The Clark AF250 pneumatic air fan is a small, high output air fan for use in underground coal mines, hard rock mines and construction sites. The fan can be used for ventilation purposes to either draw polluted air or gases away from an area or to ventilate with clean air.The outer housing, guards and motor of the AF250 are of a steel construction. The eight blade impeller is made from Anti Static Glass Reinforced Polyamide (PAGAS) material which is suitable for explosive environments. The fan can be used as a stand alone unit or with ducting fitted over the outer housing. Two hanging points are provided so that the fan can easily be mounted with chain or straps from a roof.The air inlet is a standard Type A snap coupling style and the air stream requires light lubrication as detailed on the specifications layout page.