750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
8-27
8.20 — Refractory
FIGURE 8-12. Refractory Throat Tile
8.20.2 — Throat Tile and Liner Installation
The throat tile must be installed to maintain an approximately 12” inside diameter, and be centered in the furnace.
Since the thickness of the furnace metal varies with the boiler design pressure, a shim of appropriate thickness must
be used to compensate for the variance. A layer or two of insulating board or equal, or a bed of refractory material,
may be used to center the ring.
The liner tile can be fitted tightly against the furnace, since the finished diameter is not critical.
FIGURE 8-13. Furnace Liner Refractory
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