Valve material
Thread Content
For valves used in high-temperature saline water, what materials are generally used for the valve core and valve stem?
It is necessary to make a comprehensive judgment based on parameters such as the concentration of chloride ions, the temperature of the medium, and the pH value of the medium. The desalinated water that has undergone electrodesalination also has a relatively high salt content; its pH is neutral, and the temperature is around 140°C. It’s fine to use carbon steel valves in this case – the valve discs are made of carbon steel as well, the sealing surfaces are made from Stellite through surfacing, and the valve stems are made of Cr13.
This post was last edited by At the foot of Hengshan Slope on 2017-1-25 at 11:39. For lower temperatures, fluorinated lining valves can be used; for higher temperatures, ball-milled valve bodies with Stellite alloy welded onto the sealing surfaces can be chosen, as this provides resistance to salt corrosion.
Valve body: Chinese standard 15crmo, American standard A182-F12; Sealing surface: Stellite; Valve stem: Cr13
It is recommended to use duplex stainless steel 2205 or 31803