Section 4: Designing The System; General; Duct Material - Grizzly G0671 Owner's Manual

SECTiON 4: DESiGNiNG ThE

General

the Model g0671/g0672/g0673 can be operated
as either a stationary or mobile unit. there are
advantages and disadvantages to both set-ups.
the advantage of the mobile system is eliminating
the cost of many ducts and fittings. on the other
hand, the stationary system is more versatile and
convenient.
the Model g0671/g0672/g0673 is designed to
be a central dust collector system. locate the dust
collector in an out of the way location such as a
corner or separate room. these machines can
accomodate the following number of machines
each drawing 400 CFM on a 4" dust port:
G0671: ............................................................... 8
G0672: ............................................................... 9
G0673: ............................................................. 12
the large suction capacity of the Model g0671/
g0672/g0673 allows great flexibility in planning
and designing of your dust collection duct layout.
grizzly offers a complete line of dust collection
accessories for setting up a stationary system.
Additionally, grizzly offers a complete guide book
titled Dust Collection Basics.
A 4-port inlet is included with the Model g0671/
g0672 and a 5-port inlet is included with the
Model g0673 for quick and economical dust col-
lection setup. however, depending upon your
system design using this feature, bags may fill at
different rates requiring you to empty some bags
more often than others.
Whatever system you choose, always make sure
there are no open flames (including pilot lights) in
the same room as the dust collector; otherwise
you risk an explosion if dust is dispersed into the
air.
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SySTEM
you have many choices regarding main line and
branch line duct material. For best results, use
metal duct for the main line and branch lines, then
use short lengths of flexible hose to connect each
machine to the branch lines.
plastic duct is also a popular material for home
shops. however, be aware that there is a fire or
explosion hazard if plastic duct material is used
for dust collection without being grounded against
static electrical charge build-up. this topic will be
discussed later in this section. Another problem
with using plastic is that it is less efficient per foot
than metal.
Metal Duct
Advantages of metal duct (figure 24) is its
conductivity and that it does not contribute to
static electrical charge build-up. however, static
charges are still produced when dust particles
strike other dust particles as they move through
the duct. since metal duct is a conductor, it can
be grounded quite easily to dissipate any static
electrical charges.
figure 24. examples of metal pipe and

Duct Material

components.
g0671/g0672/g0673 dust Collector