TURBINE CASING (condensing turbine)

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 the main part of the turbine outer casing are the admission suction, the exhaust section, and the intermediating section, the length of which is determined by the number of stages required

ALL the parts of the turban outer casing are of cast steel, with the exception of the exhaust section which is of grey cast iron and which is bolted to the intermediate section.


The outer casing is split axially the top and bottom parts are bolted together. the upper part of the casing includes the integrally cast valve chest.this is in the form of a horizontal pipe, on one and of which the emergency stop valve casing with the initial steam inlet is welded on the at the other end is blind flange. if the flow rates are sufficiently high, emergency stop valves can be arranged at both ends.

 The valve chest is connected to the interior of the outer casing via holes that take the control valve seats.

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The outer casing is divided into several sections of different pressures .the pressure chambers are bounded by the webs which take the guide blade carriers. the  nizzle casing and the packing glands are also flexibly mounted in the interior of the outer casing to allow for thermal expansion.
 THE REAR BEARING HOUSING IS ARRANGED IN THE EXHAUST SECTION.