Roof ventilation air flow exhaust accident should be based on the information provided process design determined by calculation, when the process is not designed to provide the relevant calculations, arcs, roof ventilators, should be not less than hour room eight times the total volume of ventilation determine the amount. Exhaust accident should have completed the regular use of roof ventilators and accidents exhaust ventilation system in the event of an accident but must provide sufficient amount of exhaust. Roof ventilation exhaust air accident should be based on the information provided process design determined by calculation, when the process is not designed to provide relevant calculations, shall be not less than 8 times per hour room ventilation to determine the total volume. Exhaust accident should have completed the regular use of roof ventilators and accidents exhaust ventilation system, but must at the time of the accident, Guizhou roof ventilators provide sufficient exhaust volume. Aluminum non-powered ventilation of repair and maintenance: 1, aluminum without power ventilation under normal circumstances, about a month of continuous operation shall be to inject sodium calcium bearing grease or molybdenum disulfide grease with butter site. Fan runs continuously for 3-6 months, roof ventilators price, to replace a grease to fill 2/3 of bearing space is appropriate. 2, aluminum without power ventilators regular maintenance, eliminate internal fan fouling, dirt. 3, no power ventilation in aluminum boot, shutdown or operation, as found to be normal, including temperature, vibration, noise, etc., should be inspected immediately. 4, use the triangle belt adjustment device keep uniform tension state, can not be too loose or too tight, a few triangle tape should be the same length. Boiler roof ventilators, Flextronics ventilators (certification), Guizhou roof ventilation consists of Liaocheng Ventilation Equipment Co., Ltd. Flextronics. Liaocheng Flextronics ventilation equipment (www.lcwctf.com) (www.lcwctf.com) is an industry leader in Shandong Liaocheng, 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. Flextronics ventilation in leadership with the staff warmly welcome all inquiries negotiations to create Flextronics ventilation a better future.