Is the top of the sedimentation tank covered?
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Are the tops of everyone’s sedimentation tanks covered? Are there any benefits to being closed?
Does sealing still allow heat to dissipate? What you mean by sealing is preventing debris from falling in, and in that case wire mesh could be considered!
At present, the vast majority of newly installed units are sealed and purged with nitrogen. The on-site environment is somewhat better and meets the relevant regulatory requirements