Proper treatment and maintenance of closed loops (hot or chill water) are an AWT strong point. Our recommended products are formulated to keep closed systems clean and passivated for adequate corrosion protection. The recommended Products can recommend a treatment program tailored especially for your needs and situation. AWT Products have the ability to diagnose potential problems (biological or other system contamination problems) that could determine how well your closed loop operates. In maintaining a clean system, there is less downtime for system repairs, pump seal replacements, and cleaning of heat exchanger equipment. The AWT Specialist also has the expertise and training to maintain old closed loop systems that may not have been treated properly in the past. Side stream filtration, system pre-treatment, and on-line closed loop clean-up are methods available to ensure your closed loop operates at peak efficiency.

And Pays close attention to the chemistry of closed loop recirculating water systems because corrosion and microbiological fouling can severely impact heat exchange even in systems experiencing very little water loss. If left unchecked, corrosion activity and bio fouling can drastically shorten the useful life of piping, valves, and heat exchangers in a closed loop water system.

Closed loop systems are designed to distribute heated or chilled water throughout a designated area. Water temperatures in closed loops typically range from 42°F to 350°F and water velocities are usually two to five feet per second. Process water loops, however, can experience temperatures as high as 450°F and velocities of ten feet per second. Most closed loop systems contain several different types of metals including mild steel, cast iron, copper, brass, and aluminum. A water treatment approach for closed loop systems must take into consideration all of these factors.
An effective closed loop treatment program requires corrosion inhibitors, scale control agents, and micro biocides