Noise Analysis: When this distance is small, the bit stream and trail changes will have an impact, the blades may also be used as sound barriers, and strengthen the blade near the blade lift pulsation generated column on sound radiation. This effect depends on the lift pulsation-related acoustic wavelength as compared with the size of the blade barrier. Within the frequency range of the ratio is greater than 2 square wall axial fan price, due to the impact caused by changes in the intensity of radiation is the most significant. Therefore, explosion-proof axial fan, when the upstream and downstream of the radiation noise of the blade has the same number of leaves, and the leaves of the two columns of each of the blades on both sides of the source and at the same time constituting a sound barrier with a rotor blade meet, this effect will be stronger. Maintenance: 1, the use of the environment should be kept clean, keep the surface clean fan axial fans, inlet and outlet should not have debris regularly to remove dust and other debris inside the fan and piping. 2, this can only be running low noise axial fan wall fan completely under normal circumstances, at the same time to ensure an adequate supply facility capacity, voltage stability, non-defect operation, power lines must be dedicated line, not long-term temporary supply line. 3, fans found during operation abnormal noise fan motor severe fever, live shell, switch trip, you can not start and so on, should immediately stop checking. To ensure safety, do not allow the fan running repairs, maintenance should be carried out after the commissioning of five minutes or so, confirming that no anomalies start running again. Explosion-proof axial flow fan _ Chenyu conditioned factory outlets (certified) _ Qinhuangdao axial fan provided by Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Chen Yu-conditioning in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu conditioning a better future.