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Title: FUNDAMENTAL PRINCIPLES OF ROTARY DISPLACEMENT METERS
Author: Terrence A. Grimley
Source: 2023 American School of Gas Measurement Technology
Year Published: 2023
Abstract: The basic geometric configuration for rotary positive displacement meters was originally conceived for pumping water in the mid-1800s and was patented as a rotary blower in 1860 (US Patent 30,157). The original design used wood for the rotors and understandably had issues with excessive wear. The first rotary positive displacement gas meters that were based on the blower configuration were introduced in 1920 by the Dresser-Roots company. While the basic meter configuration is well established, changes in materials, manufacturing processes over the last 100+ years have improved the meter reliability, rangeability and long-term accuracy so that the meters are still a popular choice even with the introduction of newer technologies.

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