Jet Fan,Fan, Ventilator, Blower, Industrial Fan, Ventilation Equipment, Ventilating Fan Ventilation, Ventilator Fan, Air Mover, Air Moving, Air Condition, Air ConditioningApplication: air ventilating and exhausting in subway, tunnel, mineral mountain, and construction engineering Specification: 1) Fan diameter: 630 - 1,600mm 2) Divided into single direction operational fan and reverse operational fan 3) The biggest thrust power is 3,500Ns.