DHK Overview DHK Centifugal Blowers * AMCA certified performance for sound and air. * Fiberglass Reinforced Plastic (FRP) centrifugal blower assembly, manufactured using high quality corrosion resistant resins and fiberglass reinforcing able to withstand temperatures up to 210 deg F. * UV inhibitors are added to the resins and are flame retardant class 1 of 25 or less. DHK Design Features * Casing smooth on the exterior, resin rich interior, reinforced walls to remain true under suction pressure. * The DHK 1225 and 1500 feature a molded FRP Class I backward inclined impeller in clockwise rotation only. * For size 1825 and larger FRP impellers are standard Class II design backward inclined airfoil design in both CW and CCW rotations. * Fan supports are manufactured for the DHK 1225 & 1500 are structurally formed steel and polyester powder baked coated. All larger sizes stands are structural steel and are epoxy coated. DHK Sizes and Performance * Sixteen sizes are available, 1225 (12.25 inch diameter impeller) thru 7300 (73 inch diameter impeller) with capacities from 500 to 130,000 CFM and up to 12" SP. DHK Arrangements * #10 (standard) belt drive allows for a compact footprint when space is an issue, such as mechanical rooms with multiple fans. * # 9 Belt drive is available for larger motors and special designs. * # 4 Direct drive. * # 8 Direct drive.