ROOFMASTER® STEF ATEX EXHAUST FAN

Roofmaster STEF is available in an ATEX-version for Category 3G, Zone 2. The fan is driven with an Ex IIT3 or an Ex de IIBT4 motor. If the roof fan is intended for a frequency converter drive, the Ex de type motor must be selected. The Ex de motor is equipped with thermistors. In size 1 and 2 the impeller shroud is made of brass and in other sizes the inlet cone is with a brass lining. The fan has been mechanically tested (impact tested) as described in EN13463-1. The ignition hazard assessment has been done according to 5.2.3 of EN 13463-1. The fan is CE-marked and there is an Ex –marking showing the classification of the fan.