/ Product catalogue / Smoke extraction / Axial smoke extraction fans / Axial smoke extraction fans / VDO 300/2The fans are designed to simultaneously exhaust smoke generated during a fire, and remove heat out of the premise or building. Used in for continuous operation in general ventilation systems. The fans are used for continuous operation at ambient temperatures ranging from -60 °C up to +50 °C (based on the climatic category, see designation key); at the temperature of 300 °C in smoke exhaust mode – up to 2 hours. Fans with a fire resistance rating of 200 °C/2 hours can be made on request. Technical data of the 200 °C/2 hours rated fans are fully identical to those rated 300 °C/2 hours.
The fan consists of a casing, an impeller and a motor. The fan's metal casing with rolled flanges ensures high rigidity and minimal clearance between the casing and the impeller. There is an inspection hatch provided on the fan's casing. All the casing's components are polymer-coated to protect it from environmental exposure. The fans' weight may differ from that stated in the catalogue and depends on what components are used (the motor, the terminal box etc.).
The fans are equipped with three-phase motors rated for 400 V/50 Hz.
Depending on the model, single-speed or two-speed motors are used.
The impeller can have 5, 6, 7, 8 or 9 blades at an angle ranging from 20° to 50°, which allows the fan to be selected as close as possible to the specified point of operation. The special shape of the blades ensures high fan efficiency while providing minimum noise. The impeller is dynamically balanced. The light weight and low moment of inertia of the impeller facilitate prompt starting of the fan. The fan blades are made of die-cast aluminum.
The fan may be installed onto any even surface or directly into an air duct. The fan may be installed in a horizontal or vertical position. When mounting the fan inside the air duct, use flanges to connect the air ducts. In order to mount the fan on the floor, wall or ceiling, use the O-VO supports (not included in the delivery set, to be ordered separately). Rooftop mounting is possible.
