Vertical Root Blower SANCO SCD Series rotary blower incorporates a 3 lobe spur type rotor. that greatly lowers noise by a structure that continuouslyconveys air. Another characteristic of the 3-lobe rotor is that reduces torque fluctuation and stabilizes flow volume.rotor is that reduces torque fluctuation and stabilizes flow volume. Suitable for wastewater treatment plants, agriculture, power conveyance, hotels, hospitals,agricultural product processing.plants, plastic pellet factories,Paper mills, food Industry , chemical Industry and office building where needed low noise.