CWT .NC (DEWT .NC) Print
Written by PT. Chemical Mandiri Jaya   
Thursday, 05 November 2009 11:19


Powder/Liquid  compound of nitrite borate base with organic corrosion inhibitors.


  • To inhibit corrosion in all types of fresh water closed cooling system on structed of either ferrous or non ferrous metals, but where zinc is not used such as
  • Diesel engine cooling water system including those where cooling water is used as heating medium in fresh water generators.
  • Compressor cooling water systems
  • Central heating system etc.


  • Use with ferrous and non ferrous metal used in closed fresh water systems
  • Highly effective protection.
  • Non Chromate types avoids pollution problems associated with chromate based inhibitors
  • Compatible with all types of glycol based antifreezes.
  • Will not damage seals, glands, packings, hoses or synthetic materials
  • Simple control check and usage.


  • Determine the quantity of treatment required for  the system (see product dose)
  • Dissolve the product dose required in warm water. Do not exceed a solution concentration of 120 grams per liters (saturation point)
  • Solution should be added to system through dosage line or mixing tank.


  • Initial dosage recommendation for a newly filled system is 3.0 kilograms (CWT .NC powder) or 8 liters (CWT .NC liquid) per 1000 liters of water in the system
  • Subsequent dosage of Busol CWT .NC depend upon the nitrite value of the water in the system. This may be measured using a Nitrite Test Kit (obtainable from Busol CWT .NC ). The recommended normal Nitrite concentration value is 1000 to 2000 ppm NO2. Pitting corrosion may result if level drops below 1000 ppm and we recommended that nitrite levels in the system are maintained at approximately 1500 ppm (midrange)
  • Dosage quantities to bring low value to mid range are recommended to be calculated as follows:
  • Dosage amount in grams per 1000 liters of water is system = (1500 – measured nitrite value in ppm NO2) x 2
  • e.g. for & reading of 900 ppm, dosage amount = (1500 – 900) x 2 = 1200 grams per 1000 liters water in system.


Last Updated on Thursday, 15 April 2010 01:11