1. The outer cylinder of the diffuser for the fire fan box has an equal diameter, and the casing is a reducing cone cylinder. In this way, the flow area of the fluid can be increased. This type of diffuser is easy to process and is suitable for occasions where the diameter of the ventilation duct is the same as that of the centrifugal fan.
2. The diffuser for the fire fan casing adopts an equal-diameter inner core and outer cylinder diffuser. The diffusion effect of the stainless steel fire damper is not as good as that of the previous type, but due to its simple structure, it is also suitable for occasions where the diameter of the exhaust valve is larger than that of the high-temperature fire-fighting smoke exhaust fan.
3. The diffuser used for pressure expansion of the fire fan box has a loose outer cylinder and a convergent inner core cylinder. Since the loose area during operation increases significantly, the pressure expansion effect is very good. It is suitable for occasions where the diameter of the ventilation duct is generally larger than that of the centrifugal fan.
The above content is a detailed explanation of the basic knowledge of the deflector at the base of the fire-fighting high-temperature fire-fighting smoke exhaust fan provided by the smoke exhaust fan manufacturer. It is hoped that the above description can better help you. If you have other questions or do not understand the 70℃ fire damper, you can consult our technical staff directly.