Charts 2018-03-19T10:38:44-05:00

Measurement and Conversion Charts

Chart 1:

CFM requirements for diameter at specified velocity
Diameter3500 FPM4000 FPM4500 FPM
3″170195220
4″300350390
5″475550610
6″700785880
7″95011001200
8″120014001570
9″155018001990
10″190022002450
12″280031753600
14″380043004800

Chart 2:

Static Pressure based on 100′ of Pipe
Diameter3500 FPM4000 FPM4500 FPM
3″7.510.012.0
4″5.57.08.5
5″4.25.56.5
6″3.54.55.5
7″2.83.84.5
8″2.43.23.8
9″2.02.83.4
10″1.82.43.0
12″1.22.02.5
14″1.31.62.0

Chart 3:

Elbow to Straight Pipe Conversion
Diameter90° Elbow
1.5 Diameter Rad.
45° Elbow
1.5 Diameter Rad.
3″5′2.5′
4″6′3′
5″9′4.5′
6″12′6′
7″12′6.5′
8″15′7.5′
9″17.5′8.75′
10″20′10′
12″25′12.5′
14″30′15′