Catálogo no201: Ventiladores conoidales Buffalo Niagara . y importante que la curvatura de la pala debe variar para cumplir con las condiciones exactas existentes en cualquier punto, en el lado de entrada la curva de la pala es más aguda cerca de la admisión donde la velocidad es la más alta y la curva de tisida disminuye hacia atrás, con el resultado de que el aire se scooielessly y sin inipact a un ángulo correctamente proporcionado a lavelocidad real de la pala. La curvatura de la pala es tal que a la capacidad nominal normal el aire leavo la punta con una presión de velocidad aproximada-mately dos veces la presión corr

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• Dimensiones: 1771 x 1412 px | 30 x 23,9 cm | 11,8 x 9,4 inches | 150dpi

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Catalog no201: Buffalo Niagara conoidal fans . y important that the curvature of the blade should vary to meet theexact conditions existing at any point, On the inlet side the curve of theblade is sharpest nearest the intake where the velocity is the highest and thiscurve decreases toward the back, with the result that the air is scooped upnoiselessly and without inipact at an angle accurately proportioned to theactual speed of the blade. The curvature of the blade is such that at normalor rated capacity the air will leavo the tip with a velocity pressure approxi-mately twice the pressure corresponding to the peripheral velocity of theWheel in order to reduce the required speed of rotation. In the same waythe outlet angle is sharpest at the intake where the diameter is the greatestand the static pressure is considerably increased at this point compared withany other multiblade fan. NIAGARA CONOIDAL (TYPEN) FANS F.ven volume and pressureoveremire width Uneven volume andpressure. Blade narrowpsihere to Rivea maximiimdiameter ofinlet. 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 accura