As a widely used equipment in the industrial field, the noise generated during the operation of multi-stage centrifugal blowers is of great significance for evaluating the working environment, human health, and equipment performance. Therefore, clarifying its noise standards is crucial for the design, manufacturing, and use of multi-stage centrifugal blowers.

Generally speaking, the noise standard of multi-stage centrifugal blowers is related to multiple factors, among which the most common one is measured based on sound pressure level. In China, there are clear regulations on the emission standards for industrial enterprise boundary environmental noise (GB12348-2008). If it is an area outside the factory boundary with a sound environment functional zone category of 0, the noise limit during daytime (6:00-22:00) shall not exceed 50dB (A), and at night (22:00-6:00 the next day) shall not exceed 40dB (A); Class 1 areas (residential, cultural and educational institutions as the main areas) shall not exceed 55dB (A) during the day and 45dB (A) at night; Class 2 areas (mixed residential, commercial, and industrial areas) shall not exceed 60dB (A) during the day and 50dB (A) at night; Class 3 areas (industrial areas) shall not exceed 65dB (A) during the day and 55dB (A) at night; There are corresponding standards for both daytime and nighttime in Class 4 areas (areas on both sides of transportation arteries).

However, in practical application scenarios, the noise standards for multi-stage centrifugal blowers need to be comprehensively considered based on industry characteristics and specific needs. In some industries with high requirements for noise control, such as electronics, pharmaceuticals, food processing, etc., it may be necessary to control the noise of the blower at a lower level, such as below 60dB (A) in the work area, to ensure normal production and work, while avoiding health problems such as hearing damage to operators.

In addition, there are considerations for the internal noise standards of multi-stage centrifugal blower equipment. If the internal noise of the device is too loud, it may have adverse effects on the operating performance of the device itself, such as affecting the stability of the device, reducing the service life of the device, etc. Therefore, in the design and manufacturing process, the noise transmitted inside the equipment should be controlled as much as possible to ensure that the equipment operates within a safe and reliable range.

In summary, the noise standard for multi-stage centrifugal blowers is a comprehensive consideration that needs to be determined based on different application environments and specific situations, in order to meet production needs while minimizing the impact on the environment and human health.