Efficient anti-leak off fan TGFY, TGFZ series of general and combination widely used in the wind off of food, feed processing. Oil, chemical, brewing, pharmaceutical and other industries of gas and air mesh ventilation and dust removal process to prevent dust or discharge device discharge opening discouraged. Particularly in the pneumatic conveying system, air leakage requirements of the relevant high, otherwise easily lead to the end of the wind with the material, affect the normal operation of the system ..