41
STS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
INSTALLATION
PITCH REQUIREMENTS
• For Rapid-sorb with the header outside a horizontal-airfl ow duct, consider
the following:
– 1½" (DN40) dispersion tubes: Use a fastener of suffi cient length to
ac com mo date the 1/8"/ft (1%) pitch requirements toward the 3/4"
pipe thread (DN20) header drain fi tting.
– 2" (DN50) dispersion tubes: The bracket can be mounted fl ush to the
ductwork. The 1/8"/ft (1%) pitch typically can be accomplished in the
length of the hose cuffs used to connect the tubes to the header.
• See Table 41-3 and the drawings on the following pages for pitch
requirements.
mc_060210_0953-NA
Table 41-2:
Rapid-sorb header capacities
Header capacity
Header diameter
lbs/hr
kg/h
inches
DN
≤ 250
≤ 113
2
50
251-500
114-227
3
80
501-800
228-363
4
100
801-1300
364-591
5
125
1301-2100 592-955
6
150
mc_060210_0936
Table 41-3:
Pitch of interconnecting piping, dispersion tubes, and headers for Rapid-sorb evaporative dispersion units
Airfl ow
Type of
interconnecting piping
Diameter of
interconnecting piping
Pitch of
interconnecting piping
Pitch of
dispersion tubes
Pitch of
header
Horizontal
Steam hose
1½" (DN40), 2" (DN50)
2"/ft (15%)
toward
Rapid-sorb
Vertically
plumb
1/8"/ft (1%)
toward
condensate
drain
Tubing
1½" (DN40), 2" (DN50),
3" (DN80), 4" (DN100),
5" (DN125), 6" (DN150)
1/8"/ft (1%)
toward
Rapid-sorb
Vertical
Steam hose
1½" (DN40), 2" (DN50)
2"/ft (15%)
toward
Rapid-sorb
2"/ft
toward
header
1/8"/ft (1%)
toward
condensate
drain
Tubing
1½" (DN40), 2" (DN50),
3" (DN80), 4" (DN100),
5" (DN125), 6" (DN150)
1/8"/ft (1%)
toward
Rapid-sorb
mc_020111_0945
Table 41-1:
Rapid-sorb tube capacities*
Tube diameter
Insulated
(High-Effi ciency
Tubes)
Uninsulated
inches
DN
lbs/hr kg/h lbs/hr kg/h
1½
40
43
19.5
40
18.2
2
50
80
36.4
77
35
* Capacities shown are for horizontal airfl ow.
See DriCalc for vertical airfl ow capacities.
If face height is <22” (559 mm), tube
quantity per panel may need to increase to
compensate for reduced capacity of short
tubes. Consult DriSteem or see DriCalc for
the correct calculation.
Dispersion: Rapid-sorb
