What are the reasons why the liquid urine pump fails to generate pressure, or why the pressure drops significantly after the outlet valve is opened wide?
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What are the reasons why the liquid urine pump fails to generate pressure, or why the pressure drops significantly after the outlet valve is opened wide?
This post was last edited by Xinhu Shielded Pump on 2010-11-19 at 10:23. It’s likely that the pump has insufficient power; when starting the pump, slowly open the outlet valve – don’t open it completely, try keeping it partially closed! The gauge pressure parameter of the discharge pipeline should be greater than the pump’s design pressure plus the inlet pipeline pressure! I guess in your case the outlet pipe is too thick; with the valve fully open, the flow rate becomes excessive! So please try opening the outlet valve a little wider!
To reduce the unnecessary work caused by pressure losses in the pipelines, it is common to use a method of changing the diameter of the pipeline at the pump outlet during design, especially for long-distance pipelines. However, if the diameter change is too large, this problem can occur. Generally, if the pressure at the pump outlet is roughly equal to the designed head and still meets the required head value, then no action is needed; but if there is a significant difference, it is advisable to check whether the motor’s load can handle it.