28
STEAM INJECTION INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Field assembly
Note:
For Maxi-bank option, follow the “Maxi-bank option field assembly and
installation” instructions on Page 36.
1. Unpack shipment and verify receipt of all components with packing list.
Report any shortages at once.
2. Plan the tube bank. You need to know the required spacing distance
between tubes. See Table 29-1. Arrange tubes so steam will discharge
against the airflow, unless tubes are insulated (optional), in which case
they should blow with the air to prevent condensation on metal jacket
covering insulation.
3. Assemble header based on spacings determined in Step 2 above. If
header pipe size has not been specified, see Table 28-1. This table is
based on a maximum steam velocity of 7,000 to 10,000 fpm (36 to 51
m/s), which will result in lower noise levels and produce uniform steam
flow from all tubes. If noise level is not important or a uniform flow is not
critical, a smaller header size may be used.
4. Install tube adapter fittings in header tees. (See Figure 28-1.) It usually
works best to lay the header on the floor along with the tubes for Steps
5 – 7.
5. Install male pipe thread end of tube adapter into pipe fitting. Dope
threads and tighten leak tight sealer.
6. O-rings are installed inside of tube adapter.
NOTE:
Use synthetic oil to lubricate O-rings before installing.
7. Insert tube adapter into dispersion tube. As this is being done, if unit has
a silencer, squeeze hooks of silencer cage together and slide them into
tube adapter, allowing them to snap over rear edge of adapter. Complete
inserting adapter into tube, being careful not to damage O-rings.
NOTE:
Unless special-ordered, silencers are furnished only with Model 60
and Model 70 tubes equal to or shorter than 48" (1219 mm), and only
with black iron piping.
8. Slide tube into adapter being careful not to damage O-rings.
9. Install tubes in adapter fittings, making sure tubelets are pointing in proper
direction.
10. Cut to length, thread, and install steam jacket piping.
NOTE:
When the total tube length of dispersion tubes exceeds 45' (13.7
m), we recommend installing an additional steam inlet to the dispersion
tubes and an additional steam jacket trap. One for each additional 45' of
total tube length. Divide the tubes into equal groups. See Figures 32-1
and 35-1.
11. Make tube support strut using angle or channel iron, and bolt each tube
end in place.
OM-15
Tube adapter
Dispersion tube
O-rings
Header tee
(by installer)
Use the tube adapter to connect a non-threaded
tube to a threaded pipe fitting.
MULTIPLE-TUBE HUMIDIFIER
Table 28-1:
Multiple-tube humidifier header
sizes
Total capacity
Header size
lbs/hr
kg/h
inches
DN
up to 280
up to 127
1.5*
38*
up to 490
up to 222
2.0
50
491 to 980 223 to 444
3.0
80
981 to
1743
445 to 790
4.0
100
1744 to
2752
791 to 1248
5.0
125
2753 to
3989
1249 to 1809 6.0
150
* Non Maxi-bank only
mc_040710_1005
FIGURE 28-1: TUBE ADAPTER FOR
MULTIPLE-TUBE HUMIDIFIERS
