The DESMI ROTAN® pumps are used for pumping of different sugar products from cane and beet juice to molasses and finished sugar solutions. The sugar products supplied direct from the sugar mill is chemically neutral whereas imported sugar products may contain small amounts of formic or sulphuric acid in order to prevent fermentation during transportation. Sugar products containing acid may cause corrosion in cast iron pumps so in some cases stainless steel pumps should be used. Sugar products have to be considered an abrasive liquid which is why the pump material has to be of wear resistant material. Viscosity of sugar products lies between 500 and 20,000cSt dependent on temperature and dry matter (BRIX). Therefore, it is recommended to pay special attention to the viscosity in relation to temperature when selecting a pump. Seal less pumps has been successfully used and to prevent bearing problems the pumps should be dimensioned to approximately 30 per cent of maximum speed.
By DESMI A/S based in Noerresundby, DENMARK.
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