First, the characteristics and application F4-72 FRP centrifugal blower fan series is a new company based on the original 4-72 centrifugal fan design that preserves the aerodynamic performance of the prototype fan, but also with special technology, with high efficiency, low noise, light weight, high strength, corrosion resistance, aging resistance. This series of fans are widely used in general ventilation plant and all types of buildings, and particularly applicable to chemical, electroplating, medicine and other special industries, transport flammable and explosive gases, can be used BF4-72 FRP centrifugal fan explosion , fans of the series compared with other fans, but also has good performance and service life. If the user needs the fan frame please note when ordering. Wherein the C-type transmission, 6A above FRP centrifugal fan shape structure dimensions, while ordering the fan, in accordance with the number of each machine, separate drawings, can also refer to user requirements. Second, the fan type, drive way left and right hand fan can be made in two forms, a front end of the motor, the impeller rotates clockwise, known as D-blower to "right", he said; counterclockwise rotation, said for the L-blower to "left". Export position of the fan to the outlet angle to the cabinet said. Third, the blower fan diameter specifications: 2.8 # --- 12 # air volume: 4420 ---- 48800 m3 / h Pressure: 317-2118pa