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For correctly starting a centrifugal fan, should the outlet be turned on first or the inlet?

2019-06-15View Original

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I’ve seen both types of operations; what are the correct steps?
Reply #22019-06-15
Open the outlet first, then the inlet, and use the inlet to control the flow.
Reply #32019-06-16
Is it wrong to use export controls on traffic? Why?
Reply #42019-06-17
I also want to know why the outlet was opened first

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