Low Noise Cooling Tower Fan Dia.:500-3,200mm Air volume: 3,000 - 800,000 m3/h Air pressure: 120Pa - 250Pa Cooling Tower Fan(Impeller,Blade), fan, cooling fan,Application: Matched with all types of low-noise crossing-flow or counter-flow coolingtower.Specification: 1)Fan diameter: 500mm - 3,200mm 2)Air volume: 3,000 - 800,000 m3/h 3)Air pressure: 120Pa - 250Pa.