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4.2. Fire resistance__________________________________________________________
Class F400 – fire resistance at 400
o
C for 120 minutes
Class F300 – fire resistance at 300
o
C for 60 minutes
Class F200 – fire resistance at 200
o
C for 120 minutes
4.3. Versions
Single-speed single-functional fans
Two-speed two-functional fans
5. DESIGN AND OPERATING PRINCIPLE _____________________________
5.1. Design ________________________________________________________________________
1 - Fan housing
2 - Axial rotor
3 - Base support
4 - Motor base
5 - Electrical gland
6 - Electric box
7 - Rotor safety
8 - Motor, fire resistant at the specific temperature class
The smoke exhaust axial fan feature a steel housing in the form of a cylinder with connection flanges at
its end, intended for connection with the ventilation system. Inside of the enclosure the motor is located
and supported by the motor base. The rotor is set directly on the motor shaft neck. At the rotor intake and
in line with its centreline is an aerodynamic cone, which improves the flow performance. The fan can also
feature an air stator type KP, located inside of the ventilator casing on the rotor end.
The electric box is installed on the fan casing, to which the electrical wiring of suitable fire resistance is led
from the motor.
The rotors with the diameter D = [355; 400; 450] mm feature 9 blades, while the rotors with the diameter
D = [500-560-630-710-800-900-1000] mm are available with 12 blades.
The fan may work with various blade angles and numbers. This allows adapting the fan performance to
the ventilation system flow resistance characteristics.
Each fan features an inspection hatch which permits verification of the rotor sense of rotation.
