... 15 years No power turbine ventilator parameterModel 300,500,600 ventilator generally refers to the diameter of caliber separately ... is 300mm,500 mm,600 mm.Subassembly parameter of different models ventilator as ... Fluorocarbon Coating /304SS Fluorocarbon Polyester Coating Aluminum VentilatorModel300/500/600 : Material Aluminum as material,coat ≥20μm Fluorocarbon ...