What material should be used for high temperatures, acidity, and high solid content?
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There is a control valve in the process. The operating conditions are: temperature of 130 degrees, pH value of 3–5, and solid content of 20–30% (by volume). The liquid mixture contains sodium chloride, magnesium chloride, magnesium sulfate, etc.; the solids present are mainly sodium chloride and magnesium sulfate monohydrate particles. I would like to ask everyone: What material should be used for the control valve under these operating conditions? Currently, 316L material is being used, but its service life is only 2-3 months.
What is the pressure difference? How about using a PTFE-lined valve?
What is the pressure difference? How about using a PTFE-lined valve?
Contains solid particles; the valve seat and valve core are made of Stellite through surfacing
Austenitic stainless steel is still not as good as carbon steel in dilute acid environments. The solid content should be 20-30%; rubber-lined or diaphragm valves are definitely not suitable. It is recommended to consult better manufacturers of control valves, such as KOSO in China, as well as imported valve manufacturers.
Soft seals don’t work well; they wear out. Generally, metal materials are not corrosion-resistant. What model of control valve is being used now?