H series

The NG multi stage steam turbines are grouped in three different series:

  • H Series, of the back pressure or condensing types, for high inlet steam conditions, limited to 86 bar / 520 deg C.
  • M Series, of the back pressure or condensing types, for medium inlet steam conditions, limited to 45 bar / 450 deg C.
  • L Series, of the condensing type only, for low inlet steam conditions, limited to 12 bar / 350 deg C.

All the models are designated by a sequentially structured composition of letters and numbers. Thus, the first letter indicates the inlet pressure class of the turbine: H for “high”, M for “medium” and L for “low”. The second letter indicates the turbine type: B for “back pressure” and C for “condensing”. The numbers indicate the mean diameter of the wheels in round figures.

Finally, the suffix E indicates the provision of a controlled extraction, which is applicable on the H Series only.

Backpressure
Model HB 350 HB 420 HB 510 HB 630 HB 750 HB 900
Maximum Power 12.000kW 17.000kW 25.000kW 32.000kW 40.000kW 48.000kW
Rated speed 11.500rpm 9.500rpm 8.000rpm 6.500rpm 5.800rpm 4.750rpm
Max. Inlet pressure 86bar a 86bar a 86bar a 86bar a 86bar a 86bar a
Max. Inlet temperature 520ºC 520ºC >520ºC 520ºC 520ºC 520ºC
Max. exhaust pressure 15 bar a 15 bar a 15 bar a 15 bar a 8 bar a 8 bar a
Inlet flange 2 x 150mm 2 x 175mm 2 x 200mm 2 x 225mm 2 x 250mm 2 x 300mm
Exhaust flange 400mm 500mm 600mm 750mm 840mm 915mm
Max. number of stages 12 12 12 12 12 12
Condensing
Model HC 500 HC 650 HC800 HC 1000 HC 1250 HC 1500
Maximum Power 18.000kW 25.000kW 35.000kW 42.000kW 50.000kW 60.000kW
Rated speed 10.250rpm 8.500rpm 6.500rpm 5.800rpm 4.750rpm 3.600rpm
Max. Inlet pressure 86bar a 86bar a 86bar a 86bar a 86bar a 86bar a
Max. Inlet temperature 520ºC 520ºC 520ºC 520ºC 520ºC 520ºC
Max. exhaust pressure vacuum vacuum vacuum vacuum vacuum vacuum
Inlet flange 2 x 150mm 2 x 175mm 2 x 200mm 2 x 225mm 2 x 250mm 2 x 300mm
Exhaust flange 750mm 1.040mm 1.390mm 1.650mm 1.930mm 2.110mm
Max. number of stages 15 15 15 15 15 15
Condensing with double exhaust flow
Model HC 500/500 HC 650/650 HC 800/800 HC 1000/1000 HC 1250/1250 HC 1500/1500
Maximum Power 16.000kW 24.000kW 38.000kW 52.000kW 60.000kW 75.000kW
Rated speed 10.250rpm 8.500rpm 6.500rpm 5.800rpm 4.750rpm 3.600rpm
Max. Inlet pressure 86bar a 86bar a 86bar a 86bar a 86bar a 86bar a
Max. Inlet temperature 520ºC 520ºC 520ºC 520ºC 520ºC 520ºC
Max. exhaust pressure vacuum vacuum vacuum vacuum vacuum vacuum
Inlet flange 2 x 150mm 2 x 175mm 2 x 200mm 2 x 225mm 2 x 250mm 2 x 300mm
Exhaust flange 2 x 750mm 2 x 1.040mm 2 x 1.390mm 2 x 1.650mm 2 x 1.930mm 2 x 2.110mm
Max. number of stages 22 22 22 22 22 22