Why should the outlet valve be closed before starting a centrifugal pump? And the outlet valve should be opened before starting the vortex pump?
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This post was last written by guangbiao_He edited on 2009-7-31 08:42 Why should the outlet valve be closed before starting a centrifugal pump? And the outlet valve should be opened before starting the vortex pump?
When the centrifugal pump is turned on, all outlet valves must be closed. At this time, the motor current of the centrifugal pump is the smallest. When the vortex pump is turned on, all outlet valves must be opened. At this time, the motor current of the vortex pump is smallest.
The people above have already said it, so I have nothing to add.
The reason for the current load of the pump! Specifically, let’s talk about the second floor!
When the centrifugal pump starts, the flow rate is the smallest, and the starting current is the smallest, which is beneficial to reducing the pump starting current. However, the vortex pump is a positive displacement pump. If the outlet valve is not closed when starting, the pressure at the pump outlet will be very high, and in severe cases, the impeller of the vortex pump will be damaged.