Material selection for circulating water pumps
Thread Content
TDS (ppm): 1051.2 Total hardness (ppm as CaCO3): 487.9 Calcium hardness (ppm as CaCO3): 175.0 Magnesium hardness (ppm as CaCO3): 312.9 Permanent hardness (ppm as CaCO3): 407.6 Temporary hardness (ppm as CaCO3): 80.3 Sodium ions (ppm): 172.5 Potassium ions (ppm): 27.4 Chloride ions (ppm): 292.9 Sulfates (ppm): 292.9 Sulfates (ppm): 155.0
Ordinary cast iron or cast steel materials can meet the requirements.
TDS (ppm): 1051.2 Total hardness (ppm as CaCO3): 487.9 Calcium hardness (ppm as CaCO3): 175.0 Magnesium hardness (ppm as CaCO3): 312.9 Permanent hardness (ppm as CaCO3): 407.6 Temporary hardness (ppm as CaCO3): 80.3 Sodium ions (ppm): 172.5 Potassium ions (ppm): 27.4 Chloride ions (ppm): 292.9 Sulfates (ppm): 144 Nitrates (*ao): 155.0 There was a mistake earlier; it contains both *ao nitrates and sulfates. I’m not sure if carbon steel is suitable for this. I have heard of chloride ions; when their concentration is below 1000 ppm, carbon steel is a better choice than stainless steel!
Engineering plastic pumps made from ultra-high molecular weight polyolefin materials are resistant to corrosion and wear, and are widely used in non-ferrous metal smelting and desulfurization processes. Such as desulfurization methods like the lime-gypsum method and the magnesium method.
If the level of suspended solids is not high, then it’s sufficient to choose a material that is resistant to acid and alkali corrosion, based on the pH level of the water; ordinary cast iron or cast steel will do, as no extremely high standards are required