
P a g e 2 8 • D R I - S T E E M D e s i g n G u i d e
D R I - S T E E M D e s i g n G u i d e • P a g e 2 9
Table 29-1:
Air duct pressure losses for MAXI-BANK, Multiple-Tube, and Single-Tube jacketed steam injection
humidifiers
Duct air velocity
With insulated jackets: Tube centers or duct height with Single-Tube
6" 152 mm 9" 229 mm 12" 305 mm 18" 457 mm 24" 610 mm
fpm m/s wc Pa wc Pa wc Pa wc Pa wc Pa
500 2.5 0.02 5.0 0.02 5.0 0.01 2.5 0.01 2.5 0.01 2.5
1000 5.1 0.08 20.0 0.06 15.0 0.04 10.0 0.03 7.5 0.03 7.5
1500 7.6 0.18 45.0 0.14 35.0 0.10 25.0 0.07 17.0 0.07 17.0
Duct air velocity
With noninsulated jackets: Tube centers or duct height with Single-Tube
6" 152 mm 9" 229 mm 12" 305 mm 18" 457 mm 24" 610 mm
fpm m/s wc Pa wc Pa wc Pa wc Pa wc Pa
500 2.5 0.02 5.0 0.01 2.5 0.01 2.5 0.01 2.5 0.01 2.5
1000 5.1 0.06 15.0 0.05 12.0 0.04 10.0 0.03 7.5 0.03 7.5
1500 7.6 0.14 35.0 0.11 27.0 0.08 20.0 0.07 17.0 0.07 17.0
Air duct pressure loss in wc and Pa
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