9-19 high pressure centrifugal fans are widely used in metallurgy, building materials, chemical industry, is the most commonly used high-pressure centrifugal fan, is characterized by high pressure, a small amount of wind power from 2.2kw to 410kw, maximum pressure 15 000 Pa, the maximum amount of wind 6.3 million cubic meters / hour, commonly used in various blacksmiths forced air furnace blast and other places 9-19 centrifugal fan with high efficiency, low noise, smooth performance curve, efficient wide area and so on. The fan is generally used blacksmiths furnace and high-pressure forced ventilation, and can be widely used in transportation of materials, conveying air and non-corrosive gases. The fan is a single inhalation, usually a total of 13 machines №4,4.5,5,5.6,6.3,7.1,8,9,10,11.2,12.5,14,16 number. The right-handed and left-handed fans are usually made of two types, from the motor end face, who said D-clockwise rotation of the impeller fan, to the "right," said the counterclockwise rotation of L fan who said, "the left". Export position of the fan exit angle indicated by the cabinet. "Left" and "right" can be made of 0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees total of six kinds of angles. Fan drive way into three A-type (№4-6.3), D-type and C-type (№7.1-16).