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Title: ROTARY DISPLACEMENT METERS BASICS
Author: Todd Willis
Source: 2019 Appalachian Gas Measurement Short Course
Year Published: 2019
Abstract: Natural gas measurement today is accomplished through the use of two different classes of gas meters. These are inferential type meters, which include orice and turbine meters, and positive displacement meters, which include diaphragm and rotary displacement meters. The inferential type meters are so-called because rather than measuring the actual volume of gas passing through them, they infer the volume by measuring some other aspect of the gas ow and calculating the volume based on the measurements. The positive displacement type meters are so-called because they measure the actual volume of gas displaced through them. The rotary positive displacement meter has been in existence for over 75 years. Its reliability, rangeability, longterm accuracy, and ease of installation, maintenance and testing have made this meter a favorite among gas utilities for billing purposes in industrial and commercial applications. Rotary meters have also gained popularity in the production and transmission markets.




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