SPECIFICATIONS - THEREC KINEMATICS

WHISPAIR BLOWER100% DISCHARGE PRESSURE120%80%140%100% DISCHARGE PRESSURE60%CONVENTIONAL BLOWERPRESSURE PULSESROOTSWHISPAIR ROTARY POSITIVE BLOWERSSPECIFICATIONSLOWER AIR PULSATIONP atented Whispair blowers operate withup to 50% less pressure pulsation than con-ventional blowers due to the pressure equal-izing effect of the Whispair conventional blowers, as the impelleropens up to the outlet port, the higher pres-sure air in the discharge line rapidly expandsinto the lower pressure pocket formed by theimpeller and the blower case. The resultingshock wave strikes the advancing surface ofthe impeller at sonic velocity. Four pressurepulses occur each revolution, transmittingshock loads to the gears and BEARING LIFEThe pre-pressurization of the low pres-sure pocket through the Whispair cavitysmooths the pulsations and results in lessshock being transmitted through the impel-lers to the bearings, resulting in approximately20% longer bearing VIBRATIONThe reduction in the magnitude of thepressure pulsation results in smoother NOISEThe pressure pulses, inherent in the ro-tary-lobe design, are also the major source ofblower noise.

whispair blower 100% discharge pressure 120% 80% 140% 100% discharge pressure 60% conventional blower pressure pulses roots whispair® rotary positive blowers specifications lower air pulsation

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