SDS series of specifications from the jet fan 630mm ~ 1600mm, sub-way and reversible axial flow fan operation (bidirectional) axial fans running two categories, the maximum thrust of a 3500N, for any load and working conditions can be selected high efficiency, low noise fan. 
 SDS Series jet fan made good use of advanced quality assurance processes, fan shell special machine imported by the United States flanging spinning impeller section of wall by the metal processing, both to ensure concentricity and strength of the chassis, and ensure blade radial clearance, the appearance of hot-dip galvanized coating or other equivalent treatment, beautiful appearance and corrosion, excellent performance, fan blades, hub Toshiba of Japan automatic CNC boring and milling machining center into a die cavity, respectively, at high pressure and low pressure casting machine casting aluminum alloy high (low) die casting, by road tunnels, railway tunnels, water dam and other users of the actual use prove the performance of the fan and corrosion resistance, reliability, economy technology, quality requirements and economic indicators can fully adapt to all kinds of tunnels, subway use.