Woodstock W1816 Additional Factors Static Pressure, Seasoned well used Dust Collection Filter

W1816 Owner's Manual (Mfg. Since 10/09)

OPERATIONS

In most small/medium shops it is only necessary to calculate the line with the longest duct length or the most fittings (operating under the assumption that if the line with the highest resistance works, the others will be fine).

To calculate the static pressure of any given line in the system, do these steps:

1.Make a list of each size duct in the line, including the length, and multiply those numbers by the static pressure value given in Figure 46.

2.List each type of elbow or branch and multiply the quantity (if more than one) by the static pressure loss given in Figure 46.

3.Add the additional factors from Figure 47 to your list.

4.Total your list as shown in the example in Figure 48 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.

Additional Factors	Static Pressure
Seasoned (well used)	1"
Dust Collection Filter
Entry Loss at Large	2"
Machine Hood

Figure 47. Additional factors that affect static pressure loss (airflow resistance).

Main Line
6" Rigid Pipe (0.037) at 20'	0.740
Branch Line
4" Rigid Pipe (0.075) at 10'	0.750
4" Flex Pipe (0.28) at 5'	1.400
Elbows/Branches
6" 45˚ Y-Branch	0.329
4" 45˚ Elbow	0.225
Additional Factors
Seasoned Filter	1.000
Total Static Pressure Loss	4.444

Figure 48. Example of calculating the

total static pressure loss.

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