0 votes

Why are control valves making so much noise when in operation?

asked Mar 25, 2014 in Process by wangroc (3,280 points)

2 Answers

+1 vote
answered Jan 31, 2015 by jakangaru (2,010 points)
When control valves are not selected appropriately, there is an increased risk for cavitation, which causes high noise and vibration levels. When the bubbles collapse they make a popping sound. The result is a noise like gravel going through the valve. This noise can be loud enough to be very annoying and even loud enough to damage the hearing of a person who is exposed to it for long periods. Also, when the bubbles collapse, they create shock waves that can cause severe damage to the valve.
0 votes
answered Jan 31, 2015 by lilianlope (2,360 points)
FYI, there are several methods to reduce noise in valves: changing control valve and trim design, reduce pressure drop, Metallurgy and mechanical design considerations, operating temperature, Valve location and orientation, piping arrangement, valve support.

Also, there are several methods to reduce noise in pipes: the use of heavy wall pipe; installation of diffusers, mufflers, or silencers; insulation; isolation.