Outlet pressure of the centrifugal pump
Thread Content
Under normal circumstances, the outlet pressure decreases as the outlet valve is opened wider. However, in some centrifugal pumps connected to atmospheric pressure tanks, the outlet pressure remains constant once the pump starts running; regardless of whether the outlet valve is open to a large or small degree, the outlet pressure does not change at all. Please help find a solution.
It’s the pump inlet flow that is restricted; there’s little pressure drop at the outlet valve.
The pressure gauge at the pump outlet is broken.....
1. The outlet pressure gauge is broken. 2. The pump selected is too large. 3. The outlet pipeline is blocked. 4. Clogged inlet pipeline. 5. There is a problem with the outlet valve. 6. It can’t be that it’s out of power, right? Hehehehe......
2. The pump selected is too large. The outlet has always shown a lower outlet pressure loss value. . .
Agreed, the pump selected is too large, or the pressure gauge is broken
As the liquid level in the tank drops, the inlet pressure of the pump should also decrease, and so will the outlet pressure
First, confirm whether the outlet pressure is normal; whether it is high or low has different causes； Check as well what the static pressure at the outlet is; it might have an impact. Logically, the liquid level in a tank at atmospheric pressure does affect the outlet pressure, depending on the static pressure difference ； The most likely possibilities are a faulty pressure gauge or a clogged pressure conduit; actual cases and diagrams would make it more specific
Solve? Correct answer: No solution. Pay close attention to the entire process; take your time. Keep in mind the conservation of mass and the conservation of energy.