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Title: Large Capacity Displacement Meters And Auxilliary Devices
Author: Howard H. Holmes
Source: 1969 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1969
Abstract: Large capacity displacement meters operate on exactly the same principle as small meters however, there are many mechanical refinements included in their design to assure long life and accurate results under more severe operating conditions. The valve gear and timing mechanism of the large meters are much more elaborate to decrease the angular movement of the various bearing surfaces and to allow more accurate valve timing. Points of heavy load in large displacement meters are equipped with high quality sealed ball bearings and stainless steel sleeve bearings where required. Large displacement meters are also arranged so that they can accept correcting equipment that automatically and continuously corrects the measured pipeline volume to base conditions of pressure and/or temperature.

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