Welcome to Alliance Industry Limited !
- Products & Services
- New Products
- Ball Valve
- Butterfly Valve
- Gate,Globe,Check Valve
- On-off Valve
- Cryogenic Valve
- Safety Valve
- Control Valve
- Steam Trapping
- Instrumentation Valve
- Oil Equipment
- Corrosion Resistant Valve
- Marine Valve
- Special Valve
- Instrumentation & Measurement
Search
NameDescriptionContent
Latest news
Treatment of Noisy Control Valves (2)
Source:
|
Author:Alliance
|
Published time: 2020-01-13
|
3301 Views
|
Share:
When the fluid flows through the control valve, if the pressure difference between the front and back is too large, cavitation of the valve core, valve seat and other components will occur, which will cause the fluid to generate noise.
When the fluid flows through the control valve, if the pressure difference between the front and back is too large, cavitation of the valve core, valve seat and other components will occur, which will cause the fluid to generate noise. Last time, I introduced 4 kinds of noise-reducing methods of the control valve, and this time I will introduce 4 kinds of them.
1. Tandem silencer method
Suitable for silencing aerodynamic noise, it can effectively eliminate the noise inside the fluid and suppress the noise level transmitted to the solid boundary layer. This method is most effective and economical for places with high mass flow or high pressure drop ratios before and after the valve. The use of absorbing series silencers can significantly reduce noise. However, economic considerations are generally limited to weakening to about 25 dB.
2.Soundproof box method
Use soundproof boxes, houses, and buildings to isolate noise sources inside, and reduce the noise of the external environment to an acceptable range.
3. Tandem Throttling
Where the pressure ratio of the control valve is high (△ P / P1≥0.8), the series throttling method is adopted to distribute the total pressure drop on the control valve and the fixed throttle element behind the valve. Such as the use of diffusers, porous restrictors, this is the most effective way to reduce noise. In order to obtain the best diffuser efficiency, the diffuser (solid shape and size) must be designed according to the installation of each piece, so that the noise level produced by the valve is the same as the noise level produced by the diffuser.
4. Select low noise method
The low-noise valve decelerates gradually according to the tortuous flow path (porous channel, multi-channel) of the fluid passing through the valve core and the valve seat, so as to avoid the supersonic speed at any point in the flow path. There are many forms and multiple structures of low-noise valves (designed for special systems) for use. When the noise is not very large, the low-noise sleeve valve can be used to reduce the noise by 10-20 dB. This is the most economical low-noise valve.
1. Tandem silencer method
Suitable for silencing aerodynamic noise, it can effectively eliminate the noise inside the fluid and suppress the noise level transmitted to the solid boundary layer. This method is most effective and economical for places with high mass flow or high pressure drop ratios before and after the valve. The use of absorbing series silencers can significantly reduce noise. However, economic considerations are generally limited to weakening to about 25 dB.
2.Soundproof box method
Use soundproof boxes, houses, and buildings to isolate noise sources inside, and reduce the noise of the external environment to an acceptable range.
3. Tandem Throttling
Where the pressure ratio of the control valve is high (△ P / P1≥0.8), the series throttling method is adopted to distribute the total pressure drop on the control valve and the fixed throttle element behind the valve. Such as the use of diffusers, porous restrictors, this is the most effective way to reduce noise. In order to obtain the best diffuser efficiency, the diffuser (solid shape and size) must be designed according to the installation of each piece, so that the noise level produced by the valve is the same as the noise level produced by the diffuser.
4. Select low noise method
The low-noise valve decelerates gradually according to the tortuous flow path (porous channel, multi-channel) of the fluid passing through the valve core and the valve seat, so as to avoid the supersonic speed at any point in the flow path. There are many forms and multiple structures of low-noise valves (designed for special systems) for use. When the noise is not very large, the low-noise sleeve valve can be used to reduce the noise by 10-20 dB. This is the most economical low-noise valve.
Copyright © 2022 Alliance Industry Limited. All Rights Reserved. 辽ICP备17004759号-1
Reliable Valve Supplier.
Complete Solutions for Industrial Valves.
24 hour phone : +86 13889542121
E-Mail: info@alliancex.com
Company
Follow Us
Products
