No pressure at the centrifugal pump outlet
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This post was last edited by Catalyzing a Grain on 2018-4-23 at 15:02. Yesterday, one centrifugal pump stopped working; after waiting for several hours, the temperature in the outlet pipeline became extremely high, high enough that it was impossible to put one’s hand inside it. The outlet pressure of this pump is 0.7 MPa; will it rise to the corresponding saturated vapor pressure at 170 degrees as the operating temperature increases?
At the outlet of a centrifugal pump, the water in the outlet pipeline should be in a dead zone; why does it rise along with the liquid inside the pump casing?
Is the heat pump circuit turned off? Leakage inside the inlet/outlet valve?
The outlet valve is closed; it’s frozen behind it. No heat pump wire
By \"not pumping,\" does it mean the pump is not running, or that it is running but not producing any flow?
The pump operates, and the work it does must be transferred; it is converted into heat energy, which causes the pump body and the medium inside the pump to heat up.
When the outlet valve is closed, the impeller continues to rub against the liquid, causing the temperature of the medium to rise.
The pump is running, so why does the temperature in the outlet dead zone rise?
This post was last edited by ybcity on 2018-4-25 at 20:44. The description of the phenomenon is incomplete; only the high outlet temperature is known. What are the import and export pressures as well as the import and export flows at this time? Possible reasons: 1. There is air inside the pump, causing the material to circulate within it instead of being actually transported out, which results in a high outlet temperature. 2. The inlet flow rate is too low, preventing the material from being transported out and leading to its circulation within the pump, thus causing a high outlet temperature. 3. The pump blades are damaged or the sealing performance has declined, resulting in leakage of the material inside the pump and causing it to circulate there, hence a high outlet temperature. 4. The motor is running in reverse, which causes the material to circulate within the pump and leads to a high outlet temperature
When the outlet valve is closed, friction between the impeller and the liquid causes the temperature to rise, which may ultimately lead to cavitation.