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

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Steam Boilers, Engines, Nozzles and Turbines
In a reaction turbine

The pressure and temperature of steam remains constant
The expansion of steam takes place partly in the fixed blades and partly in the moving blades
The steam is allowed to expand in the nozzle, where it gives a high velocity before it enters the moving blades
The steam is expanded from a high pressure to a condenser pressure in one or more nozzles

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