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Chlorine, in the form of chlorates, is the basic material for the manufacture of herbicides. The material is dampened with water and mixed with other chemicals appropriate for the final application to prepare it for further processing. This is done under a vacuum using a 2-shaft paddle mixer with screws rotating in opposite senses. In order to seal the shaft at the mixer housing, the operator required a seal with a shaft sleeve to protect the paddle shafts. It would have to keep the dusts and the chlorine gases generated in the process within the mixer housing, and its function would have to remain unimpaired by the presence of the powder.
The Espey solution for the 2-shaft paddle mixer is a combined Espey WD200/500 with a connection for barrier gas and 3 seal rings. Its split housing permits assembly without dismantling the drive motors, and is designed for a temperature of 94 °C (201.2 °F), vacuum, and a rotation speed of 30 rpm. Dry air is used as the barrier medium; adequate quantities are available without additional supply equipment. The dust present at the seals inside the mixer is kept away from the sealing region by slip rings. Because the shafts of the paddle mixer do not have suitable wear protection, Espey designed a two-piece shaft sleeve with a suitable coating to protect the shaft. The seal solution has a long service life, is maintenance-free, and compensates for shaft movements.
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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.
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.