Axial Flow Fan, Fan, Ventilator, Ventilation, Ventilating Fan, Ventilation, Ventilator Fan, Ventilation, Air Mover Application: air ventilating and exhausting in subway, tunnel, mineral, mountain, and construction engineering Specification: 1) Type: single pole type, double pole type, jet flow type, heavy pattern, and outside place type 2) Fan diameter: 280 - 2,400mm 3) Air volume: 2,000 - 650,000m³/h 4) Air pressure: 250 - 2,000Pa.