Specifications include, but are not limited to: 1. HOH C-457 or C-7401 Alkaline Cooling Chemical or Equal To HOH C-457 or C-7401 Alkaline Cooling Chemical is a highly concentrated liquid formulation that addresses all aspects of corrosion and deposit control in HVAC and process cooling water systems. C-457 or C-7401 employs state-of-the-art stabilized phosphonate technology yielding significantly improved high temperature hardness stabilization. C-457 includes benzotriazole, a highly efficient corrosion inhibitor for copper and its alloys. The polymer stabilized phosphonate technology employed is designed to control calcium carbonate, CaCO3, scale and sludge in cooling tower water with up to 1200 ppm of hardness as CaCO3. If higher levels of hardness must be stabilized, sulfuric acid may be used to safely allow maintenance of 4000 ppm of hardness or more. C-457 or C-7401contains two polymeric dispersants designed to suspend captured air-borne debris, hardness precipitates, iron oxide, and organic debris. Good particulate dispersion is critical in controlling sludge and sediment accumulation in cooling towers. This is especially true where cooling water remains in a system over an extended period of time due to very slow turnover. 2. H O H A-215 or Mayosperse 770-15 Micro-Biocides or Equal To HOH A-215 or Mayosperse 770-15 Micro-Biocides is a non-oxidizing, broad spectrum, cationic microbicide ideal for controlling algae, bacteria and fungi in open recirculating cooling water systems. A-215 Mayosperse 770-15 is highly efficient and cost effective in controlling bacterial slime formers, algae and fungi that commonly produce fouling deposits in cooling towers and related heat exchange equipment. A-215 Mayosperse 770-15 contains 15% polyoxymethylene (dimethylamine) ethylene (dimethylamine) ethylene dichloride. A-215 is totally water miscible and is not sensitive to water hardness. The U.S. EPA recognizes A-215 Mayosperse 770-15 as an anti-microbial agent for use in open cooling water systems, industrial air wash systems, and decorative fountains that do not contain fish, EPA Reg. No. 1448-212-12479. A-215 is best used where the pH of the recirculating cooling water is below 9.5. A-215 is compatible with most oxidizing and non-oxidizing biocides, corrosion inhibitors, anionic polymers and phosphonates used for cooling water deposit control. A-215 is well suited to work with and enhance the action of chlorine and bromine-based biocides such as Chemicals DF-125 and BromiCide-T. 3. H O H A-615 Micro-Biocides or Equal To HOH A-615 Micro-Biocides is an EPA approved, broad-spectrum microbicide, effective over a wide pH range for use in cooling towers, air washers, and closed recirculating water systems. A615 controls bacteria, algae, and fungi at very low active levels (1 to 2ppm), without the development of resistant strains. A-615 consists of a 1.5% aqueous solution of mixed isothiazolins, EPA Reg. No. 707-133-12479. A-615 is especially effective in controlling slime forming bacteria responsible for the formation of biofilm (mud) on heat exchange and other cooling system surfaces. A-615 is highly effective in controlling sulfate reducing bacteria and other organisms responsible for microbiologically influenced corrosion (MIC). A-615 is also very effective in controlling nitrogen cycle bacteria responsible for nitrite loss in closed recirculating water systems. A- 615 kills micro-organisms by rapidly inhibiting the synthesis of the large, long chain molecules essential to the formation of protein, genetic transcription, and cell wall development. 4. HOH CS-39P or Equal To HOH CS-39P is a buffered, nitrite-closed system treatment containing organic and inorganic corrosion inhibitors for use in hot water boilers, hot and chilled water systems, engine jackets and other closed water systems.
