DRI-STEEM Ultra-sorb Steam Dispersion Panel Installation, Operation, and Maintenance Manual • Page 17
Steam from a boiler
Ultra-sorb panels for boiler steam have a threaded pipe nipple that
extends outside the framework for a steam supply connection. The
steam supply line should be dripped immediately ahead of the
steam valve through a steam trap.
Recommended drip trap type:
(See Page 16 for trap dimensions)
Low pressure: Less than 15 psi — Float and Thermostatic (F&T)
High pressure: More than 15 psi — Inverted Bucket
Install wye strainer ahead of the steam valve.
Two ¾" (20 mm) F&T traps, one for each header, are required on
the horizontal dispersion tube (Model LH) Ultra-sorb. One float
and thermostatic trap is required on the lower header of the vertical
tube (Model LV) Ultra-sorb.
1. To ensure driest steam, take the humidifier steam supply off the
top of the steam main (instead of side or bottom).
2. An air flow proving switch is recommended to prevent the steam
valve from opening if air is not moving in the duct.
3. To prevent over saturation when duct air is cooler than 70 °F
(21 °C), high limit (duct mounted) humidistat at least 15 feet
(4.5 m) downstream and set at 80-90% is recommended.
4. Steam from the dispersion tube tubelets must be discharged at
right angles to the airstream for best non-wetting results.
P i p i n g
Figure 17-1:
Ultra-sorb strainer
Install strainer same size as
valve and within 3" (1 m)
of Ultra-sorb
Valve
Table 17-2:
O.D. of pipe and tubing
Nom.
Dia.
Standard
pipe
Tubing
copper
Tubing
SST
I.D. of
hose
1¼"
(30 mm)
1.660
1.375
-
-
1½"
(38 mm)
1.900
1.625
1.500
1.50
2"
(50 mm)
2.375
2.125
2.000
2.00
2½"
(65 mm)
2.875
2.625
3.000
3.00
Note:
Pipe thread and flange tubing adapters
are available from DRI-STEEM.
From
steam
source
Table 17-1:
Maximum steam carrying capacity and length of interconnecting vapor hose, tubing, and pipe*
Vapor hose
†††
Copper or stainless steel tubing
and Schedule 40 steel pipe
Hose I.D.
Maximum capacity
Maximum length**
Tube or pipe size***
Maximum capacity
Maximum developed
length
†
inches
DN
lbs/hr
kg/h
ft
m
inches
DN
lbs/hr
kg/h
ft
m
1½
40
150
68
10
3
1½
40
150
68
20
6
2
50
250
113
10
3
2
50
220
100
30
9
3
††
80
††
450
204
80
24
4
††
100
††
750
340
100
30
5
††
125
††
1400
635
100
30
6
††
150
††
2300
1043
100
30
* Based on total maximum pressure drop in hose, tubing, or piping of 5" wc (1244 Pa)
** Maximum recommended length for vapor hose is 10' (3 m). Longer distances can cause kinking or low spots.
*** To minimize loss of capacity and efficiency, insulate tubing and piping.
†
Developed length equals measured length plus 50% of measured length to account for pipe fittings.
††
Requires flange connection
†††
When using vapor hose, use DRI-STEEM vapor hose for best results. Field-supplied hose may have shorter life and may cause foaming in the evaporating
chamber resulting in condensate discharge at the dispersion assembly. Do not use vapor hose for outdoor applications.
US-IOM-0108.pdf 17
4/21/2010 11:34:58 AM
