21
STEAM INJECTION INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Assembly
Detail: Tube adapter single dispersion tube
Dispersion tube
Silencer
(tubes 48" [1219 mm]
and shorter only)
Tube adapter
O-rings
Automatic valve
Silencer cage
OM-7, OM-14
Hooks of
silencer cage
Two-piece escutcheon plate
O-rings
Dispersion tube
Valve
separator
assembly
Tube adapter
Half coupling
Support
bracket
Teflon
®
seal ring
Pipe union
Actuator
Strainer
Steam
discharge
tubelets
Steam trap
Single-tube humidifier
SINGLE-TUBE HUMIDIFIER FIELD ASSEMBLY
Small units are shipped assembled; the following applies to larger units that are disassembled for shipment.
1. Unpack shipment and verify receipt of all components with packing list. Report any shortages at once.
2. Match up dispersion tube with its proper valve-separator assembly (tubes and separators are match-tagged).
Tubelets should point against the airflow for better steam-air mixing, except if tubes have fiberglass insulated-jacket
option, then tubelets should discharge steam with the airflow to prevent condensation from forming on cool jackets.
See the installation examples on the following pages before beginning assembly.
Note: Before completing Step 3, determine which way (right or left) tubelets should point, and install in appropriate
half coupling (see Figure 4-1).
3. Unscrew pipe union, remove elbow and nipple portion, and install in half coupling of tube.
4. Install tube adapter in valve (use pipe dope) and tighten.
5. Lubricate O-rings and install inside tube adapter.
6. 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 the 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.
7. Tighten pipe union.
8. Thread Teflon seal ring into half coupling.
9. Torque Teflon seal ring to 15 ft-lbs (20.3 N-m).
Note: Once tightened, do not attempt to re-tighten the Teflon seal, or the seal could be damaged.
10. Install the assembly in the duct. See “Installation” on the next page.
SINGLE-TUBE HUMIDIFIER
FIGURE 21-1: SINGLE-TUBE HUMIDIFIER FIELD ASSEMBLY
