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W1816 Owner's Manual (Mfg. Since 10/09)
OPERATIONS
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 for your dust
collector on Page 4.
Example: The Model W1816 Data Sheet
Performance Curve is illustrated in Figure 49.
Find 4.4 on the Static Pressure axis (the amount of
total static pressure loss calculated in Figure 48),
then refer to the closest value on the CFM axis—
approximately 1380 CFM.
The 1380 CFM for the static pressure loss of the line
connected to the router table is well above the 220
CFM requirement of that machine.
— 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.
— 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)
reducing90˚elbowsorreplacingthemwith45˚
elbows
Ø8"
66
1
/2"
44"
20
21
/32"
10"
15
3
/4"
56
1
/2"
7"
18
7
/8"
9"
80"
26
1
/2"
2000
1750
1500
1250
1000
750
500
250
0 2 3 4 5 6 7 8 9 10 11
1090
1489
1407
1319
1246
0
Performance Curve
Static Pressure (Inch/H
2
O)
Air Suction Capacity (CFM)
3 HP Woodstock Dust Colletor Performance Results
Max CFM Max SP HP Volts Inlet Impeller
1489 10.2 3 220 8"
14
1
⁄2"
Restrictor Plate
Size
Static Pressure
(Inch/H
2
O)
Air Suction
Capacity (CFM)
8" 7" 6" 5" 4"
2.2 3.8 5.1 6.8 8
1489 1407 1319 1246 1090
The airflow test probe is located 1.5 x
duct diamter upstream from the air
inlet. Test pipe length is a minimum of
10 x duct diameter.
Machine Dimensions
12
11
/16"
Figure 49. Example of CFM for static
pressure loss for the duct line connected
between the dust collector and a router
(220 CFM).
4.4 SP
Loss
Closest CFM
(1380)