Grizzly G0638HEP Manual page 71

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 71. 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 Pipe (0.037) at 20'
Branch Line
4" Rigid Pipe (0.075) at 10'
4" Flex Pipe (0.28) at 5' ........................
Elbows/Branches
6" 45˚ Y-Branch ................................
4" 45˚ Elbow ........................................
Additional Factors
Seasoned Filter ................................
Total Static Pressure Loss ................
Figure 72. 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.
Model G0637/G0638 (Mfd. Since 04/12)
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 74 or
G0440 MACHINE
75 for your dust collector on Page 42.
Example: A typical Data Sheet Performance
DATA SHEET
Curve is illustrated in Figure 73. Find 4.4 on
the Static Pressure axis (the amount of total
static pressure loss calculated in Figure 72),
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 73. 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
is above the requirement of the machine
Restrictor Plate 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 44 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.
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
-41-
©2005 BY GRIZZLY INDUSTRIAL
12.0 13.0
Impeller
14-1/2"
10.0
338
®