Exhaust fan in modern industry applications, the most used repair exhaust fan exhaust fan, exhaust fan So what role has it? 1, the exhaust fan shutters realized by the automatic control system fan. Louvers automatically open and close to waterproof, dustproof, beautiful effect. 2, low exhaust fan noise, air volume, low power consumption, the fan cooling effect is obvious smoke test methods: 1, impeller balance correction cut 7BIT 9101 in accordance with the provisions on the balancing machine. 2, the impeller speed test carried out according to the provisions 7BIT 6445. 3, the mechanical operation test fire exhaust fan in the work book Jen confusion speed continuous operation, the bearing temperature stable after 20min, measured bearing m liters and vibration. no more than a liter of 4nC, vibration detection 99 and m values ??should be consistent with the relevant provisions of 7Bfr 96V. 4, the aerodynamic performance test aerodynamic performance test fire exhaust fan according to the provisions of GB + T 1236 will be. 5, acoustic noise measurement test method according to CB / r 2888 requirements. Noise limits should be consistent with the provisions of 7BIT 8690. 6, high temperature test rod into the press GA211 regulations. High performance crystal playing field required to achieve the specified 4.42. Exhaust fan use | liter Rui Electric (Online) | exhaust fan, ventilation and air conditioning provided by the liter Swiss mechanical and electrical equipment factory. L Rui HVAC Electrical Equipment Factory (www.dzsrxfkt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In liters Swiss electromechanical leadership with the staff warmly welcome all inquiries negotiations to create liter Swiss electromechanical better future.