Dear peers,
I have a 2” control valve on a river water make up line to a cooling tower basin. The control valve maintains the basin water level about 4 feet. The river water header pressure is 150 psig. The control valve makes very loud noise. I assume the noise is from valve cavitation. I contemplate that the noise is caused by too much pressure drop across the valve – almost 150 psi. I am thinking to install either an orifice or pressure reducing valve upstream of the control valve to share the pressure drop, for example, reduce the pressure from 150 psig to 50 psig by the orifice or pressure reducing valve, then pressure drop across the control valve will be 50 psi, not 150 psi.
I appreciate your comments if this idea helps to reduce the noise from the control valve.