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Boiler Water Treatment FAQ

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  1. What should I do when I have a feedwater hardness upset?
  2. What are the highest levels of feedwater impurities suggested for my system?
  3. What are the proper regenerant levels for a sodium zeolite softener?
  4. When utilizing neutralizing amines, what pH should I maintain in my condensate?
  5. How should I address boiler water carryover?
  6. What are the proper operating parameters for a boiler operating at a certain pressure?
1. What should I do when I have a feedwater hardness upset?
  1. Increase the level of dispersant fed.
  2. Reduce the boiler water conductivity.
  3. Increase the number of bottom blowdowns.
  4. Identify and eliminate the cause of the hardness excursion as soon as possible.
2. What are the highest levels of feedwater impurities suggested for my system?
Please see the ASME Guidelines listed on our site.
3. What are the proper regenerant levels for a sodium zeolite softener?
Softeners can be regenerated with between 5 lbs and 15 lbs of salt per cubic foot of resin, depending on the run lengths desired. However, in order to achieve sufficient regeneration of the resin, a 30 minute contact time with a brine solution of 8 – 10% is recommended.
4. When utilizing neutralizing amines, what pH should I maintain in my condensate?
  1. In high purity, mixed metallurgy systems, condensate corrosion is minimized at a pH of 8.8 – 9.2.
  2. In low pressure systems, with high raw water alkalinity, some plants opt to maintain pH levels at 8.3 to reduce costs.
  3. In either case, condensate samples must be cooled prior to sampling in order to prevent flashing of the CO2, and artificially high test results.
5. How should I address boiler water carryover?
Please see our technical tip on Boiler Water Carryover and its Causes.
6. What are the proper operating parameters for a boiler operating at a certain pressure?
Please see the ASME Guidelines listed on our site.
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