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Model W1867/W1868/W1869 (For Machines Mfd. Since 11/18)
SE
TU
P
Figure.43.
Main line size labeled on sketch.
400
400
600
850
400
250
100
5"
6"
7"
Table Saw
Planer/
Moulder
Miter
Saw
Jointer Sander
Planer
Shaper
Dust
Collector
Determining.Main.Line.Duct.Size
Determining.Branch.Line.Duct.Size
The general rule of thumb for a main line duct
is that the velocity of the airflow must not fall
below 3500 FPM.
For small/medium sized shops, using the inlet
size of the dust collector as the main line duct
size will usually keep the air velocity above 3500
FPM and, depending on your system, will allow
you to keep multiple branches open at one time.
Mark your drawing, as shown in the figure
below, but using the inlet size for your dust
collector as the main line.
The general rule of thumb for a branch line duct
is that the velocity of the airflow must not fall
below 4000 FPM.
For small/medium sized shops, using the dust
port size from the machine as the branch line
duct size will achieve the correct velocity in
most applications. However, if the dust port on
the machine is smaller than 4", make the branch
line 4" and neck the line down right before the
dust port.
Note:.
Systems with powerful dust collectors
work better if multiple blast gates are left open.
This also allows you to run two machines at
once. Experiment with different combinations of
blast gates open/closed to find the best results
for your system.
Figure.44.
Branch line duct sizes labeled.
400
400
600
850
400
250
100
4"
4"
4"
6"
4"
4"
5"
5"
6"
7"
Table Saw
Miter
Saw
Jointer
Sander
Planer
Shaper
Planer/
Moulder
Dust
Collector
Figure.45.
Sizing chart for multiple machines
on the same branch line.
If two machines will connect to the same branch
line and both will operate at the same time,
then add the required CFM for each machine
together and find the closest total CFM in the
table below to determine the correct branch
size.
If both machines will never run at the same
time, reference the machine with the biggest
dust port in the table
.
below and add blast gates
after the Y-branch to open/close the line to each
machine.
Total.CFM
Branch.Line.Size
400
4"
500
4"
600
5"
700
5"
800
6"
900
6"
1000
6"
Write your determined branch line sizes on your
drawing, as shown in the following
figure
.
Summary of Contents for W1867
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