Our fire tube boilers are horizontal arrangement, three pass wet back boiler. And most of the fire tube boilers now come in a complete package.
forced draft fan
automatic control system.
The most basic type of a package boiler is single passage three pass design. One such boiler is shown in the figure. The first pass of the water will be through the partly corrugated furnace and the cylindrical combustion chamber. The second pass starts when the water converts into steam and flow from the furnace into small bore smoke tubes located over the furnace. At the end of the pass and near the central smoke box, the flow divides into two parts. The third pass of the steam is through the smoke tubes located outside the main arrangement and which opens at the exit on the rear of the boiler.
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