Specifications

12
DISPERSION USING DISPERSION TUBES
Figure 12-1: Single-Tube
Mounting dispersion tube without
condensate drain
• Orient dispersion tubes so that tubelets point up.
• Connection can be made to the humidifier with
vapor hose or hard piping.
• Hard piping should have a minimum
I.D. of DN40 (1½") .
• Maintain a minimum pitch of 15% back to the
humidifier should be maintained.
• Short-sweep 90° elbows are not recommended;
use two 45° elbows 300 mm apart or long-
sweep 90° elbows instead.
• Thin-walled tubing will heat up faster than
heavy-walled pipe, causing less steam loss
at start-up.
• Insulating hard piping will reduce the steam
output loss caused by condensation.
• When mounting the humidifier above the level
of dispersion tube, see Figure 10-2 on Page 10.
Mounting dispersion tube with
condensate drain
• Orient dispersion tube so that tubelets point up.
• The dispersion tube must be pitched a minimum
of 1% toward the drain when using a
condensate drain.
• Condensate drain tubing must be pitched a
minimum of 2% back to the humidifier.
• Condensate drain is not provided when steam
flow is kg/h or less.
Failure to follow these recommendations may result
in excessive back pressure on the humidifier. This
may lead to dispersion tube(s) spitting, steam
blowing through water seals, or leaking gaskets.
When the distance between humidifier and the
dispersion tube(s) exceeds 6 m, consult factory for
recommendations.
Mounting a RAPID-SORB dispersion
panel
For RAPID-SORB mounting dimensions, please see
the drawing at right.
Figure 12-2: RAPID-SORB
®
with condensate
wasted to floor drain
Notes:
* When steam flow is 15 kg/h or less, condensate drain tubing
is not provided by DRI-STEEM. A minimum pitch of 15%
back to the humidifier must be maintained in the dispersion
tube when there is no separate condensate drain.
** Condensate drain tubing material must be suitable
for 100 °C water.
OM-351-1
Movable duct plate (can be
mounted within limits of 65 mm).
85 mm
2% pitch
1% pitch
15% pitch
Insertion
length
3.25"
OM-224-s
DN40
(1½")
vapor
hose
or rigid
piping
85 mm
85 mm
85 mm
65 mm
85 mm
85 mm
Mounting nut
Mounting nut
High temperature
resin tubelets
DN15 (1/2" O.D.) stainless
steel (condensate drain)*
DN8 (1/4" NPT)
coupling*
Dispersion tube
Orificed tubelets
Air gap
125 mm min.
150 mm min.
Mounting bracket
Escutcheon
plate
Air flow
Duct
Slip coupling
or hose cuff
Pitch 1%
minimum
Header
SST channel
Open drain
DN20 (¾")
condensate
drain** tube
by others
High temperature
resin tubelets
Insertion
length
65 mm
VM99-C-0400-M-0801.pdf 12 11/19/2009 9:51:55 AM