[Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - fan] fan noise detection and fan vibration detection: vibration when the fan started to work a small bearing parts, but with longer, dust inside the fan operating time unevenly attached to the impeller, the gradual destruction of the fan balancing without power fan bearing vibration gradually increased, once the vibration reaches the maximum allowed fan 11mm / s (with an amplitude value represents the maximum allowable value below) fan , the fan must be shut down to repair (remove dust accumulation heaters, redo balancing). Because this time is very dangerous, the user must not be forced to use. When approaching the danger fan vibration value, there will be vibration meter alarm. [Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product --DWT / BDW-87-3] environment roof fan roof fan is mounted on the roof of exhaust ventilation, due to the special nature of the installation environment determined that the use of materials and structures fans special. Air backflow device settings after shutdown to prevent roof fan, because the high-speed rotating fan in the hot action, resulting in a lot of the wind speed increases in the duct boiler fan, fan motor reverse start very unfavorable, may be due to the starting current excessive damage. Roof fan in the design should have a reliable rain, snow, wind and sand proof performance, snow and rain did not like sand, snow and sand because not only into the fan from the top, in the outdoor wind speed reaches a certain intensity, Fans may enter from the bottom. Boiler fans, Tianjin Jinzhong Ji ventilation engineering (certified), provided by the Tianjin Tianjin Jinzhong Ji HVAC blower purification equipment. Tianjin Jinzhong Ji HVAC purification equipment Limited (www.Jzjnt.com) is a leader in Tianjin, 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. In the group leadership with the staff warmly welcome all inquiries negotiations to create a better future for the base.