EagleBurgmann international
EagleBurgmann WORLDWIDE
With around 250 locations and 90 serve centers, we are represented in the most important economic regions of the world. The advantages are clear: short paths to our customers, fast response times and a shared language.
The turbine shafts of power station turbines can weigh several hundred tonnes. In combination with the comparably high rotation speeds, enormous forces are generated. In unfavourable cases, a malfunction can cause the turbine to burst; flying broken fragments could, for instance, damage a nuclear reactor. To prevent this possibility, double-fast-closing shut-off valves regulate the steam-controlled rotation speed of the turbine. In an emergency they must be able to close within 0.3 seconds. In the past, the seal between the flap and the steam pipeline was implemented with packing glands. Their disadvantage is the high breakaway torque, which is compensated for by very large hydraulic drives with high inertia. A new sealing system will allow these drives to be made significantly smaller. Regulating the speed of rotation by means of steam valves has also been found to be too sluggish. The fittings manufacturer was therefore looking for an appropriate sealing system.
Solution from EagleBurgmann Espey:
By modifying the double-fast-closing shut-off valve and integrating the Espey WKA600S chamber seal with leakage disposal for a shaft diameter of 240 mm (9.45 “) in order to seal the flaps, the breakaway torque could be reduced so far that the flaps could be shut within 0.3 seconds at the same time as designing the drive smaller. The seal has 7 seal rings in 3 ring groups. This, together with their detailed implementation, allows the pressure of the steam pipeline – 11.6 bar (168.24 PSI) at an operating pressure of 311 °C (591.8 °F) – to be dropped with extremely low leakage.
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The Eagleburgmann Group
Sealing technology for plants and machines
EagleBurgmann is one of the worldwide leading providers of industrial sealing technology. Mechanical seals, seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints, gaskets and packings as well as comprehensive services are used wherever reliability and safety are needed.
Mechanical seals and more
Sealing technology by EagleBurgmann is used worldwide in oil and gas industries, refineries, the petrochemical, chemical, and pharmaceutical industries, food processing, energy, water, mining, paper, aerospace, and other industries. Close to 5,800 employees provide their ideas, solutions, and commitment so that customers can rely on our sealing technology.
What makes us stand out is our excellent quality, great innovative capacity, and an extensive product portfolio for nearly all industrial processes and fields of application. Our product portfolio includes everything from mechanical seals and seal supply systems to magnetic couplings, carbon floating ring seals, expansion joints, and gaskets and packings as well as comprehensive services. Since we are part of the German Freudenberg and Japanese EKK group, we have all the necessary resources for a firmly based reliable partnership.