... 4, 4.5, 5, 5.6, 6.3, 7.1, 8, 9, 10, 11.2 and so on .Widly ... Flow Fan Type BT35-11Application1,Designed forExplosive atmosphere Zone 1, Zone 22,Designed forGroups IIA,IIB,Temperature classes ... the laboratoryFeatures1,Explosion proof axial flow fan is made up of explosion proof motor , fan blades ,wind cylinder etc ... Cable's outer diameter:Φ9mm~Φ14mm5,Compliance with: GB 3836.1,GB 3836.2,IEC60079-0,IEC60079 ...