Grizzly G0671 Owner's Manual page 34

4.
total your list, as shown in the example in
figure 38, to come up with your overall static
pressure loss number for that line.
Note: Always account for a seasoned filter,
so you don't end up with a system that only
works right when the filter is clean.
Main Line
Branch Line
Elbows/Branches
Additional Factors
Total Static Pressure Loss ................
figure 38. example list for totaling sp loss.
Note: When calculating static pressure loss to
determine if multiple lines can be left open at the
same time, only include the main line numbers
once.
5.
Compare the total static pressure loss for
that line to the closest CFM given in the
performance Curve section on the Machine
Data Sheet (located toward the front of this-
manual).
Example: go to the Model g0671 data sheet
Performance Curve section (see page 4) or
see figure 39 and find 4.4 on the pressure
axis, then go up the CFM axis to the closest
value—approximately 3550 CFM, as shown
in figure 39.
the 3550 CFM (figure 39) for the static pres-
sure loss of the line connected to the router is
well above the 220 CFM requirement of that
machine.
-32-
Closest
CFM
figure 39. CFM for static pressure loss of line
4 HP DUST COLLECTOR PERFORMANCE RESULTS
connected to g0671 dust collector & router.
Max CFM
4.444
—if the CFM for your static pressure loss
Inlet Dia. (inch)
is above the requirement of the machine
CFM
connected to the end of that branch line,
Static Pressure
then dust collection will most likely be
(Inch/H2O)
Amps
successful. Congratulations! you've just
Air Speed (m/s)
designed your own dust system. refer to
the accessories section on page 35 to
start buying the components necessary to
make your system a reality.
—if the CFM for your static pressure loss is
below the requirement of the machine, then
that line will not effectively collect the dust.
you must then modify some of the factors
in that line to reduce the static pressure
loss. some of the ways to do this include:
1) installing larger duct, 2) reducing amount
of flexible duct used, 3) increasing machine
dust port size, 4) moving machine closer to
dust collector to eliminate duct length, and
5) reducing 90˚ elbows or replacing them
Model G0671
with 45˚ elbows
4 HP DUST COLLE
Performance Curve
CFM
(3550)
4.4 sp loss
STATIC PRESSURE (Inch/H2O)
Max SP HP Volts
g0671/g0672/g0673 dust Collector
MODEL G067
Inlet Impeller