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Use WS® 8640 is a synergistic blend of maleic acid polycarboxylates and organic sequestring agents of ATMP type. It is recommended for deposit inhibition in industrial water systems like recirculating cooling systems, cooling towers, waste water streams facing deposition problems etc. Almost mineral scales can be inhibited by WS 8640 like Calcium Carbonate, Fe and Mn based scales, CaF2 etc. Technical characteristics WS 864X' products have been designed to protect unstable cooling water systems. It is a mater of new generation chemicals. We characterize as unstable the cooling systems, where the cooling load fluctuates more than 25%, betweeen minimum and maximum yearly operating. Normally such a system presents low inertia to absorb those load variations, and additionally the total water volume is low ( normally below 500 cubic meters). The unstable systems are normally operating in elevated pH, high concentration factor. Common problems are hard scale deposition, moderate corrosion, frequent acid cleaning requirements, microbiological control upsets. Features WS® 8640 is a very concentrated, synergistic blend resulting in low dose rates and normal use cost. It is chlorine stable, but not Chlorine Dioxide resistant. Under such conditions WS 8641 should be preferred. WS® 8640 is suitable for use in waters containing high solids amounts. WS® 8640 has low Phosphorous content, making its use acceptable in environmentally sensitive areas. feeding Continuous feeding at 5-25 ppm of WS® 8640 is recommended for most applications. However, optimum dosage will depend on the nature and severity of fouling and the operational parameters of the cooling system. WS® 8640 is an acidic material and therefore corrosion resistant feeding equipment should be used. When application occurs to unstable or load fluctuating cooling water system, analog feeding device is recommended. Application limits WS® 8640 can be freely used under extremelly severe and difficult operationg conditions, in hard or soft, city, ground or surface or even in recycled waste water, in pH values up to 9,4, hardness presence up to 2000 ppm as CaCO3, and specific conductance above 15000 microsiemens. Under such extremely condititons, please contact us as to define the proper application dossage. Contact Information
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