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Title: Fundamental Principles Of Rotary Displacement Meters
Author: Thomas Sowell
Source: 1999 Western Gas Measurement Short Course
Year Published: 1999
Abstract: All rotary piston meters, commonly known as rotary meters, utilize the fundamental 1846 lobed impeller design of the Roots brothers. Figure 1 Originally designed for water pump appiications, this fundamental style has been parent to virtually all Interweaving rotor designs applied to gas and liquid compression, pumping and measurement applications. The first positive displacement rotary meters manufactured for gas applications were built in 1920.

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