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Magnetically Driven Pumps: An Overview

By Richard Tym ITT Goulds Pumps |

Magnetically driven (mag drive) centrifugal pumps have been in use since 1947 when the first magdrive pump was developed. Mag drives have always been the workhorse pump in applications with corrosive and often toxic fluid applications, and particularly over the last 20 years they’ve become more common in the chemical process industries (CPI). A typical mag-drive pump is comprised of a magnetically coupled rotor-and-drive assembly separated by a containment shell that hermetically seals pumpage from the atmosphere (Figure 1). The mag-drive pump’s key feature is a sealless design, which eliminates a mode of failure. This often makes it a strong solution for pumping applications with mechanical seal problems. The mag drive is commonly used to pump hazardous and high intrinsic value pumpage where the process cannot or should not be diluted by flush media (typical in a traditional mechanical-seal pump). Mag drives have many growing applications in global industries, such as petrochemicals in petroleum refineries, pharmaceutical applications, and pulp-and-paper mills, which employ caustic, acid and solvent services during production. However, this type of pump is somewhat underutilized in many of these industries due to common misconceptions…
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