BT-77

Use sufficient BT-77 to achieve an ortho phosphate level of 30 – 60 ppm, and a sulfite test level of 30 – 60 ppm. Additional Sulfite treatment is required for low feed water tank temperature. The product should be added to the feed water tank for best results. No product mixing or dilution is needed, however, a day tank dilution system can be used if desired. Use the State Water Treatment test kit #113721 to test for product and boiler conditions. To measure ortho phosphate in the steam boiler use State Test Kit #124663. If the above tests are out of range on the low end, increase product usage. Perform bottom blow down at specified periods to remove solids accumulations. System TDS levels are determined by the quality of the fresh make-up water available. Generally, TDS levels should be maintained below 3500 ppm. Your State Chemical representative will review the water conditions for the boiler system and recommend a TDS limit for your system.