Product Description External fans for electric motors is a motor cooling fan that complies with national standards. It uses an aluminum casing and airflow-optimized fan blades can provide high air volume with minimum noise levels. These devices are flow optimized to achieve high air volume at low noise levels. It can effectively reduce the heat of the product when the motor is running at high speed to extend the use of the motor. Voltage and frequency Rated voltage: single phase 110V,220V,380V Three phase:110V,220V,380V,415V,660V,1140V Working Temperature: -15鈩儈+40鈩?/p> Operating mode锛歋1 Technical date Working flow Fan Cover Processing Inspection of raw materials --- Blanking---Punching---Circle---Welding---Shaping--- Flanging---Welding wire mesh---Welding the base of the terminal box---Inspection Painting Processing Grinding and reshaping---Rust decontamination---Cleaning--- Primer spray/Spray undercoat---Drying---Spraying surface coat---Drying---Inspection Fan assembly Process Nailing the nameplate and direction mark---Motor mounting/Installing the motor---Connecting line---Inspection---Installing the base of the terminal box---Final inspection Our Certification UL Certification CSA Certification CE Certification Our Services 1. Warranty: 2 years from delivery date, we will replace or repair the problem fan for free(damage caused by incorrect operation can't be acceptable). 2. Quality Control:100% inspection before delivery. 3. Customized OEM service& Fast response.External Fans website:http://www.mingtong-ventilation.com/external-fans/