Steam Boilers, Engines, Nozzles and Turbines
In water tube boilers

Forced circulation takes place
None of these
Water passes through the tubes which are surrounded by flames and hot gases
The flames and hot gases pass through the tubes which are surrounded by water

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Steam Boilers, Engines, Nozzles and Turbines
A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

Supplied by same manufacturer loose and assembled at site
Packaged boiler does not exist
Supplied mounted on a single base
Purchased from several parties and packed together at site

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