3.3 Continuous blowdown involves continuously removing a portion of the boiler water to control TDS and prevent scaling.
For high-pressure boilers (above 600 psi), standard softening is insufficient. RO systems and mixed-bed demineralizers remove up to 99% of all dissolved minerals, including silica, producing ultra-pure water. Thermal Deaeration practical boiler water treatment handbook pdf
Oxygen causes severe pitting corrosion in metal surfaces, even at incredibly low concentrations (parts per billion). practical boiler water treatment handbook pdf