Step 1: Define the operating requirements, including the required airflow, air pressure, medium temperature, and medium composition (whether it contains dust, corrosive substances, or is flammable or explosive).

 

Step 2: Select the fan type. Based on the airflow and air pressure relationship, choose an axial flow fan or a forward-curved centrifugal fan for low-pressure, high-volume applications; choose a backward-curved centrifugal fan for high-pressure, medium-volume applications; and choose a mixed-flow or oblique-flow fan for special operating conditions.

 

Step 3: Determine the material and explosion-proof/corrosion-resistant rating. Choose stainless steel for corrosive environments, heat-resistant materials for high-temperature environments, and explosion-proof fans for flammable and explosive environments. Determine the explosion-proof rating according to standards.

 

Step 4: Match the motor power. Calculate the shaft power based on the airflow and air pressure, allowing for a safety factor of 1.1-1.3 times. Select a Class 1 energy-efficient motor for energy saving and durability.

 

Step 5: Confirm additional requirements, such as the outlet direction, whether noise reduction is needed, and whether variable frequency control is required, to ensure the fan is suitable for actual usage needs. Selection principles: Prioritize larger over smaller (but not blindly choose the largest), adapt to operating conditions, prioritize quality, and ensure energy efficiency; avoid focusing solely on price while ignoring performance.