Refurbishment and modernization

of hydro power plants

Inspectionand assembly

Engineering and design

Hydraulic steelwork

Upgrading andautomation

Stellba – A modern, future-oriented companywith highly motivated employees

A brief history of Stellba• 1957 Stellba hardfacing was founded in Urdorf,

Switzerland• 1982 WKA was founded in Heidenheim, Germany• 1984 Construction of the production facility in

Heidenheim• 2002 Takeover of WKA by Stellba Hydro,

Heidenheim, Germany• 2002 Stellba Hydro was founded in Birrhard,

Switzerland

Our key activitiesStellba Hydro manufactures and repairs hydro powerstations. Our key activities focus on the areas ofinspection and upgrading. We design, machine andassemble new turbines, turbine control systems andcomponents for hydraulic steelworks.

Stellba has its own production facilities in Heidenheim(Germany) as well as in Baden-Daettwil and Birrhard(Switzerland). All production facilities are equippedwith state-of-the-art CNC-controlled machines.Stellba employees are specialists with experience inall types and brands of turbines. A project manageris on hand throughout the entire duration of inspec-tion and modernization of the projects. You, as ourcustomer, then have a single contactperson wholooks after all your technical and organizational requirements.

Our references and our experience• 40 MW Francis turbines – general overhaul• 8.8 MW Kaplan turbines with automation• 32 MW new Pelton runners• more than 500 other demanding projects

Preventive wear protectionHigh flow rates and solid paticals in the water result inextremely short service lives of turbines. Servicelives can be raised considerably by means of hardfa-cing and optimization of components, while at thesame time reducing the maintenance and repair costs.

Stellba has more than 40 years experience in preven-tive wear protection with the use of hardfacing.Various methods of hardfacing are continually impro-ved due to research projects.

806040 100 120 140 160 180 200 220 240

Steel 1.4313Stelljet

Fluid flow rate [m/s]Solid partical concentration c = 0.03 weighting-%

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Material loss caused by erosion as a function of thefluid flow rate for a carbide coating (Stelljet) and anon-coated steel of the quality 1.4313.

• Control units

• Hydraulic auxiliaries

• Oil supply systems forregulators

• Screen systems

• Weir controllers

• Electrical installations

Our experience in technical optimization of your hydro power plant

• General overhaul

• Partial overhaul

• Kaplan turbines (shaft, pipe)

• Francis turbines(shaft, spiral)

• Expansion turbineAxent

Upgrading

Automations

Inspectionand assembly

Hydraulic steelwork

Engineering and design

• Pelton turbines

• Spare parts for all turbine brands

• In-house production inGermany, Switzerland

• Hardfacing for wear protection

• Own site mechanics

• Runners

• Distributors of water turbines

• Bearing systems

• Sealing systems

• Oil supply facilities

• Cooling facilities

• Gearings

• Generators

• New facilities

• Turbine governors – digital or analog type– speed/water level– power (flow rate)

• Turbine control system

• Auxiliary device control

• Process visualization

• Thrash-rake machines– stationary– horizontal– hydraulic– mechanical– portable, swivel

• Coarse and fine screen

• Thrash transport system

• Flow over ducts

• Weirs

• Weir wickets

• Wooden and steel staplocks

• Stop locks

• In-house engineers

• In-house draftsmen

• Maintenance and service

• Inspection

• Planning and calculation

• Documentation

• Optimization of– efficiency– performance– wear behaviour

• Research projects

• Quality assurance

Stellba Hydro AG

Langgass 2 • CH-5244 Birrhard

Phone +41 (0)56 201 43 43

Fax +41 (0)56 201 43 41

www.stellba.ch • info@stellba.ch

Stellba Hydro GmbH & Co KG

Badenbergstr. 30 • D-89520 Heidenheim

Phone +49(0)7321 - 96 92-0

Fax +49(0)7321 - 6 20 73

www.stellba.de • info@stellba.de 1020

02 /

500

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