SDF-I series of pipeline pressure axial fan unit number: -11.2 3.5 # # air volume :4000-60000m3 / h Total pressure :343-686Pa features: pressure, low noise, high efficiency axial fan applications: industrial and civil pressure supply and exhaust pipes SDF-II series airfoil axial fan spinning machine No.: -11.2 3.5 # # air volume :4000-60000m3 / h Total pressure :343-686Pa Features: airfoil blades, two-speed motor regulate working conditions, high efficiency, smooth operation, flow, low noise, simple structure, the performance curve is flat, easy installation and maintenance applications: textile air conditioning and ventilation, and other non-corrosive gases ventilation occasion