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Rapid-sorb pitch requirements
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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.
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pitch requirements.
Table 25-1:
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" (DN50)
2"/ft (15%)
toward
Rapid-sorb
Vertically
plumb
1/8"/ft (1%)
toward
condensate
drain
Tubing or pipe
1½" (DN40)
2" (DN50)
1/8"/ft (1%)
toward
Rapid-sorb
Vertical
Vapor 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)
1/8"/ft (1%)
toward
Rapid-sorb
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VM-IOM-1108.pdf 27 4/21/2010 1:36:22 PM
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