4-72型离心式通风机可输送空气和其他不自燃、对人体无伤害、对钢材无腐蚀性的气体。气体内不允许有粘性物质，所含尘土及硬质颗粒物不大于150mg/m3。气体温度不得超过120℃。该风机具有良好的气动性能、运转平稳、振动小、效率高、寿命长等特点，共有A、B、C、D四种结构。该风机广泛用于工矿企业、大型建筑物、宾馆酒楼等室内通风换气。 4-72 type centrifugal fan will pump air and other non-self-ignition of the human to the steel non-corrosive gases. Gases are not allowed inside the sticky substance, contained in the dust and hard particules is not greater than 150mg/m3. Gas temperature must not exceed 120 ℃. The fan has a good aerodynamic performance, smooth operation, high efficiency, long life characteristics, a total of A, B, C, D four kinds of structures. The fan are widely used in industrial and mining enterprises, large buildings, hotels, restaurants and other indoor ventilation.