When shutting down a jet pump, should the steam valve be closed first or the extraction valve? What is the reason for this?

2020-07-19View Original

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When shutting down a jet pump, should the steam valve be closed first or the extraction valve? What is the reason for this?

Reply #22020-07-19

Close the exhaust valve first, then stop the steam. If it’s reversed, the vacuum might decrease again.

Reply #32020-07-22

We are secondary vacuum jet pumps with liquid ring pumps. When shutting down the pump, close the isolation valve for the air connection between the upstream vacuum tank and the pump, then shut off the steam valve of the steam injector, and finally shut off the jacket steam valve of the steam injector. Otherwise, it reverses in a vacuum.

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