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FOR COOLING TOWER LAY-UP AGI RECOMMENDS

COOLING LOOP GATOR®

 

Developed for seasonal, short-term or long-term lay-up, Cooling Loop Gator® from Cortec® Corporation protects enclosed spaces for up to 12 months. Once the bag and powder dissolve, the VpCIs (Vapor phase Corrosion Inhibitors) adsorb on all metal surfaces, reaching recessed areas and interior cavities.

 

DOSAGE REQUIREMENT:  1 bag treats 88 gallons system capacity

 

FEATURES

 

 

PROCEDURE FOR LAY-UP

Your customer may decide either to completely drain the system, drain the system back far enough into the building to protect from freezing, or to keep the system full and use sump heaters to prevent freezing. Whatever method is chosen, you will need to provide a procedure to protect the system.

 

STEP 1: PRE-SHUTDOWN INSTRUCTIONS

** Approximately 1 - 2 weeks prior to shutting down.

 

  1. DECREASE CYCLES

Decrease cycles to help purge any deposit-forming suspended solids. If adequate side stream filtration is provided, this step may not be as critical. If the last few weeks of operation are at extremely low load, increasing blowdown will help ensure that fresh inhibitor is in the system. This is especially true where chemicals are fed based on bleed or make-up water meter.

 

  1. INCREASE THE APPLICATION OF MICROBIOCIDE

Any biofilms-related microbial activity normally kept in check by the regular application of microbiocide may run rampant once the system is shut down and chemical feed discontinued. Increasing the use of antifoulant during this period will help to remove surface biofilms.

 

  1. OXIDIZING MICROBIOCIDE

Just prior to shutting down, the system should be slugged with an oxidizing microbiocide (BromMax® 7.1) at an equivalent residual of 10 - 20 mg/L free chlorine for 6 - 12 hours. We recommend using Towerkleen 142 –– 1 hour prior to adding BromMax® 7.1 –– to help eliminate any biofilms. Using oxidizing biocide will also help reduce the risk of Legionella amplification.

 

STEP 2: COOLING LOOP GATOR APPLICATION

  1. Remove and discard outer barrier bag.
  2. Add the water-soluble bags directly into cooling water.
  3. Recirculate treated water for about 10 - 12 hours to obtain good protective layer before shutdown.
  4. Either drain the water out (flushing lay-up) or leave treated water in cooling tower.
  5. After application, all internal surfaces should be covered or closed and valves shut off.

 

INTERMITTENT OPERATION


In some of the less frigid climates, cooling water systems must by on standby for those days where air conditioning is required. It is not unusual during the winter in some areas of the country to have several days dip into the thirties, followed by several days that may reach into the seventies. This type of intermittent operation can often be as difficult and frustrating as laying-up a system.

 

The following tips will help you deal with this difficult operation:

 

*** CONTACT YOUR AGI DISTRIBUTOR TO ORDER COOLING LOOP GATOR® ***

 

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