Grizzly G0777 Owner's Manual page 36

3.
Add the additional factors from the following
table to your list.
Additional Factors
Seasoned (well used)
Dust Collection Filter
Customer Service #: (570) 546-9663 • To Order Call: (800) 523-4777 • Fax #: (800) 438-5901
Entry Loss at Large
Machine Hood
Figure 51. Additional factors affecting static
2 HP TWO-STAGE CYCLONE DUST COLLECTOR
pressure.
4.
Total your list as shown in the example below
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
6" Rigid Duct (0.037) at 20'
Branch Line
4" Rigid Duct (0.075) at 10'
4" Flexible Duct (0.28) at 5'
Elbows/Branches
6" 45˚ Y-Branch ................................
4" 45˚ Elbow ........................................
Additional Factors
Seasoned Filter ................................
Total Static Pressure Loss ................
Figure 52. Totaling static pressure numbers.
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.
-34-
Static Pressure
1"
2"
MODEL G0440
................ 0.740
................ 0.750
................ 1.400
0.329
0.225
1.000
4.444
Specifications, while deemed accurate, are not guaranteed. 2/2005.
5. Compare the total static pressure loss for that
line to the closest CFM given in Figure 53 for
G0440 MACHINE
your dust collector.
Example: A typical Data Sheet Performance
DATA SHEET
Curve is illustrated in Figure 53. Find 4.4 on
the Static Pressure axis (the amount of total
static pressure loss calculated in Figures 54
& 55), then refer to the closest value on the
CFM axis—approximately 1120 CFM.
The 1120 CFM for the static pressure loss of
the line connected to the router is well above
the 220 CFM requirement of that machine.
Performance Curve
2500
2250
2000
1750
1354
1500
1250
1000
750
4.4 SP
500
Loss
250
0
0.0 1.0 2.0 3.0 4.0
CFM STATIC PRESSURE (Inch/H2O)
Figure 53. CFM for static pressure loss of line
2 HP GRIZZLY DUST COLLECTOR PERFORMANCE RESULTS
connected to a dust collector & router.
Max CFM Max SP HP
1354 10.4 2 HP
— If the CFM for your static pressure loss
Restrictor Plate is above the requirement of the machine Dia. 7"
(inch)
connected to the end of that branch line,
Static Pressure 2.5
then dust collection will most likely be
(Inch/H2O)
successful. Congratulations! You've just
CFM 1354
designed your own dust system. Refer to
The airflow test probe is located 1.5x duct diameter upstream from the
the Accessories section on Page 40 to
air inlet. Test pipe length is a minimum of 10x duct diameter.
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 G0777/G0777HEP (Mfd. Since 04/19)
Closest
CFM
(1120)
5.0 6.0 7.0 8.0 9.0 10.0 11.0
Volts Inlet
220V 7"
Dia. Dia. Dia. 4" Dia. 3" Dia.2"
6" 5"
3.2 5.1 7.8 9.2
1266 1070 829 586
©2005 BY GRIZZLY INDUSTRIAL
12.0 13.0
Impeller
14-1/2"
10.0
338
®