The noise control pneumatic valve different solutions ( 1)

is to spread out the total pressure drop in fixed after adjust the pneumatic valve and pneumatic valve throttling element. Such as diffuser, porous current limit board, this is the most effective ways to reduce the noise in order to get the best diffuser efficiency, must according to the situation of each device to design the diffuser ( Entity shape, size of the pneumatic valve noise level and the noise level of the same diffuser. Adjust the pneumatic valve pressure than high ( △P / P≥。 Place, using the method of series throttle.

eliminate cavitation noise method bubble burst occurred high speed impact and cavitation are the main hydrodynamic noise source. When the cavitation. Make its strong turbulence in local, cavitation noise. This noise has a wide range of frequencies, rattle, similar to the sound of a fluid containing sand. Eliminate and reduce the cavitation is one of the effective methods to eliminate and reduce the noise.
eliminate resonance noise
just have strong noise energy superposition and produce many decibels. Some said to vibration strongly, only to adjust the pneumatic valve resonance. Noise is small, some weak vibration, and the noise is very large; Some vibration and noise is larger. The noise in a single tones of the voice, the frequency is commonly Hertz. Obviously, eliminate resonance, noise disappear naturally.

in the method of thick wall pipe with thick wall tube can reduce the noise decibels. The same diameter wall more thick, using thick wall tube is one of the ring road disposal method. Use thin wall can increase the noise decibels. The same wall thickness pipe diameter, the greater the noise effect is better. Such as the DN pipes, its thickness, respectively. 。 。 。 Mm, can reduce the noise, respectively 。 - The increase. Db. Wall more thick pays interest, of course, the higher the rotor pump Custer red wine.

using sound-absorbing material method because the noise will be through the fluid flow and long distance conveying, this also is a kind of more common, the most effective treatment method of the road. Can be used sound-absorbing materials cover the noise source and pipeline after pneumatic valve. Must be pointed out. So the sound-absorbing material package, using thick wall tube to where, where the effectiveness of the noise cancellation is terminated. This method is suitable for the noise is not high, the pipeline is not long, because this is a relatively expensive method.

series muffler method can effectively eliminate the transmitting noise and suppress within the fluid layer to the solid border noise level. For high mass flow rate or high pressure drop ratio before and after pneumatic valve, this law shall be applicable to as aerodynamic noise sound attenuation. The law is the most effective and economic. Using absorption type series muffler can greatly reduce the noise. But consider from the economy, generally limited to decay to about db.

soundproof box method isolating noise inside, use soundproof box, houses and buildings. Reduce the noise of the external environment that people can accept range. Low noise of pneumatic valve is used in the

in order to avoid occur at any point in the flow of supersonic. There are a variety of forms, low noise pneumatic valve according to the fluid by adjusting the pneumatic valve pneumatic valve core, adjust the pneumatic valve pneumatic seat tortuous flow ( Hole and slot way gradually slow down. A variety of low noise of the structure of pneumatic valve ( For specific system design for use. When the noise is not very big, choose low noise sleeve pneumatic valve, can reduce the noise decibels, this is the most economical low noise of pneumatic valve.
series throttling method