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Title: Estimating Differential Pressures Of Rotary Meters At Elevated Pressures
Author: Glenn H. Chamberlain
Source: American Gas Association 1977
Year Published: 1977
Abstract: The variation of AP with regard to temperature is slightand is generally ignored in any calculations. Data was provided by Dresser Measurement covering differential tests made in 1972 on 1.5 MI25, 3MI25, 7 MI25, 1l MI25, 16 M125.23 M 125 and 38 M 125 rotary meters. The average test results from two meters of each size were used in this study. Each of these sets of two meters had average atmospheric differential pressures as determined from a sample of twenty meters of each size. The tests were conducted using a closed loop on 0.6 sq. gas at 10%, 25%. 60% and 100% of maximum dial rates of flow at 8 iwc, 15 psig. 45 psig. 90 psig and 120 psig. The common equation factors at these pressures would produce the following pressure multipliers:

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