centrifugal blower applied to paking machine,fuel cell, air bag ,etc. Voltage: 12VDC / 24VDC; Speed:20,000rpm; 6. ... phasethree phase Centrifugal blower for CPAP machine with 38.8 CFM airflow applied to paking machine,fuel cell, air bag ,medical equipment,etc.Size ... pressure max: 62cm;Hall sensored / sensorless; Centrifugal blower for CPAP machine with 38.8 CFM airflow