Exhaust fan for the selection of the main control parameters temperature, air flow, total pressure blower, efficiency, noise, electrical power, speed and shaft power. 2. The exhaust fan at a temperature not higher than 85 ℃ conditions should be long-term normal operation. 3. The exhaust fan should ensure that: When the transmission medium at a temperature of 280 ℃ continuous work 30min, and still continuously at medium temperature cooling to ambient temperature during normal operation. 4. Under the rated speed in the work area, fans of the measured pressure curve with the description given in the curve should meet the following requirements: a) axial-flow exhaust fan at a predetermined flow rate, corresponding to the pressure deviation of ± 5%. b) centrifugal exhaust fan at a predetermined flow rate, corresponding to the pressure deviation than A sound level noise limits ± 5%. 5. exhaust fan in the specification given operating point under should comply with JB / T8690-1998 of. The company's main products are aluminum foil phenolic compound duct, color steel composite duct, extruded aluminum foil composite duct, GF-Ⅱ Goldwind composite duct, MG non-combustible inorganic glass fiber and magnesium duct, BWG water resistant non-combustible inorganic glass steel duct, GRC fiberglass duct, fan, muffler, fire dampers, aluminum outlet. Also sells fire-resistant partitions, fire package, blocking materials, and undertake water, electricity, heating, air defense and other installation business gxf blower, the company pioneered send quality system certification by ISO, it is widely used throughout the province. To better serve the market, the company set up a blower Yellowstone installation company to carry out integrity, credibility and achieved broad market. I produced all kinds valve, fire dampers, exhaust valves, regulating valve, series: round zipper valve, butterfly valve handle, zipper-style butterfly square, round flapper valve, flapper valve square, round check valve, square valve, remote control smoke dampers, remote control exhaust valves, exhaust fire dampers, exhaust valve swf blower, automatic smoke fire FHZ, smoke fire control valve FYFH-3 FYFH- 7, since hanging over plate damper FHF-1 FHF-2 FHY-1, ceiling dampers FHX, fire control valve FHT-2 FHT-7, a small fire control valve FHT-4 FHT-5 Chizhou blowers, blower Hefei Where to sell? Blower prices from Shandong Fan Air Conditioning Equipment Co. GREAT. Chizhou blowers, blower Hefei where to sell? Blower fan GREAT price Shandong Air Conditioning Equipment Co. (www.greatfengji.com) this year introduced a new upgrade, the above picture is for reference only, please call Tel picture on this page or to obtain the latest information, contact Person: Li.