Hangzhou Xingda ventilation equipment to undertake all types of tin ventilation engineering, ventilation engineering tin Hangzhou, Shaoxing tin ventilation engineering, fume purification project in Hangzhou, Hangzhou, engineering, installation and design of ventilation, fire smoke hotel kitchen project, Hangzhou, central air-conditioning duct installation and other train service. The company has experienced professional and technical personnel, specialized in various industrial and mining enterprises, hotels ventilation pipe installation, ventilation ducts schools, hospitals and other ventilation and exhaust gas treatment, waste dust collection of design and installation. This layer of basic zinc carbonate film more closely, can be used as a protective film to prevent the continued internal zinc oxide. If the zinc coating is damaged, the occurrence of galvanic corrosion, since zinc than iron duct flange angle lively production, the negative zinc primary cells and loss as an oxidation reaction, iron is protected. [In contrast, tin galvanic corrosion occurs when duct flange and tin (tinplate), because active than iron, tin, iron were protected inside. However, if the tin layer break, since tin plate as a positive total primary battery flanged duct hook card, so tin will corrode more quickly Hangzhou Xingda iron ventilation equipment to undertake various types of tin ventilation engineering, Hangzhou tin ventilation engineering Shaoxing tin ventilation engineering, fume purification project in Hangzhou, Hangzhou, engineering, installation and design of ventilation, fire smoke hotel kitchen project, Hangzhou, central air-conditioning duct installation and other train services. The company has experienced professional and technical personnel, specialized in various industrial and mining enterprises, hotels ventilation pipe installation, ventilation ducts schools, hospitals and other ventilation and exhaust gas treatment, waste dust collection of design and installation. Reduce ventilation noise source in noise control requirements of the occasion should be used in low-noise ventilation equipment. Different types of ventilation equipment, with the consent of wind, air pressure, centrifugal ventilation equipment airfoil blade noise, ventilation equipment centrifugal type blade forward version noisy. Appropriate to reduce the speed of ventilation equipment. Circumferential speed of the impeller rotation noise ventilation proportional to the square of 10, the circumferential velocity vortex noise impeller 6 th (or 5 th) proportional. Therefore, to reduce speed to reduce noise. Design of ventilation systems, should try to reduce the pressure loss of the system. When the total amount of losses and pressure ventilation system is large, it can be divided into small systems. Flow velocity in the pipe should not be too high, so as not to cause noise regeneration. Airflow velocity should be selected according to the different requirements of the relevant provisions within the established pipeline. Lanzhou flange plate duct factory _ Xingda ventilation (certified) _ more urban duct flange provided by Hangzhou Xingda ventilation equipment. Hangzhou Xingda ventilation equipment (www.tz1288.com/shop/index_6525.html) is a professional, "tin works, tin ventilation engineering, stainless steel ventilation engineering, central air-conditioning duct engineering" company. Since its inception, we adhere to the "good faith, sound management" approach, the courage of healthy competition in the market, so that the "ventilation Xingda" brand has a good reputation. We adhere to the "service first, customer first" principle, so Xingda ventilation won the trust of customers all of the fan, ventilation equipment, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!