It is composed of impeller, fan, fan, transmission component, live pages, live pages, anti -bird nets, security nets and other components.The fans, hats, and impeller components can be made of FRP to reduce the weight of the whole machine and have good corrosion resistance.
Features: large air volume, low noise, high efficiency, light weight, stable operation, beautiful appearance, can be made into anti -corrosion and explosion -proof types.
Pay attention to factors:
1. The control parameters of the roof fan are the fan type, material, air volume, full voltage, full voltage, efficiency, noise and motor power.
2. According to the physical and chemical properties of the transported gas, select a ventilator with different uses.
3. Pay attention to the matching relationship between the resistance of the pipe network and the characteristics of the ventilator.The operating point of the ventilator is located on the right side of the full pressure point in the performance curve (that is, the high air volume side, and it is generally 80%of the full pressure peak value).
4. When selecting a ventilator, the wind leakage loss, calculation error, and the negative deviation of the actual air volume and wind pressure of the ventilator should be considered. Generally, the safety factor of 1.05 ～ 1.1 and the wind pressure of 1.10 ～ 1.15 is generally used.