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3.
Add the additional factors from the following-
table to your list.
additional factors
seasoned (well used)
dust Collection Filter
entry Loss at Large
Machine hood
figure 56. Additional factors affecting static
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 57. 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 g0442/g0601 (Mfg since 3/12)
static pressure
1"
2"
................
0.740
................
0.750
1.400
0.329
0.225
1.000
4.444
5.
Compare the total static pressure loss for that
line to the closest CFM given in figure 58.
example: the g0442/g0601 data sheet
performance curve is illustrated in figure
58. Find 4.6 on the static pressure axis (the
amount of total static pressure loss calcu-
lated in figure 57), then refer to the closest
value on the CFM axis—approximately 1953
CFM.
the 1953 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
2184
2250
2000
1750
1500
1250
1000
750
500
250
0
0.0
1.0
2.0
3.0
4.0
5.0
cfm
static pressure (inch/h2o)
5 hp grizzly dust collector performance results
max cfm max sp
hp
2184
14.0
5 hp
restrictor plate
dia
dia
dia.
(inch)
10"
9"
8"
static pressure
1.9
2.1
3.0
(inch/h2o)
CFM
2184 2129 2072 1953 1692 1381 977 691 488
the airflow test probe is located 1.5x duct diameter upstream from
the air inlet. test pipe length is a minimum of 10x duct diameter.
figure 58. g0442/g0601 performance curve
chart and data.
— 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 42 to
start buying the components necessary to
make your system a reality.
6.0
7.0
8.0
9.0
10.0 11.0 12.0 13.0
volts
inlet
impeller
220v
10"
16"
dia.
dia.
dia.
dia.
dia.
dia.
7"
6"
5"
4"
3"
2"
4.6
7.0
9.8
12.1 13.2 13.7
-37-
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