Properties and Applications 
 RAF series fans is the introduction of advanced technology developed in Europe and America a new type of roof fan, the product design in a smooth shape, proportion, both said, sophisticated technology, in line with high-grade construction requirements for the texture of the exposed equipment. Specific air volume, high pressure, low power consumption, light weight, compact structure, etc., are widely used in mechanical, chemical, rubber, pharmaceutical, textile and other industries and senior civil factory workshop roof ventilation. 
 Made of two structural forms: RAF type with conical wheels, wing blade twist, suitable for low pressure, high flow ventilation occasions. RTCX-II-type centrifugal impeller optimized for demanding situations in the exhaust pressure ventilation. 
 Can be different according to the medium, made of corrosion proof type. 
 User can be equipped with gravity-return valve, maintenance switches, centralized control boxes and other optional accessories.