48
VAPORSTREAM INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Table 48-3:
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 or pipe
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 or pipe
1½" (DN40), 2" (DN50),
3" (DN80), 4" (DN100),
5" (DN125), 6" (DN150)
1/8"/ft (1%)
toward Rapid-sorb
mc_020111_0945
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 ¾" 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 the table below and the drawings on the following
pages for pitch requirements.
mc_060210_0953-NA
Rapid-sorb
Table 48-2:
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 48-1:
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
Note:
*
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.
INSTALLATION
Dispersion:
