Hot & Cold Closed Loop Systems
Hot water, chilled water, tempered water, process water and glycol filled closed loops are not always given enough consideration in a water treatment program, which can be a costly mistake! Closed loops that are not properly treated can cause significant corrosion damage. Closed loops that are leaking can waste water and energy while causing corrosion. These systems must be checked on a regular basis to confirm proper treatment level and system integrity. We have the product line and technical expertise to recommend the appropriate treatment for the metallurgy in any closed loop system and monitor it after treatment is applied.
Heating Water Loops
Hot water closed loop heating systems at times are heated by high efficiency boilers with aluminum heat exchangers. These aluminum heat exchangers cannot tolerate the high pH levels created by common closed loop treatment products.
Special corrosion inhibitors for these systems must be incorporated to protect these heat exchangers and the rest of the system metals from corrosion. It is critical to take into consideration the type of metals of composition in a system in order to treat them properly and avoid any failures.
Chilled Water Closed Loops
Chilled water systems require treatment to prevent corrosion of the metals within the system. The most common metals are steel, copper, and copper alloys. If the copper is allowed to corrode, the copper ions in the water quickly plate out on the steel in the system, causing galvanic corrosion of the steel. Our formulations are specific to the components of the system. In addition, chilled water loops are susceptible to microbiological fowling and must be treated with the proper biocide.
Process Water Closed & Open Systems
Process water (closed and open system) often have the same treatment requirements and greater potential problems than both chilled and hot water closed systems. After evaluating the process, we often will recommend the appropriate filtration as an additional means of maintenance.
Glycol solutions are frequently used to fill closed systems that might have potential for freezing, SCI recommends that only inhibited glycol fluids be used in these systems. Trying to treat uninhibited glycol with conventional closed loop inhibitors will NOT provide adequate protection from corrosion in these systems.
The glycol must be maintained at the appropriate level, (usually at 40 percent of the fluid) to provide adequate protection from corrosion and freezing. Low glycol levels can also allow microbiological growth and corrosion that can quickly cause damage to the system. So often, glycol systems are forgotten about and neglected.
Our program includes regular testing of these systems to insure they are properly maintained. Special glycol feeders are used to add fluid to the system when needed.