The representation of commonly used fan symbols:

1. EAF exhaust fan
2. FAF - Air supply fan
3. MAF - supplementary fan
4. RAF return fan
5. SEF smoke exhaust fan
Fan is the customary abbreviation for gas compression and gas transportation machinery in China. Generally, fans include ventilation fans, blowers, and wind turbines. Gas compression and gas transportation machinery are machines that convert rotating mechanical energy into gas pressure energy and kinetic energy, and transport gas out.

The RAF series fan is a new type of roof fan developed independently by introducing advanced technology from Europe and America. The product has a smooth exterior design, uniform proportions, and fine craftsmanship, which meets the requirements of buildings for the texture of exposed equipment.

The specific advantages of high air volume, high pressure, low power consumption, light weight, and compact structure are widely used for roof ventilation and air exchange in workshops, factories, and high-end civil buildings in industries such as machinery, chemical, rubber, pharmaceuticals, and textiles.

Made in two structural forms: RAF type adopts conical hub and twisted wing blades, suitable for ventilation and air exchange in medium and low pressure, high flow situations.
It can be made into anti-corrosion and explosion-proof types according to different conveying media.