Franco Tosi has been manufacturing steam turbines since 1904, and has over 1500 installations around the world. Considered one of the prime movers of the power generation, FTM has been supplying steam turbines for all types of power stations, from fossil fuel to nuclear to geothermal stations. FTM steam turbines are qualified by three features: efficiency, reliability and operation flexibility.

One century of experience in designing, manufacturing, erecting and commisioning hydraulic turbines and equipment is the best proof of Franco Tosi Meccanica's capability to meet the market demand for highly efficient, highly reliable and operationally flexible hydraulic turbines and equipment.

Steam turbines from Franco Tosi Meccanica are structurally simple and have symmetrical internal parts that are supported on the centreline plane. This allows easy design radial clearance during operation. Other efficiency features include:
1) High aerodynamic efficiency blades.
2) Low pressure drop in the valves and other non-power producing parts.
3) Liberally sized exhausts and effective diffusers to minimize hood losses.

1) High hydrodynamic efficiency for runners, wicket gates, stay rings, spiral cases and discharge.
2) Careful mechanical design in order to minimize parasitic losses ( e.g. bearings, seals ).

Our steam turbines are subjected to simulation tests and built to withstand pressure and stress. Some of our top features include:
1) Solid forged high and low pressure rooters.
2) Sturdily built control stages to withstand high stresses due to partial admission operation at low loads.
3) Successfully field testes standardized components such as blades, journal and thrust bearings, seals, valves and couplings.
4) High precision and sensitive electronic controllers

1) Rotating components ( shafts and runners ) designed and manufactured to withstand the most favourable conditions (e.g. runaway speed, generator short circuit ).
2) Stationary components designed and manufactured to withstand overpressures caused by load rejections.
3) Field and laboratory tested components such as runners, wicket gates, guide and thrust bearings.

FTM steam turbines are known for their service flexibility, allowing for quick starts and load changes. This flexibility is due to a systematic reduction of transient thermal stresses in the hot parts of the turbines, achieved through:
1) Double shell construction of casings.
2) Separate nozzle chambers.
3) Separate throttle and control valves (for temperatures above 510°C).
4) Steam cooling of heated parts.
5) Turbine stress evaluators (TSEs) that can be supplied on request. The TSE processes temperature values measured at proper turbine locations, calculates critical component stresses, compares calculated stresses with the maximum allowable values and provides the operator with a video image of the allowable load gradients.

1) Vertical or horizontal axis layout depending on plant requirements
2) Quick starts and load changes thanks to the careful design allowing for minimum control system operating times and pressure oscillations.
3) Smooth operation by the design of both turbine speed governor and control oil unit which allows load changes without undue load, pressure, flow or vibration fluctuations.