Differences in Characteristics of Centrifugal Blower, Roots Blower and Rotary blower.

1，Because the roots blower is a constant flow blower.The main parameter of work is air volume.，the output pressure varies with the pipe and load.The air volume changes very little.Roots blower is a kind of high pressure fan，the roots blower is a volumetric blower，the rate of transmission is proportional to the number of changes，the gas is transported from one side of the inhalation to the side of the discharge.

If the load needs a constant pressure effect, a centrifugal fan is used..Because the centrifugal blower is a constant pressure blower.The main parameter of work is wind pressure.The output air volume varies with the change of the pipe and load，the wind pressure changes little.Centrifugal blower.Low wind pressure.The compression process of air is usually carried out by several working impeller under the action of centrifugal force.The centrifugal fan is a square torque characteristic.，and roots blower is basically a constant torque characteristic.

2，The roots blower generally has a larger air volume.，the pressure is also greater.Also the roots blower is very noisy. If you need a small amount of wind,a high demand for noise，choose rotary blower..The rotary blower is also a constant flow blower.，the main parameter of the work is the amount of wind，the output pressure varies with the pipe and load.，the air volume changes very little.Rotary fan is variable compression.Its main features are: low speed, low noise, low vibration, high efficiency, high energy saving.

3，The main characteristic of axial flow fan is constant wind pressure operation.When the pressure changes or there is a barrier in the pipeline，automatically adjust the air supply to ensure the constant wind pressure.Axial flow pumps and fans are suitable for large flow，low pressure，circulating water pump and air supply fan used in power plant.there is not much experience in the use of centrifugal blower in China.Especially large centrifugal blower is still to be perfected.When choosing, should cooperate closely with the manufacturer.

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