... heat recovery boiler,,,,and various boilers. 2.Structure Centrifugal fan mainly consist of impeller,case,air inlet,adjusting door, ... product performance requirement and operation environment for the Centrifugal Fan of you need,so that we can customize optimal ... /air flowtotal pressure or static pressurevoltage and frequencymedium temperature and desityaltitude of operation place ... KKF Fan and Blowers