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Title: Pulsation Free Rotary Piston Meters For Use As Reference Standards
Author: H. H. Dijstelbergen
Source: 1999 International Symposium on Fluid Flow Measurement
Year Published: 1999
Abstract: The paper describes a novel positive displacement meter that features an extremely large range of more than 1 : 400 and pulsation free operation. This meter, when used as a reference meter will allow a significant improvement in the uncertainty that can be achieved in meter calibration. Its performance is virtually insensitive to installation effects such as swirl or uneven velocity distribution. Being of a true positive displacement construction, its pressure dependence, if at all present, will be very small. The pulsations of this meter have been minimised by using two metering cartridges in parallel and connecting the rotors to generate pulsations in opposite phase. The elimination of any residual pulsations by incorporating a flexible membrane retains the superior characteristics of the meter at high pressures. Experimental data on range, repeatability, sensitivity to installations and on pressure dependence are given in the paper.

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