RAF Fans of the series is the introduction of advanced technology in Europe and America developed a new type of roof fan, smooth, contour design in the product ratio, sophisticated technology, to meet the high-end construction for exposed equipment texture. Specific wind capacity, high pressure, low power consumption, light weight, compact structure, etc., widely used in shop floor and roof ventilation of senior civil, mechanical, chemical, rubber, pharmaceutical, textile and other industries. 
 Made of two structural forms: the RAF type with conical wheels, distort the wing blade, apply to the low pressure, high flow ventilation occasions. RTCX-Type II with optimized impeller, applies pressure to the exhaust ventilation higher occasions. 
 , Depending on the transmission medium, made of corrosion proof type. 
 According to user needs can be equipped with a gravity-return valve, repair switch, centralized control boxes and other optional accessories.