Selection of flash steam valves in the alumina leaching process

2009-04-05View Original

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Medium: Saturated steam, containing alkali solution and AH slurry. Problem: The design institute specified the use of a pneumatic diaphragm eccentric valve with a DN300 size, linear type, and a torque of 200 N/m; however, over time, this valve became sluggish in its operation, until eventually the valve core got stuck and could no longer function. The valve manufacturer was contacted for disassembly and analysis; the main components inside the valve body were in good condition, but the part where the valve stem contacts the valve body was stuck. Later, a valve of the same type with a tension of 400 n/m was installed, but the results remained poor. Let’s discuss it.

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Selection of flash steam valves in the alumina leaching process

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