Fire exhaust fan speed instability Reasons fire exhaust fan is a fan of high-performance products in their daily work can meet the needs of fire ventilation is Guanfan used in various fire smoke systems. But we would often fire exhaust fan speed instability phenomena in use, greatly reducing the efficiency of the fan. Manufacturers of professional and technical personnel to make the fan speed for this instability for detailed analysis, problem solving. Fire exhaust fan speed instability has mainly the following reasons: 1. The fan internal problems SCR, exhaust fan, open circuit, short circuit or an internal line is bad; 2. The fan motor internal problem or a rectifying diode damage; 3. Adjustable resistors used for too long, exhaust fan manufacturers, will be prone to poor contact; 4. electronic rotor and commutator brushes between the toner is still alive is bad, so you can first commissioning resistance , HTF exhaust fan, and then tested. The basic design requirements of the exhaust fan fire exhaust fan fire which is one of the common fan, is now used in various occasions, it's ultra-high performance we have not unfamiliar, but fire exhaust fan Application needs some basic design requirements, we know how much of this information, let's take a closer look at: The first is the chassis design requirements, general fire exhaust fan case are cylindrical or tapered cylindrical shape. Cabinet should have sufficient strength and rigidity, the machine should be able to withstand static and dynamic loads, so that deformation and vibration generated by the housing to a minimum. At specified operating conditions, according to last at least 15 years (except wearing parts), the first security operation time before overhaul designed to be less than 18,000 hours. In addition, the exhaust fan price, fire exhaust fan type size, parameters and characteristics should be consistent with the provisions of GB / T3235, there is the same number of fans in the same series machine, its components (including spare parts and spare components) should be able to interchangeable. The basic design requirements for fire exhaust fan is mainly these, we must properly follow the instructions, and thus its performance into full play, everyone in the application process for fire exhaust fan basic design requirements as well as what you do not understand, Please feel free to contact us. Exhaust fan | exhaust fan manufacturer | Suntown clean air conditioning (certified merchants) by the Texas Sheng provide clean air-conditioning Equipment Co., Ltd. Road Zhiyuan, temper forward. Texas Air Conditioning Equipment Co., Ltd. Sheng-purification (www.dzhffj.com) aims to become and you win symbiosis, strategic partners to move forward, more determined to become a fan, ventilation equipment most influential companies, together with you leap and common success!