5 replies to this topic

[joerd]

You haven't provided many details (fluid composition, type of valve, valve size, operating temperature, flow rate, etc.). However, a liquid and gas mixture upstream of the valve will almost always cause vibration as gas bubbles (or liquid droplets, I don't know which one is the continuous phase) hit the valve, get accelerated, maybe grow and shrink again, as they pass through the valve. So if you can make the inlet single phase, this would help a lot. Otherwise, you'll need very good supports and a heavy duty valve trim to avoid problems.

[joerd]

Even though you still haven't supplied much, this looks like a difficult application (two-phase inlet). I suggest you consult the CV vendor for a good valve selection, read through the Fisher Control Valve Handbook at http://www.emersonpr...umentation.html and make sure that the valve is well supported to minimize vibration.

[proinwv]

Have you checked for cavitation of the liquid?