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Title: Evaluation Of The Effect Of Relative Humidity Of Air On The Coefficients Of Critical Flow Venturi Nozzles
Author: K. Chahine m. Ballico
Source: Flomeko 2013
Year Published: 2013
Abstract: At NMIA, volumetric standards such as Brooks or bell provers are used to calibrate critical flow Venturi nozzles or sonic nozzles. These nozzles, which are extremely stable, are used by both NMIA and Australian accredited laboratories to establish continuous flows for the calibration of gas flow meters. For operational reasons, sonic nozzles are generally calibrated using dry air but later used with standard atmospheric air at various humidity levels either drawn or blown through the meterunder- test

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