Catalog no201: Buffalo Niagara conoidal fans . Sharper curve atfroDt. Unnecessarypower atidpressure lossby shock due tohigh velocityof blade atthis poin t. Inrushing airabruptly turnedwith consider-able power Soas, Diagram Showing Advantages of Niagara Conoidal over other MultibladeFans i n Handling Air The theoretical efficiency of multiblade fans is often materially reducedby deflection of the narrow blades when operated at a moderately high speed.This defect which is very commoii is entirely overcome by the peculiar shapeof the Niagara Conoidal blade, which is strong and rigid without the u
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Catalog no201: Buffalo Niagara conoidal fans . Sharper curve atfroDt. Unnecessarypower atidpressure lossby shock due tohigh velocityof blade atthis poin t. Inrushing airabruptly turnedwith consider-able power Soas, Diagram Showing Advantages of Niagara Conoidal over other MultibladeFans i n Handling Air The theoretical efficiency of multiblade fans is often materially reducedby deflection of the narrow blades when operated at a moderately high speed.This defect which is very commoii is entirely overcome by the peculiar shapeof the Niagara Conoidal blade, which is strong and rigid without the use ofexcessively heavy material. From this brief description it is evident that the success and high effi-ciency of the Niagara Conoidal fan depends to a great extent on correct pro-portioning of all the various parts. Extensive tests have been made on theentire line of Niagara Conoidal fans and this company guarantees that thecapacity, speed and horsepower tables given in this catalog are accurateand reliable. BUFFALO FORGE COMPANY. IO i I d <^^ a O s a-I m O p Ii o I 10 NIAGARA CONOIDAL (TYPE N ) F A N S DETAILS OF CONSTRUCTION J WHEEL The blast-wheel has 32 forward curved blades which are riveted at thefront or inlet end to a conical flange and at the back to an extra heavyboiler plate disk or back plate. The peculiar shape of the blades affords alarge riveting surface and consequent rigid support. The hub is a one-piece casting curvedand sloping toward the inlet of the wheelto deflect the entering air to the bladeswith the least resistance and loss in power.It is attached to the shaft by key and setscrews and at the back widens out into adisk which is hot-riveted to the back plate. Four forged tie rods are screwed intothe hub and are attached to the conicalflange at the inlet edgeof the wheel. Theserods are placed at an angle to the inletwhich offers the least resistance to theentering air. Nia^ara Conoidal Wheel HOUSING The housing is of modified shapeas previously desc