AXV (Former named AXD) or AXV ... R (Former named RXD) Tunnel axial fl ow fans are specially manufactured for all applications and mounting positions in case sizes 315 up to 3,150 mm diameter. The performance range is from 1,000 up to 1,100,000 m³/h on air volume, at static pressure up to 3,000 Pa (or tatal pressure up to 3,500 Pa). Higher pressures are possible on multi-stage versions.