M 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 MB 350 MB 420 MB 510 MB 630 MB 750 MB 900
Maximum power 7.000kW 10.000kW 15.000kW 22.000kW 27.000kW 32.000kW
Rated Speed 11.500rpm 9.500rpm 8.000rpm 6.500rpm 5.800rpm 4.750rpm
Max. Inlet pressure 45bar a 45bar a 45bar a 45bar a 45bar a 45bar a
Max. Inlet temperature 450ºC 450ºC 450ºC 450ºC 450ºC 450ºC
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 250mm 2 x 300mm 2 x 350mm
Exhaust flange 400mm 500mm 600mm 750mm 840mm 915mm
Max. number of stages 6 6 6 6 6 6
Condensing
Model MC 500 MC 650 MC 800 MC 1000 MC 1250 MC 1500
Maximum power 5.000kW 8.000kW 14.000kW 21.000kW 28.000kW 36.000kW
Rated Speed 10.250rpm 8.500rpm 6.500rpm 5.800rpm 4.750rpm 3.600rpm
Max. Inlet pressure 45bar a 45bar a 45bar a 45bar a 45bar a 45bar a
Max. Inlet temperature 450ºC 450ºC 450ºC 450ºC 450ºC 450ºC
Max. Exhaust pressure vacuum vacuum vacuum vacuum vacuum vacuum
Inlet flange 2 x 150mm 2 x 175mm 2 x 200mm 2 x 250mm 2 x 300mm 2 x 350mm
Exhaust flange 750mm 1.040mm 1.390mm 1.650mm 1.930mm 2.110mm
Max. number of stages 9 9 9 9 9 9
Condensing with double exhaust flow
Model MC 500/500 MC 650/650 MC 800/800 MC 1000/1000 MC 1250/1250 MC 1500/1500
Maximum power 10.000kW 17.000kW 27.000kW 42.000kW 55.000kW 70.000kW
Rated Speed 10.250rpm 8.500rpm 6.500rpm 5.800rpm 4.750rpm 3.600rpm
Max. Inlet pressure 45bar a 45bar a 45bar a 45bar a 45bar a 45bar a
Max. Inlet temperature 450ºC 450ºC 450ºC 450ºC 450ºC 450ºC
Max. Exhaust pressure vacuum vacuum vacuum vacuum vacuum vacuum
Inlet flange 2 x 150mm 2 x 175mm 2 x 200mm 2 x 250mm 2 x 300mm 2 x 350mm
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 16 16 16 16 16 16