DWT-1 axial flow fiberglass roof fan for anti-corrosion, explosion-proof, high air volume, low noise factory use

1. Roof fans are divided into two series: roof supply fans and roof exhaust fans. They are generally classified into centrifugal and axial flow types according to the type of fan they are equipped with;2. According to the specific form of the rain cap, there are two types: upper exhaust and lower exhaust;3. There are various types of materials used in the production process, including all metal structures, fiberglass structures, and steel fiberglass composite structures.Axial flow roof fanA、 Axial flow roof fans, in terms of their rainproof structural forms, mainly include umbrella shaped rainproof caps, conical rainproof caps, hemispherical rainproof caps, and cylindrical rainproof caps. Among them, ventilation is mainly carried out above the conical and hemispherical rainproof caps, while ventilation is mainly carried out below the umbrella shaped rainproof cap. Both the top and bottom of the cylindrical rainproof cap can be used for ventilation.B、 From the perspective of air diffusion performance, the rainproof cap mainly used for exhaust above has an upward exhaust outlet wind speed of 5.0-8.0m/s, which can blow the discharged polluted air towards high altitude (equivalent to connecting a 2-3m long air duct), which is conducive to better diffusion of the discharged gas,Centrifugal roof fan:Centrifugal roof fans are generally exhaust fans due to the limitations of impeller characteristics, which are characterized by high residual pressure and are mainly used in local exhaust systems. Due to the lack of a volute shell, the aerodynamic pressure generated by the high-speed rotation of the impeller cannot be effectively converted into static pressure, resulting in poor aerodynamic performance and high power consumption. It is only used for systems with high exhaust resistance. Generally, this type of roof fan should be avoided as much as possible for indoor ventilation systems.Installation and precautions of roof fan1. The installation position of the roof fan should be as close as possible