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Title: Orifice Meters - Operations And Maintenance
Author: Donald R. Hurd
Source: 1976 International School of Hydrocarbon Measurement
Year Published: 1976
Abstract: The principle of the orifice meter is many years old. Measurement by orifice meter has been developed to be the simplest and most accurate device for measurement of large volumes of gas. There are several different types of orifice meters used in the industry but we will be discussing a typical installation of our company, such as a 2-pen, 0-100 differential and 0-1000# pressure range, orifice meter with a five-valve manifold. (See Figure 1.) The different styles of orifice meters are the bellows type, sometimes referred to as a dri-flow, and the mercury type which has two mercury chambers connected with a Ubend. Each orifice meter has its own characteristics and each one has its advantages and disadvantages.

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