Siemens delivers first oil-free steam turbine to Vattenfall

Siemens (NYSE: SI) has delivered the first steam turbine (10-MW) that operates almost entirely without lubricants.

The bearing systems consist of oil-free, air-cooled, and electromagnetic bearings; while the valve actuators operate on a minimum supply of oil. The trial run was completed in Vattenfall's lignite-fired Jänschwalde steam power plant, in Brandenburg, Germany. Upon completion, the model SST-600 steam turbine was handed over to Vattenfall. The turbine has been operational since February 2015.

The oil-free turbine is suited for customers with stringent requirements for operating safety and reliability, such as in the oil and gas industry, or for use in offshore applications on drilling platforms.

The first SST-600 steam turbine with magnetic bearings was developed in cooperation with the University of Zittau/Görlitz.

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