Water Valley offers a diverse range of multifunctional cooling tower system inhibitors designed to provide comprehensive protection against scale, corrosion, and fouling. Our advanced blends include specialized inhibitors for steel, copper, and brass, along with polymer dispersants to prevent fouling. These powerful treatments effectively inhibit scale formation and corrosion while ensuring optimal system performance. Notably, our products are free from bromine precursors, making them a safe and efficient choice for your cooling tower needs.
Water Corrosion or Scale Deposition Tendency
In 1936, Professor Langelier’s groundbreaking research established the conditions under which water is in equilibrium with calcium carbonate. This work made it possible to predict whether a given water sample is likely to precipitate or dissolve calcium carbonate. As a universal solvent, water naturally seeks equilibrium (0.0 LSI). When out of balance, it can become corrosive or scale-forming. For example, in swimming pools, water with a low Langelier Saturation Index (LSI) of -0.5 or below can draw calcium from the plaster lining the pool walls. Similarly, in industrial systems, it can erode protective coatings on pipework. Conversely, when water is oversaturated (e.g., >0.5 LSI), it becomes scale-forming.
The Langelier Saturation Index (LSI) measures the relationship between the actual pH of a water sample and the pH at which it is just saturated with calcium carbonate (pHs). It is calculated as LSI = pH – pHs. However, the LSI calculation has limitations. Two different water samples—one with high hardness (scale-forming) and the other with low hardness (corrosive)—can theoretically yield the same LSI due to the influence of pH, alkalinity, and temperature on the calculation.
To address this, the Ryzner Stability Index (RSI) was developed. The RSI provides a more refined distinction between water samples by incorporating actual operating results from waters with varying LSIs. The RSI is calculated as RSI = 2 x pHs – pH. This index offers a more accurate assessment of water’s tendency to corrode or form scale, making it a valuable tool for water treatment and management.
Water Corrosion or Scale deposition tendency
Professor Langelier’s research, complete in 1936, defines conditions in which water is balanced with calcium carbonate, making it possible to predict the likelihood of a given water to either precipitate or dissolve calcium carbonate. Being the universal solvent that it is, if water is out of balance, it will seek to find its own equilibrium (0.0 LSI.) in the case of swimming pools, water can even draw calcium out of the plaster that lines the pool walls, or in industrial systems draw from the protective coating on pipework at an LSI of -0.5 LSI and below. In the case of over-saturation eg. >0.5 LSI the water will become scale forming.
The relationship between the actual pH of a water sample and the pH at which it is just saturated with calcium carbonate (pHs) is called the Langelier Saturation Index (LSI) and is equal to (pHs – pH).
However, the way in which the LSI is calculated, two different waters; one having high levels of hardness (scale forming), and the other with low level of hardness (corrosive) could theoretically have the same Langelier Saturation Index (LSI) due to the effects pH, Alkalinity and Temperature have on the calculation. For this reason we reach for the Stability index developed by Ryzner (RSI) which goes further and distinguishes between two waters based on an index of actual operating results with waters of various LSIs.
The RSI pf water is calculated by: 2 x pHs – pH
Cooling tower system inhibitors
Our most popular Biocides & Disinfectants
Cooling Water Dispersant Products
Water valley range of cooling tower dispersants are highly effective at removing fouling by microbiological slime and are best incorporated into a treatment regime with a biocide such as chlorine or bromine for cleaning cooling towers to ACoP L8 standard.
Accepta recommends incorporating the Bromgard cooling system treatment range which brings together the latest scale, corrosion and fouling control technology with the biocidal power of bromine for applications in the widest possible range of cooling water systems
Foam Cleaning
For cooling towers where pack removal is too difficult our Foam Cleaner may be suitable, the high cling foam gives a deep clean disinfecting and descaling lightly fouled tower packing.
The high-cling foam cleaner includes acid products for descaling and alkaline products for removing organic fouling and general soiling. We have also incorporated , our patented chlorine dioxide system to provide powerful surface disinfection and biofilm removal, incorporated together these products offer exceptional cleaning power which is why our foam clean is used by extensively by cooling tower cleaning teams across the globe and abroad