Page 30 • DRI-STEEM XT Series Electrode Steam Humidifier Installation, Operation, and Maintenance Manual
Rapid-sorb pitch requirements
• When installing Rapid-sorb with the header outside a horizontal
airflow duct, consider the following pitch issues:
– For 1½" (DN40) dispersion tubes, use a fastener of sufficient
length to accommodate the 1/8"/ft (1%) pitch requirements
toward the ¾" pipe thread (DN20) header drain fitting.
– For 2" (DN50) dispersion tubes, the bracket can be mounted
flush 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.
Dispersion: Rapid-sorb (continued)
Table 30-1:
Pitch of interconnecting piping, dispersion tubes, and headers for Rapid-sorb evaporative dispersion units
Airflow
Type of
interconnecting piping
Diameter of
interconnecting piping
Pitch of
interconnecting piping
Pitch of
dispersion tubes
Pitch of
header
Horizontal
Vapor hose 1½" (DN40)
2"/ft (15%)
toward
Rapid-sorb
Vertically
plumb
1/8"/ft (1%)
toward
condensate
drain
Tubing or pipe 1½" (DN40)
1/8"/ft (1%)
toward
Rapid-sorb
Vertical
Vapor hose 1½" (DN40)
2"/ft (15%)
toward
Rapid-sorb 2"/ft
toward
header
1/8"/ft (1%)
toward
condensate
drain
Tubing or pipe 1½" (DN40)
1/8"/ft (1%)
toward
Rapid-sorb
XT_IOM_Jan_2008.pdf 32 11/19/2009 10:13:38 AM
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