Pump model: IH50-32-250A Flow rate: 12 m³/hr, Head: 60 meters Motor power: 7.5KW Rated current: 14.7A Actual inlet water pressure: 1.2 MPaG When the outlet valve is closed partially
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Why does the water pump trip? Is it because of the high water inlet pressure? What maximum pressure can a typical pump casing withstand? Is the mechanical seal related to the water inlet pressure?
Your inlet pressure is already 12 kilograms and the head is 60 meters – why do you still need to add another pump?
The pump outlet pressure is the head plus the inlet pressure; this factor is taken into consideration when selecting a pump
The outlet pressure requirement is 18 kilograms; since the inlet pressure is already 12 kilograms, a head of 60 meters was chosen. It was not taken into account that the inlet water pressure is relevant to pump design.
Initially, it was simply assumed that the discharge pressure equalled the head plus the inlet pressure, without considering the impact of the inlet pressure on pump design.
If the pump inlet pressure is provided to the pump manufacturer during pump selection, the problem lies with the manufacturer, as they may have chosen a pressure rating for the pump casing that is too low; if this information isn’t given to the manufacturer, then the manufacturer cannot be held responsible
It is our responsibility in this regard, but the manufacturer now says that the tripping was caused by excessive pressure of the incoming water. I wonder if that makes sense?
That’s right; it’s the high inlet pressure that prevents the outlet valve from closing, thereby restricting flow. The root cause of the tripping is an incorrect pump selection
The outlet valve can be adjusted. How should one make the selection? Does specifying the inlet water pressure change the pump selection?
You know, I already replied to that post for you, yet you keep asking. Don’t you read the posts? Since it hasn’t been provided to the manufacturer, just send the data to him; he knows how to make the choice. You just need to use it – you’re not pretending to be the owner when in fact you’re the manufacturer, are you?
I’m sorry, I don’t know what happened – the content got written in the title and the title got written in the content, so I posted it twice. Because the manufacturer claims that the high imported water pressure is the cause of the tripping, which involves issues regarding liability determination