The light division of Crompton Greaves Ltd. is the biggest manufacturer of lamps in India, located in Gujarat.
In the production there is cooling for various processes required. They are using bore well water with a high content of calcium carbonate and TDS.
A Reverse Osmosis System is installed to reduce the TDS from the water prior the use in the cooling system.

In spite of the heat exchangers for the compressor cooling and a jacketed vessel, formed a lot of scale. Which reduced the performance in the machines.
At least every 3 month cleaning of the heat exchanger was required. The vessel jacket, has to be chemically cleaned at least every 6 month.

Merus was installed ahead of the cooling tower, where a lot of algae could be found. Also Merus rings were installed ahead of the heat exchanger for the compressor and at the inlet of the jacket of the vessel.
Only a few days after the installation at the blow down of the jacket from the vessel it could be seen , how much scale was automatically washed out.
The performance of the compressor was stable and when opening the heat exchanger by routine after 3 month, the scale was almost totally gone. All the heat exchanger tubes are totally clean, there was no cleaning  required as before, just washing the surfaces. The result at this heat exchanger is now stable for more than a year. Even the customer has decided not to use the RO anymore, they use nowadays the bore well water direct to feed their system.
The algae at the cooling tower are gone, only little spots can be found today. The customer is not adding any chemicals to their system either, which leads to even more savings. The ROI(return of investment) of this installation was about 2 month. See as well enclosed certificate.