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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 edition. Excerpt: ...and the differential increased from 16 inches to 30 inches without any change in the valve C, consequently without any increase whatever in the amount of steam passing through the orifice. After the compressor was started the differential reading again increased without any increase in the amount of steam passing through the orifice. Inasmuch as the increase of differential was not due to an increased flow of steam, the effect was due to the pulsation occasioned by the opening and closing of the slide valves of the generator and compressor, both of them being reciprocating units. It is noted that prior to the test when the machines were not operating that the differential arm remained at zero when there was no steam passing through the orifice, and that after valve C was closed, when there was no steam passing through the orifice, that a differential pressure of approximately 9 inches of water was recorded, due to pulsation only. This differential continued as long as the generator and compressor operated at a uniform speed. The static pen arm in previous tests vibrated over a range of 10 to 15 Ib. with a frequency of the opening and closing of the valves of the reciprocating units when they were operating. To lessen this vibration a dash pot was attached to a static pen arm producing the smooth lines as shown. The effect of partially closing the valves on the gauge lines also produced a smooth pressure reading but gave erratic differential readings. In all cases when the gauge line valves were fully opened the differential reading was very uniform without any appreciable vibration. The weight of steam passing the orifice checked with a differential reading of 16 inches for the total period of the test, so that the flow corresponded to...
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Excerpt from Measurement of Gas and Liquids by Orifice Meter The first edition of Measurement of Gas by Orifice Meter published in 1918 was the first instance that we know of where the complete data pertaining to the orifice meter and orifice measurement was presented in book form, and it is gratifying to both the author and the publisher to know that the book was received with such favor as to have exhausted the edition in a comparatively short time. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
This book gives the background to differential-pressure flow measurement and goes through the requirements explaining the reason for them. For those who want to use an orifice plate or a Venturi tube the standard ISO 5167 and its associated Technical Reports give the instructions required. However, they rarely tell the users why they should follow certain instructions. This book helps users of the ISO standards for orifice plates and Venturi tubes to understand the reasons why the standards are as they are, to apply them effectively, and to understand the consequences of deviations from the standards.
There is a tendency to make flow measurement a highly theoretical and technical subject but what most influences quality measurement is the practical application of meters, metering principles, and metering equipment and the use of quality equipment that can continue to function through the years with proper maintenance have the most influence in obtaining quality measurement. This guide provides a review of basic laws and principles, an overview of physical characteristics and behavior of gases and liquids, and a look at the dynamics of flow. The authors examine applications of specific meters, readout and related devices, and proving systems. Practical guidelines for the meter in use, condition of the fluid, details of the entire metering system, installation and operation, and the timing and quality of maintenance are also included. This book is dedicated to condensing and sharing the authors' extensive experience in solving flow measurement problems with design engineers, operating personnel (from top supervisors to the newest testers), academically-based engineers, engineers of the manufacturers of flow meter equipment, worldwide practitioners, theorists, and people just getting into the business. - The authors' many years of experience are brought to bear in a thorough review of fluid flow measurement methods and applications - Avoids theory and focuses on presentation of practical data for the novice and veteran engineer - Useful for a wide range of engineers and technicians (as well as students) in a wide range of industries and applications