
D R I - S T E E M V a p o r m i s t h u m i d i f i e r • P a g e 2 1
Note:
The above non-wetting data applies to all air velocities up to 2,000 fpm (10.2 m/s), and is based on air leaving the zone of humidification at conditions of
55 °F (13 °C) and the stated % RH.
Figure 21-1:
Single tube non-wetting distances
Table 21-1:
Single tube capacities
Tube size
Capacity
Without drain With drain
inches DN lbs/hr kg/h lbs/hr kg/h
1½ 40 28.4 13 56.8 25.8
2 50 56.8 25.8 85.2 38.6
S i n g l e t u b e d i s p e r s i o n
Figure 21-2:
Single tube without and with condensate drain
Pitch: See Notes
Pitch 1/8"/ft (1%)
4.5" (114 mm)
minimum from
bottom of duct
Condensate drain.
Pitch ¼"/ft (2%)
5" (127 mm)
1" (25 mm) air gap
6"
(152 mm)
OM-496B
With drain
Notes for single tube with condensate drain:
Recommended pitch toward humidifier for interconnecting hose, tubing or pipe:
• Vapor hose: 2" per ft (15%)
• 1½" tubing or pipe: ½" per ft (5%)
• 2" tubing or pipe: ¼" per ft (2%)
OM-496A
4.5" (114 mm)
minimum from
top of duct
Without drain
Pitch 2"/ft (15%)
Notes for single tube without condensate drain:
Recommended pitch toward humidifier for interconnecting
hose, tubing or pipe:
• Vapor hose: 2" per ft (15%)
• Tubing or pipe: 1/8" per ft (1%)
Pitch: See Notes
4.5" (114 mm) minimum
from top
of duct
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