A solution for scale removal case study

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Courtesy of HydroFLOW USA

The Brookfields Restaurant chain consists of three large eateries located in and around Sacramento, Calif. Like many others, Brookfields Restaurants were equipped with water softeners to control lime scale on their hot water equipment, which consists of hot water heaters, dishwashers, steamers, coffeemakers and espresso machines.

Even with the softeners, Brookfields Restaurants managers reported that flatware looked dull and did not appear clean. Both flatware and dishes were also covered with water spots, and employees regularly had to clean lime scale deposits from the stainless steel appliances. Owner Sam Manolakas was concerned that even though flatware and dishes were cleaned and sterilized, their appearance would cause customers to question their cleanliness. The restaurants triple-filtered their incoming water, but hard water problems persisted.

Alternative Options
Manolakas began to look for alternative methods that would save the costs of managing the 11,000 gal of water used in each restaurant per day. In December 2010, Green-HVAC Solutions, a California-based representative of HydroFlow Holdings-USA LLC, installed HydroFlow HS-48 water conditioners at each restaurant and shut off or bypassed their water softeners.

The systems do not use salts or chemicals; rather they apply an electrical field to the water and pipes that affects the ions in water that cause scale. The systems work via a Hydropath Signal, which travels throughout the water system at close to the speed of light and causes ions to form small suspended crystals in the water, rather than a mass of crystals on pipes or equipment. The electrical signal consists of highfrequency oscillations that gradually die away or decay, and then repeat at varying intervals.

Water can hold a certain amount of dissolved minerals. It becomes less able to hold minerals under certain conditions, such as when it is heated or when it experiences a drop in pressure. When this happens, scale begins to form on available surfaces, like the inside of a dishwasher or its contents. The Hydropath Signal induces an alternating electrical current in the water that causes atoms or molecules that have either a positive or negative electrical charge to combine and form crystals that are easily washed away by the water flow.

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