. Size duct for the recommended air velocity of the
conveyed material or material may collect inside the
duct.
4. Connect joints with sheet metal screws, rivets, or
sealer. Finish each joint with sealer or duct tape.
Note: Sheet metal screws may cause fibrous
or stringing particulate to accumulate
inside duct. Use rivets or sealant in these
conditions.
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