SDS tunnel jet fan is a new product developed by our company with advanced technology. Its efficiency is obviously better than conventional axial flow fan, and its performance indexes, corrosion resistance, high temperature resistance, reliability and other technical requirements are completely suitable for the use of all kinds of subway and tunnel to optimize the system engineering. In the domestic counterparts leading level. Tunnel jet fans can be divided into unidirectional jet fans and reversible bidirectional jet fans. The air volume can meet the requirements by changing the number of blades and blade angles, and suitable fans can be selected for any load and working conditions.