Grizzly T28798, Owner'S Manual

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Model T28798 (Mfd. Since 12/18)
-17-
There are a number of options when it comes to
metal duct, but duct that is specially manufactured
for metal dust collection is the best choice. When
selecting your metal duct, choose high-quality
metal duct with smooth-welded internal seams
that will minimize airflow resistance. This type of
duct usually connects to other ducts or elbows
with a simple, self-sealing clamp, is very quick
and easy to assemble, and can be readily disman-
tled and re-installed. This is especially important
if you ever need to change things around in your
shop or add more tools.
Overview
Always guard against stat-
ic electrical build up by
grounding all collection
lines.
This dust collector is designed exclusively to col-
lect dry metal, chips, and swarf.
DO NOT use this
dust collector to collect wood dust or metal chips
containing cutting fluid or coolant. Due to fire or
explosion risk,
DO NOT use this machine to col-
lect combustible or explosive metals, magnesium,
niobium, tantalum, titanium, zirconium, hafnium,
combustible liquids or fuels, gasoline, or oil- or
solvent-based paints.
For best performance, place this dust collector
as close to dust-generating machines as possible
and install blast gates at the beginning of ducting
lines. Only open one line at a time to focus maxi-
mum suction at the machine where dust is being
collected.
Grizzly offers a complete line of dust collection
accessories for setting up your dust collection
system ductwork (see
Page 21) and a complete
guide book titled Dust Collection Basics.
Whatever system design you choose, always
make sure to position ducting and collector away
from any open flames (including pilot lights);
otherwise you risk an explosion if material is dis-
persed into the air.
Duct Material
For best results, use only smooth-wall, sheet-
metal ducting or flexible metal ducting to connect
each machine.
The National Fire Protection Agency (NFPA)
warns of explosion or fire hazard because of static
electrical buildup if plastic or non-conductive duct
material is used for metal dust collection and is
not completely grounded and bonded. We
DO
NOT recommend using any plastic duct material
with this machine.
Metal Ducting
Figure 11. Examples of metal duct and
components.
Advantages of metal ducting is its conductivity
and that it does not contribute to static electrical
charge build-up. However, static charges are still
produced when particles strike other dust par-
ticles as they move through the duct. Since metal
duct is a conductor, it can be grounded quite
easily to dissipate any static electrical charges.
Replace any plastic dust ports with sheet-metal
equivalents, or bond sheet metal ducting to metal
frame of machine with grounding wire.
Avoid inferior metal duct that requires you to cut it
to length and snap it together. This type of duct is
time-consuming to install because it requires you
to seal all the seams with silicone and screw the
components on the ends with sheet-metal screws.
Another disadvantage is the rough internal seams
and crimped ends that unavoidably increase static
pressure loss.
Ducting System