pH Control Systems
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چکیده
pH SENSOR The final control element can be a pump or an ON/OFF valve. Sizing of the final control element is complicated and depends on many factors. This is one situation where a titration curve can be invaluable. In many cases, it may be necessary to use two final control elements, each delivering different amounts of chemical and having different setpoints. For example, one valve may deliver 1 GPM of caustic below 3 pH and another may deliver 0.1 GPM of caustic below 4 pH.
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