L 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.

Condensing
Model LC 500 LC 650 LC 800 LC 1000 LC 1250 LC 1500
Maximum power 4.000kW 7.000kW 10.000kW 15.000kW 20.000kW 25.000kW
Rated speed 10.250rpm 8.500rpm 6.500rpm 5.800rpm 4.750rpm 3.600rpm
Max. Inlet pressure 12bar a 12bar a 12bar a 12bar a 12bar a 12bar a
Max. Inlet temperature 350ºC 350ºC 350ºC 350ºC 350ºC 350ºC
Max. Exhaust pressure vacuum vacuum vacuum vacuum vacuum vacuum
Inlet flange 2 x 150mm 2 x 200mm 2 x 250mm 2 x 300mm 2 x 350mm 2 x 400mm
Exhaust flange 750mm 1.040mm 1.390mm 1.650mm 1.930mm 2.110mm
Max. number of stages 7 7 7 7 7 7
Condensing with double exhaust flow
Model LC 500/500 LC 650/650 LC 800/800 LC 1000/1000 LC 1250/1250 LC 1500/1500
Maximum power 7.000kW 12.000kW 20.000kW 30.000kW 40.000kW 50.000kW
Rated speed 10.250rpm 8.500rpm 6.500rpm 5.800rpm 4.750rpm 3.600rpm
Max. Inlet pressure 12bar a 12bar a 12bar a 12bar a 12bar a 12bar a
Max. Inlet temperature 350ºC 350ºC 350ºC 350ºC 350ºC 350ºC
Max. Exhaust pressure vacuum vacuum vacuum vacuum vacuum vacuum
Inlet flange 2 x 150mm 2 x 200mm 2 x 250mm 2 x 300mm 2 x 350mm 2 x 400mm
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 12 12 12 12 12 12