What are the emergency measures to take if signs of cavitation appear during the normal operation of a centrifugal pump?
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Dear technicians, if signs of cavitation appear during the normal operation of a centrifugal pump, what are the emergency measures that can be taken? If it is known that gas has entered the pump, in addition to venting the air at the pump body, is it also necessary to vent the air at the pump outlet? Please :)
What is discharged is actually the gas at the pump inlet. Or, when there is not much air in the pump inlet, reduce the valve at the pump outlet to maintain the pressure at the pump outlet, thereby slowly removing the air from the pump inlet. There are also cases where the pump inlet pipe gets blocked, and in such situations we use the medium for backwashing.
There are several locations where we can perform drainage: 1. the pump inlet filter, 2. the pump outlet； The most important thing is to prevent the pipeline from being emptied: (Install interlock devices: either a low liquid level interlock or a low current interlock can be used, with the latter being easier to implement.)
Inside the pump, the inlet pipeline and the return pipeline need to be emptied; otherwise, air will be drawn into the pump
Uh, I understand, sir. Last time, one of the pumps in our system lost pressure; they also vented at the outlet, saying that’s how they could remove all the air completely. I’m thinking that if there’s no air inside the pump body, but only air in the outlet line, the pump should be able to expel that air, and it shouldn’t prevent the pump from delivering fluid
Okay:handshake
Well, I also think that as long as the pump chamber is filled without any air, that’s sufficient
Yes, the key is to ensure there is no air in the pump chamber