Several methods for reducing the noise of electric valves

The use of electric valve sound absorbing material method: This is also an effective sound path treatment. The noise source and the electric valve post-valve line can be wrapped with sound absorbing materials. It must be pointed out that since the noise will travel long distances through the fluid flow, where the sound absorbing material is wrapped, where the thick wall pipe is used, the effectiveness of eliminating the noise is terminated. This method is suitable for situations where the noise is not very high and the pipeline is not very long, because it is a more expensive method; the low-noise valve is selected: the low-noise valve is gradually formed according to the flow path of the fluid through the valve core and the valve seat. Slow down to avoid supersonic speeds at any point in the flow path. There are many forms, low-noise valves of various configurations (designed for special systems) for use. When the noise is not very large, use a low-noise sleeve valve to reduce the noise by 10 to 20 decibels.

Tandem silencer method: This method is applicable to the muffling as aerodynamic noise, which can effectively eliminate the noise inside the fluid and suppress the noise level transmitted to the solid boundary layer. This method is effective and economical where the mass flow rate is high or the ratio of pressure drop before and after the valve is high. Noise can be drastically reduced with an absorbing series silencer. However, from an economic point of view, it is generally limited to attenuation to about 25 decibels; the cavitation noise elimination method: cavitation is the main source of hydrodynamic noise. At the time of cavitation, the bubble burst produces a high-speed impact, causing strong turbulence locally, resulting in cavitation noise. This noise has a wide frequency range that produces a gig sound similar to that of a fluid containing sand. Eliminating and reducing cavitation is an effective way to eliminate and reduce noise.