1, cold rolled stell impeller 2, impeller diameter:360mm to 800mm. The airflow can be up to 25000m3h. 3, Below is data for the diameter630mm 4, it can be applied for chiller, condensor, The parameter can be adjusted. Below is the parameter of size 600mm Voltage 400V Frequency 50 Airflow(m3/h) 10800/8500 Speed(RPM) 880/700 Power(w) 500/320 .