Boiler water parameter, boiler water parameter limit

Boiler Water parameter limit is given below:

Hardness as CaCO3 -- Not detectable

Sodium Sulphite as NaSO3 -- 30 to 70 PPM

Sodium Phosphate as Na3PO4 -- 50 - 100 PPM

Caustic alkalinity as CaCO3 -- 350 PPM min

Hydrazine as N2H4 -- 0.1 to 1.0 PPM

Total alkalinity as CaCO3 -- 1200 PPM max

Suspended Solids-TSS -- 50 PPM

Dissolved solids-TDS-- 3500 PPM max.

Silica as SiO2 -- less than 0.4 of the Caustic alkalinity