Is it necessary to install an exhaust valve at the highest point of the pipeline between the pump inlet valve and the pump? Why?
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Is it necessary to install an exhaust valve at the highest point of the pipeline between the pump inlet valve and the pump? Why? I seek advice from those who are more knowledgeable. This post was last edited by 156026692 on 2009-2-3 at 23:15.]
Not necessarily; generally, a vent valve is installed between the outlet valve and the pump. If the pipeline between the pump inlet valve and the pump is located above both the valve and the pump, it is advisable to install a vent valve. This setting is primarily intended to release the gas inside the pump and in the pipelines, thereby preventing the pump from being emptied and avoiding damage to it caused by cavitation.
Before filling with fluid, the pump body and pipes contain air or N2 inside. During the filling process, this gas needs to be removed. The highest points in the pipes are where gas accumulates last, and it must be expelled; otherwise, cavitation or fluctuations in outlet pressure may occur once the pump starts operating, affecting its proper functioning. During the liquid filling process, if liquid is discharged from the highest point, it indicates that there is no gas inside, and the valve at that highest point needs to be closed.
It is generally not necessary; this also depends on the type of pump and the way the piping is installed
Personally, I don’t think it’s necessary; generally, a decision is made based on actual needs to determine whether an additional exhaust valve is required. I personally agree with the idea from the second floor.
An exhaust valve must be installed at the highest point of the pipeline between the pump inlet valve and the pump; this is necessary for cryogenic pumps, but not required for normal-temperature water pumps. Please refer to floor 2! ! !
Generally speaking, if there is no piping above the pump inlet between the pump inlet valve and the pump inlet, it is not necessary to install a vent valve. If the pump inlet valve is located far away and the pipeline between it and the pump is at a higher level than the pump inlet, a vent valve should be installed.
This vent valve is intended to prevent gas from remaining in the inlet pipe, which could cause cavitation when the pump starts, but it is not necessary