HVAC and cooling systems run around the clock in wet, chemically treated, and hard-to-reach conditions. Treated water, constant moisture, condensation, and microbiological growth attack cooling towers, chiller tube sheets and water boxes, ductwork, and air handlers, while moisture and dust erode fan blades and dissimilar metals set up galvanic corrosion. The result is thinning metal, leaks, poor heat transfer, higher operating costs, and unplanned outages. Replacement is expensive and slow, welding thin sections risks distortion, and hot work is often restricted in occupied buildings and live plants.
Inside a typical HVAC system, treated water moves through cooling tower pans and trays, chiller heat exchangers, and piping, while humid air and condensation move through air handlers and ducts. Where these meet steel, galvanized surfaces, copper tubes, and insulation, the damage builds over time: pitted tube sheets, perforated pans, failed seams, corroded duct interiors, eroded fan blades, and insulation that has taken on water.
Belzona repair composites and polymeric coatings rebuild lost metal, seal leaking joints, and protect surfaces from further attack. They are cold-applied, so many repairs can be made in place, without hot work and without removing equipment, which can mean less downtime and a repair aimed at the cause of the problem rather than a temporary patch.