Closed Loop and Chiller Water Treatment

It is the chemistry and monitoring that keep a sealed heating, chilled water or glycol loop from corroding and fouling. Because a closed loop has little make-up water, small volumes of inhibitor go a long way, and small leaks or top-ups can undo the program without anyone noticing.

Quarterly testing suits most loops, with more frequent checks after a repair, a top-up or a system flush. What matters is catching a change in inhibitor level, iron or biology while it is still small.

An open system such as a cooling tower loses water to evaporation, so it concentrates minerals and needs blowdown control. A closed loop should lose almost nothing, so the treatment focus moves to corrosion control, inhibitor levels and finding leaks or unrecorded top-ups.

Glycol degrades over time and turns acidic, which attacks the metal it was meant to protect. Testing for inhibitor level, pH and degradation products tells you whether the charge can be restored or should be replaced. We test and tell you which it is.

Yes, along with chiller barrel and evaporator circuits, fan coil and radiant loops, and glycol systems.

Yes. We review your current program and system records, propose a replacement and plan the changeover so the loop is never left unprotected.

Often not to get started. Most municipal utilities publish their treated water chemistry, and we use it with your system details. A sample from the loop itself is a different matter: for an existing system, testing what is circulating is usually the fastest way to see what has been happening.

Yes. Guardian specifies, installs and services softeners, filtration and chemical feed equipment as well as the chemistry, so one vendor handles the water from inlet to loop.

Send the form on this page or call (800) 661-6544. A Guardian water treatment specialist responds within one business day.