Steam Boilers, Engines, Nozzles and Turbines
In an impulse turbine

The steam is expanded in moving blades only
The steam is expanded both in fixed and moving blades continuously
The pressure and temperature of steam remains constant
The steam is expanded in nozzles only and there is a pressure drop and heat drop

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

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