Refer to a simplified diagram in the following page and to steam condenser dgm. SOS 0357551/1 (sheet 1/1) and steam dgm. SOS 0357550/1 (sheet 1/1) included in the Section 5, Volume II of this manual.The live steam flows through two steam strainers assembled to the body of the emergency stop valves and then through the H.P. control valve, actuated by means of the "Turbine control system".At the end of the medium pressure section a part of the steam flow through the valves for the extraction utilities and the other part flows through the L.P. control valves in the low pressure section of the turbine than discharges into the main condenser.The extraction steam flow is controlled downstream of the hydraulic operated check valve (2). In the main condenser (3) the exhaust steam is cooled and condensated by means of the cooling water. In the condensate water suction piping are installed two extraction pumps:-one electro main pump (4)-one electro stand-by pump (5).