10-18,9-18,9-16 pressure centrifugal fan for small and medium fertilizer plant process equipment, cupola, furnaces, forced air pressurized oil-fired boiler, and can be widely used materials, food delivery. Air transport is non-corrosive, non-spontaneous, non-viscous gas. If no special requirements for medium temperature usually does not exceed 80 ℃, the content of the media is not greater than 150mg / m3. The fan is a single suction and double-suction type, each series consists of 17 machine number, right-handed and left-handed fan can be made of two types. From the motor side of the face, the impeller rotates clockwise, called cis Tornado aircraft, to shun said impeller rotates counterclockwise, called inverse Tornado aircraft, in order to indicate the reverse.