Industrial grade multistage centrifugal blower that works as a centrifugal vacuum pump to generate strong and stable negative pressure for dust removal and vacuum conveying. Cast iron body with optimized 45 degree 22 blade impeller design, 380V power, and 70 to 80 dB noise level. Suitable for factory dust collection networks, workshop cleaning, and conveying of lightweight granular materials, supplied directly from a China manufacturer for cross border procurement.