How is pressure controlled when switching between the main and standby rotary vane blowers?
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The Roots blower is used to discharge the purified gas externally. Due to high bearing temperatures in the main unit, it is necessary to switch to the backup unit; however, there are no connection pipes between the inlet and outlet of the backup unit. Under normal operating conditions, it is uncertain whether it is possible to switch to the backup unit and whether the pressure can be kept within the specified limits. Let’s discuss it
Reference method: 1. Open the small circulation valve between the inlet and outlet of the standby unit； 2. Start the backup unit (at this point, the fan is operating in small-cycle mode) ； 3. Open the main pipeline valve of the standby unit ； 4. Open the main unit’s small circulation valve and close the standby unit’s small circulation valve simultaneously, while monitoring the pressure in the main pipeline until the main unit’s small circulation valve is fully open and the standby unit’s small circulation valve is fully closed ； 5. Close the main pipeline valve of the host machine ； 6. Shut down the host. Note: The small-cycle operation time for ordinary units should not exceed 5 minutes, as in a small-cycle mode the gas is repeatedly introduced from the outlet to the inlet, and repeated compression leads to high inlet gas temperatures. I hope this method can serve as a starting point to inspire further discussion; everyone is welcome to share their thoughts.
The primary and backup hosts of regular users are both connected to the system, controlled by valves. All you mentioned is shutdown; the machine has been moved