Role of pneumatic air muffler
 Aug 05, 2022|View:303

Pneumatic Air Muffler is used to reduce the noise of the parts, why use a Pneumatic Air Muffler? What does it do? If you are interested in these questions, read on!



There are mechanical noise, electromagnetic noise, and aerodynamic noise. The sound produced by solid vibration is mechanical noise. In an electromagnetic coil, the vibration of the moving iron core caused by the alternating current is electromagnetic noise. When the gas flow occurs vortex or pressure sudden change, resulting in gas vibration, and aerodynamic noise.


The Compressed air on the exhaust side of the cylinder is usually discharged into the atmosphere through the outlet of the directional valve. Because of the high residual pressure, the maximum exhaust velocity near the speed of sound, and air rapid expansion, resulting in gas vibration, it has a strong exhaust noise. The magnitude of the noise is related to the exhaust velocity, the exhaust volume, and the shape of the exhaust passage.

Pneumatic Air Muffler


Noise is measured in decibels (dB). The noise of a general machining workshop is 70 ~ 85dB, and the noise of pneumatic tools such as Air Riveter is about 100DB. According to the International Standard, working eight hours a day, the continuous noise is allowed to be 90db; the time is halved, and the noise is allowed to be increased by 3DB, but the maximum is 115db. Anything above 85 dB should be managed to reduce noise.


People's perception of noise is also related to the frequency of the noise. The range of audible frequencies is 20-20,000 Hz, and that of normal speech is 500-2000 Hz. With the same number of decibels, high-frequency noise sounds much louder than low-frequency noise.


A solenoid valve with an effective cross-section of 48.5 mm2 is installed on the gas tank with a volume of 24 l and a pressure of 0.5 mpa in the tank. When the solenoid valve is opened to deflate to the outside, a distance of 1 m from the outlet of the solenoid valve is provided, the general exhaust noise is 80 ~ 120 dB.


Long-term work in a noisy environment, will make people feel tired, work efficiency, reduce people's hearing, and affect human health. Therefore, the corresponding measures must be taken to reduce the noise.


Pneumatic Air Muffler can solve these problems, reducing the noise intensity, to ensure the health of workers.


Define is an export-oriented manufacturer of couplings, stainless steel fittings, pneumatic and hydraulic components, electronic components, automotive components, and plastic products. It offers high-quality products and fast delivery. If you want to buy Pneumatic Air Muffler, contact us!


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