Regarding the knocking sound in the pipeline ahead of the control valve
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Regarding the knocking sound in the pipeline ahead of the control valve, is it caused by the flow rate changes resulting from the automatic adjustment of the control valve, which in turn leads to water hammer noise?
Personally, I think it might be caused by a large pressure difference before and after the control valve, along with a small opening degree.
Our pipe diameter changes from 150 to 50. I’m wondering whether it’s due to this change in diameter, and to the throttling that occurs at the control valve, that causes the propylene to vaporize and generate gas, in a manner similar to cavitation
Our pipe diameter changes from 150 to 50. I’m wondering whether it’s due to this change in diameter, and to the throttling that occurs at the control valve, that causes the propylene to vaporize and generate gas, in a manner similar to cavitation
Reducing the pipe diameter before and after the control valve is intended to increase the pressure difference across it, thereby facilitating its control. However, a problem that often goes unnoticed is the phase change of the medium that can occur due to an excessively small opening degree; this issue requires our attention. Therefore, it is necessary to avoid keeping the control valve in a range of low opening degrees for extended periods of time. Therefore, I suggest that you adjust the opening degree of the valve upstream of the control valve using a small control valve, so as to ensure that the control valve is positioned at an appropriate level and thus prevent such phenomena from occurring, ensuring smooth operation of the device!