Selection Guide - Physical Charcteristics Previous Page Fan Type Diameter (in) Number Of Blades Adjustable Pitch Max Tip Speed (ft/min) Min. Max. 4 5 6 7 8 10 12 16 Series 4 36 48 13,000 Series 4A 36 51 13,000 Series 4DP 36 54 17,000 Series 4ADP 36 51 17,000 Series 6AL 54 84 17,000 Series 8AL 54 120...