Application of Magnetic Flow Meters
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Application: Applications for dirty liquids are found in the water, wastewater, mining, mineral processing, power, pulp and paper, and chemicals industries. Water and wastewater applications include custody transfer of liquids in force mains between water/wastewater districts. Magnetic flow meters are used in water treatment plants to measure treated and untreated sewage, process water, water and chemicals. Mining and mineral process industry applications include process water and process slurry flows and heavy media flows. With proper attention to materials of construction, the flow of highly corrosive liquids (such as acid and caustic) and abrasive slurries can be measured. Corrosive liquid applications are commonly found in the chemical industry processes, and in chemical feed systems used in most industries. Slurry applications are commonly found in the mining, mineral processing, pulp and paper, and waste water industries. Magnetic flow meters are often used where the liquid is fed using gravity. Be sure that the orientation of the flow meter is such that the flow meter is completely filled with liquid. Failure to ensure that the flow meter is completely filled with liquid can significantly affect the flow measurement. Be especially careful when operating magnetic flow meters in vacuum service because some magnetic flow meter liners can collapse and be sucked into the pipeline in vacuum service --- catastrophically damaging the flow meter. Note that vacuum conditions can occur in pipes that seemingly are not exposed to vacuum service such as pipes in which a gas can condense (often under abnormal conditions). Similarly, excessive temperature in magnetic flow meters (even briefly under abnormal conditions) can result in permanent flow meter damage. |