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.
Application example: Sealing of centrifuges in the HDPE production
Issue and challenge:
In precipitation polymerisation (the slurry process), ethylene reacts in an inert gas atmosphere (hydrogen) containing a solvent (hexane) in the presence of catalytic agents to form polyethylene. Under the conditions used in this process, ethylene is soluble in hexane but polyethylene is insoluble, and precipitates in the form of a fine suspension. The polymer is separated from the hexane in centrifuges. The separated hexane is returned again to the polymerisation process. The centrifuges used for separating the two phases (polyethylene – hexane) requires a seal for the inlet pipe and two casing seals, each having a leakage and flushing connection. Because the hexane is inflammable, an ATEX version is necessary.
Solution from EagleBurgmann Espey:
For the inlet pipe seal and the two casing seals, Espey designed a combined Espey® WD 200HDT/500 with six seal rings in an ATEX version, with barrier gas and flushing connections as well as leakage removal and the corresponding connections for introducing ethylene and hexane into the centrifuge, designed for a temperature of 90 °C (194 °F), a vacuum of 0.6 bar (8.7 PSI), and a rotation speed of 1400 rpm. Nitrogen is used as barrier gas. The seals are easily fitted, thanks to the split casing. Because the shaft of the centrifuge does not have suitable wear protection, Espey designed two-piece shaft sleeves with a suitable coating to protect the shaft. The seal solution has a long service life, is maintenance-free, and is designed for dry running.
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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.