Sulfuric Acid, being used for additional ph adjustment of white water and adjusting ph in waster water application for a long time, is used for removing secondary products in proceeding Elementary Chlorine Free and Total Chlorine Free, and used as a part of substitute of Aluminum Sulfate for a cost saved assistant of sizing agent in Acid paper making and of reinforcing agent in neutral paper making. Aluminum Sulfate of having a purpose of ph adjustment is easy to handle and very popular chemical, therefore it had been added roughly to pulp making application but the cost is 2 or 3 times higher than 98% Sulfuric acid and it can be easily targeted for cost saving. Large cost saving will be made by substituting a part of Aluminum Sulfate.<BR>Batch treatment is widely used for diluting Sulfuric acid but it should be changed to deeply considered safety method for human and environment as the application becomes wider. In meaning of safety method, we hereunder introduce our in-line diluting system.<BR>Feature of in-line diluting system is high productivity because of easily and quickly manufacturing of whatever concentration and volumes in whenever needed. Moreover, storage tank is not required and space is saved, besides effect on human can be avoided.<BR>Iwaki's Sulfuric dilution system has a unique design coming from various features being provided by pump maker. In-line mixing of using centrifugal pump was accomplished by using our own pump controller. Process time of the dilution becomes tremendously shorter and productivity becomes greatly improved. As the generated temperature varies by the concentration of dilution, we provide the best diluting method for each concentration for preventing the dilution from boiling and our using flexible tube absorbs heat expansion and contraction of piping. At the mixing point, siphon prevention function is employed and secondary safety function of checking valve failure is also employed. Besides, it also has a function of preventing convection caused by difference of specific gravity. For safety it has transparent plastic cover on piping units for accidental chemical spouting. Regarding system protection, our system has an alarm output in case of detecting flow rate variation (concentration change) , upper temperature limit (for piping protection) , upper and lower pressure limit (for piping protection) and abnormal works of motor driven valves (for piping protection) . Also our system as a protection program of stopping whole equipment in case of detecting a tripping of the pump inverter, thermal relay operation, wrong operation in manual operation and failure of sequence itself.<BR>Since we do whole system controls of not only pump but also control devices and mixing unit by our experience of various kinds of diluting, we are very proud of offering the one year warranty on whole equipment.