RVM 355 – Helios – Back Draught Shutter
To prevent cold air from entering when the fan is not running.
With attached spring return motor (outside air flow).
Electrical control in parallel with fan over 0.9 m long cable.
Cylindrical sheet steel housing with flanges on both sides.
Can be screwed directly onto the fan base plate or flange.
Hole pattern according to DIN 24155. Not for use in direct Ex areas.