Problems with fixed balls and floating balls?
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The EOD unit I work at uses floating ball valves on the EO feed pipeline. EO tends to polymerize, which increases the pressure difference and can prevent the valves from opening; in such cases, it’s necessary to remove the flanges in order to relieve pressure. I was wondering whether using fixed ball valves would be a better solution Forget about adding balance valves or drain valves (whatever); I’m just wondering if a fixed ball valve will work?
This post was last edited by xlxuiin on 2015-6-10 20:12. It should work. The characteristic of a floating ball valve is that the medium pressure acts directly on the valve ball and the valve seat, while in a fixed ball valve, the pressure acts only on the axis of the valve ball, with the sealing surface experiencing only preload pressure
The effect is the same. There’s no need to switch to a fixed ball. Unless it’s large-caliber.
Is it because the material inside the pipeline has self-polymerized and cannot be opened? My analysis: For self-agglomerating materials, there are solutions for the design of the valve seat. The valve seat is particularly long, and there are several seals behind it to prevent intrusion and subsequent swelling. EO or low self-polymerization – polymers are really hard to deal with. . .
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