Grizzly G0671 - Manual (Page 34)

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Model G0671/G0672/G0673 (Mfg. Since 1/13
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 35 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 35.
the 3550 CFM ( figure 35) for the static pres-
sure loss of the line connected to the router is
well above the 220 CFM requirement of that
machine.
figure 34. example list for totaling sp loss.
Main Line
6" Rigid Pipe (0.037) at 20' ................ 0.740
Branch Line
4" Rigid Pipe (0.075) at 10' ................ 0.750
4" Flex Pipe (0.28) at 5' ........................ 1.400
Elbows/Branches
6" 45˚ Y-Branch ................................ 0.329
4" 45˚ Elbow ........................................ 0.225
Additional Factors
Seasoned Filter ................................ 1.000
Total Static Pressure Loss ................ 4.444
—if the CFM for your static pressure loss
is above the requirement of the machine
connected to the end of that branch line,
then dust collection will most likely be
successful. Congratulations! you've just
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
with 45˚ elbows
model G0671
4 HP dUST ColleCToR
Customer Service #: (570) 546-9663 • To Order Call: (800) 523-4777 • Fax #: (800) 438-5901
mACHINe dATA
SHeeT
101 1 /
8
"
73 7 /
8
"
Ш10"
31 3 /
8
"
47 5 /
8
"
47 1 /
4
"
47 1 /
4
"
Ш23 5 /
8
"
Ш23 5 /
8
"
6 5 /
8
"
101 1 /
8
"
73 7 /
8
"
Ш10"
31 3 /
8
"
47 5 /
8
"
47 1 /
4
"
47 1 /
4
"
Ш23 5 /
8
"
Ш23 5 /
8
"
6 5 /
8
"
Test run using 30 micron upper and lower bag
4 HP DUST COLLECTOR PERFORMANCE RESULTS
Max CFM Max SP
HP Volts Inlet Impeller
3551.6 13.5 4 HP 220V 10" 14 1 /
2
"
Inlet Dia. (inch) 10" 9" 8" 7" 6" 5" 4" 3" 2"
CFM 3551.6 3454.8 3282.6 2916.6 2475.4 2098.7 1452.9 979.4 484.3
Static Pressure
(Inch/H2O)
4.72 4.82 6.98 8.5 10.3 11.1 12.53 13.2 13.5
Amps 30 29.5 27.5 24 21 16.8 12.5 11 8.6
Air Speed (m/s) 33 32.1 30.5 27.1 23 19.5 13.5 9.1 4.5
Performance Curve
4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500
1250
1000
750
500
250
0
0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 CFM
STATIC PRESSURE (Inch/H2O)
Model G0671 Page 3 of 3
figure 35. CFM for static pressure loss of line
connected to g0671 dust collector & router.
4.4 sp loss
Closest
CFM
(3550)
4. total your list, as shown in the example in
figure 34, 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.