Magnetically driven pumps are not a new technology, but for process applications requiring sanitary pumps to transfer low-viscosity fluids, the pump of choice has been a traditional direct drive centrifugal pump. However, one manufacturer is beginning to develop magnetically driven centrifugal pumps designed specifically to address modern challenges in hygienic applications in industries such as food and beverage, dairy, and pharmaceutical. This type of pump could be used in a dairy plant for a pasteurizer or ultra-high temperature (UHT) system, in a juice or beverage plant for supply or transfer, or in a clean-in-place (CIP) system as a CIP supply pump. As they strive to improve operational efficiency and reduce capital expenditure, process plant managers must minimize downtime due to maintenance—whether planned or unplanned. At the same time, these individuals must implement technologies that enhance operational performance in these challenging applications. As a result, many in the industry are looking with considerable interest to magnetically driven pumps.
With no mechanical seals to replace or maintain, these pumps provide a cost-effective option for hygienic applications.
01/19/2016
Image 1. This magnetically driven centrifugal pump is designed specifically to address modern challenges in hygienic applications. (Courtesy of SPX)
This pump design also eliminates the need for water flushing, so the pumps do not need the pipes, valves, instrumentation and control systems required to manage the flushing process. This results in lower installation costs.
Although used throughout the industrial sector, one concern that has been associated with industrial magnetically driven pumps is heat generation. These pumps, however, have been engineered to eliminate heat buildup. The surface through which the magnetic field runs is composed of silicon carbide material, which allows the magnetism transfer to occur without any interference that creates heat. Unlike industrial magnetic pumps that have the magnets running on the outside, this design's magnets are on the inside of the shaft and impeller, much like those in traditional sanitary centrifugal pumps.