PSA programmable valve issues
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Teachers, is the operation of the PSA programmable valve related to feedback? Does the sequential control mean that valve A operates first, and its feedback is sent to the DCS before valve B operates?
Sequential control usually works this way: the second action can only begin after the first one is completed. Of course, this depends on the design.
Is that PSA programmable valve controlled sequentially or by time?
Sequential control involves performing actions in sequence based on conditions (including time)
Both must meet the conditions simultaneously to proceed to the next step
The last edit to this post was made by huwei19890613 on 2018-7-1 at 10:11. PSA valve control is a sequential control process that operates in a predetermined order; step transitions are achieved by opening and closing the valves. This sequential control process repeats periodically, and under special circumstances, the valves must act in a specific sequence (usually to prevent gas leakage). Refer to https://bbs.hcbbs.com/thread-1649335-1-1.html
It is a combination of time control and condition control, aimed at preventing high voltage from affecting low voltage and causing system disruption. You can consult your manufacturer; the PSA process is very mature, and it’s always the same approach.