Explanation of dry gas seal control system requested
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The flow diagram of the dry gas seal control system for a compressor is shown in the figure. Please help to take a look – how does the pressure difference control valve function in this diagram? Is it used to control the pressure difference between the primary gas and the guide vane seal, as well as the pressure difference between the guide vane seal gas and the flare gas?
From the diagram, valve A controls the first stage, while valve B controls the flow to the flare.