Hong Fan Blower Co., Ltd., Henan Province, China backbone enterprise sales hotline 0394-7892627 centrifugal fan is essentially a constant variable flow installation. When the speed is certainly centrifugal fan pressure - flow straight practice should be a curve. Because the external loss of practice is characterized by straight lines meandering. Pressure centrifugal fans have been happening in the intake air density changes degrees or greater reaction. For once given into the guts of the intake air pressure generating the highest (lowest density atmosphere) at a minimum. About a given pressure and flow characteristics of the straight line, there is a power and flow characteristics of the straight line. When the hair dryer to a constant speed, about once a given flow rate, the required power with increased air intake and reduce the degree.