Bulb & Pit turbines and S-type turbines
Compact, highly efficient solutions engineered for low-head and high-discharge applications.
When site conditions demand the utilization of water energy at low heads and medium to high discharges, Bulb and Pit turbines provide the ideal architecture.
By integrating the generator directly within the water passage or inside an easily accessible pit, these tubular arrangements offer highly streamlined, space-saving configurations. They deliver the robust efficiency of Kaplan technology while minimizing the civil footprint of the powerhouse.
Operational parameters
Core features
The bulb & pit advantage
Designed for low heads and medium to high discharges, these space-saving tubular turbines integrate the generator directly into the water passage or an accessible pit. Here is how they maximize your site's potential:
Compact bulb integration
Designed for medium to high outputs , Bulb turbines utilize intensively cooled generators to combine the turbine and generator into one highly compact unit. Typically driven directly via a horizontal or inclined shaft, this design ensures highly efficient power transfer.
Streamlined pit access
Perfect for installations with minimum outputs , Pit turbines situate the generator in a dedicated pit directly within the flow passage system. This intelligent placement dramatically simplifies access to individual parts for erection, daily supervision, and long-term maintenance.
Versatile drive systems
To perfectly match your site's hydrological profile, these turbines are manufactured with either single or double regulation capabilities. Depending on the optimal turbine speed, the generator can be connected directly to the shaft or via a mechanical speed-increaser.
Ready to build your next powerhouse?
Whether you are planning a greenfield installation or need to uprate a century-old turbine, our engineering teams are ready to architect your solution.