Closed Loop Treatment
Closed loop water treatment is a chemical treatment program used in recirculating closed systems such as chilled water, hot water, jacket water, and HVAC loops to protect equipment from corrosion, scaling, fouling, and microbiological growth.
Objectives
Maintain system integrity and performance by controlling corrosion, scaling, and biological growth in closed-loop systems.
Prevent corrosion
Prevent corrosion of steel, copper, aluminum, and alloys
Control scale formation
Prevents deposits that reduce system efficiency.
Maintain water quality stability
Ensures consistent chemical balance in the system.
Extend system life
Reduces wear and prolongs equipment lifespan.
Improve heat transfer efficiency
Keeps surfaces clean for optimal thermal performance.
Specialty Chemicals Used
A balanced chemical program tailored to protect and stabilize closed-loop systems.
Corrosion inhibitors
(nitrite, molybdate, phosphate, organic inhibitors)
pH buffers and alkalinity builders
Maintain optimal pH levels for corrosion control.
Dispersants
Prevent deposition and keep particles suspended.
Biocides (non-oxidizing)
Control microbial growth without system damage.
Passivation chemicals
Form protective layers on metal surfaces.
Applications
Used across various closed-loop systems in industrial and commercial environments.
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Chilled water systems
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Hot water heating systems
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Engine jacket cooling systems
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Process closed cooling systems
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HVAC closed loops
Minimal makeup water requirement
Low chemical consumption
Stable water chemistry
Reduced corrosion and leaks
Lower maintenance cost