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Title: Large Capacity Positive Displacement Gas Meters Diaphragm And Rotary
Author: Howard H. Holmes
Source: 1974 International School of Hydrocarbon Measurement
Year Published: 1974
Abstract: This paper will describe some of the techniques necessary to size and successfully operate large positive displacement gas meters. Large displacement meters are differentiated from domestic size meters on a capacity basis. Normally, any meter measuring more than 500 cfh is classified as a commercial, industrial or large displacement meter. It does not necessarily follow that the large meters will operate at higher working pressures than domestic meters however, more often than not, this is the case. Positive displacement gas meters are devices that measure volumes under pipeline conditions of pressure and temperature. If we are to accurately determine volumes at elevated pressures and varying temperatures, the volumes totalized by the gas meter must be modified to take into account the combines! Gas law and the Deviation from Boyles Law. Large capacity displacement meters are available with atmospheric capacities up to 38,000 cfh, and meter cases are available for static working pressures up to 1,440 psi.

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