Caleffi Pressure reduction valve causing noise

[angefoh]

OK I have recently installed a Caleffi PRV to a 28mm pipe.
Incoming pressure I am informed by local plumber is 7 bar and I have reduced this to 3 bar. The trouble is that the prv is causing a nasty vibration/humming noise when using any of the taps or shower down stream of the unit.
Any ideas

 

[ShaunCorbs]

Have you fitted a shock arrestor?

 

[chris watkins]

Which type & size of Caleffi PRV has been installed?
Do you know if it is the dynamic type ?

 

[johnduffell]

Could be the flow rate is so low for the size of valve it's bouncing. Have you got a straight run of pipe after the prv to stop it reflecting back and forth and resonating? Ps I'm not a qualified engineer.

 

[oz-plumber]

Post a pic of the valve installed.
It could just be a faulty valve.

I know the sound you are mentioning - it could wake the dead.
Does the valve installed have and isolation valve built into the valve or is it just a plain PRV?
If it has an isolation valve built into it, that could / would be the problem. Try finding a plain PRV and installing a ball valve on the inlet side