High-speed pump startup
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I read in the documentation that the outlet valve should be slightly opened when starting a high-speed pump. Why is it necessary to open the outlet valve during startup? I don’t quite understand it; please explain, extra points available
Otherwise, it will be very difficult to open your outlet valve, as the pressure difference between the front and back is too large. . . . .
The outlet pressure of high-speed pumps is usually quite high, making it difficult to open the outlet valve once the pump is running. If the outlet valve cannot be opened for an extended period, it will cause cavitation in the pump, leading to damage to the pump.
What is the typical outlet pressure of high-speed pumps?
What is the minimum outlet pressure for a typical high-speed pump?
The outlet pressure is related to the pump; those working in the chemical industry should not use vague terms such as \"approximately,\" \"possibly,\" or \"estimated.\"
Come and address this issue by analyzing each type of high-speed pump. What are the values determined for the outlet opening of different pumps? In other words, without data, the issue cannot be resolved; so I leave it to you to answer this question. First, provide us with details on one high-speed pump, along with its key parameters, and indicate what the corresponding outlet opening is
I agree with the views of those above; low flow rate and high head are typical characteristics of high-speed pumps. In addition to the points mentioned by the expert upstairs, due to the high-speed rotation, if the valve is tried to be opened after the pump starts operating, it may open slowly or not at all; as a result, the medium being transported stirs back and forth inside, causing the temperature to rise rapidly. Under such conditions, the medium is very likely to vaporize, leading to cavitation and potentially damaging the pump
Seen from the 9th floor – that’s correct. A passing student learned it
A minimum flow line can be added at the pump outlet and connected to the tank at the pump inlet, provided that the process conditions permit it. The minimum flow line should be activated before starting the pump; once the pump is running, bubbles that form for various reasons can be discharged through this line, thereby preventing the pump from running dry. High-speed pumps are equipped with impellers that help to reduce the effects of cavitation.