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Title: Positive Displacement Liquid Meters
Author: Barrie L. Bloser
Source: 1975 International School of Hydrocarbon Measurement
Year Published: 1975
Abstract: The Positive Displacement (P.D.) Meters we are familiar with today are very much the same in principle as they were a quarter of a century ago. However, the demands of progress in the petroleum industry has stimulated competitive actions among manufacturers to continually make improvements in the performance of their meters. These meters employ a very important role in the measurement of petroleum liquid hydrocarbons. Meter acceptance in the petroleum industry has phased into every segment from the production well on crude oil to the refinery and then on the finished product from the pipeline, tanker or barge to bulk terminals for distribution. From these bulk terminals the distribution is generally made by tank truck loads to bulk consumers and fuel oil dealers. The distribution is broken down even further with smaller trucks delivering gasoline to the service stations and fuel oil to the homes. The service station is the final link between the refinery and the consumer for most gasoline. Many metering operations are in process throughout the production and marketing of petroleum liquid hydrocarbons. These operations include the production meter, LACT meter, pipeline meter, terminal meter, tank truck meter and dispenser meter. Of course there are many other applications where metering of petroleum products such as aviation fuels, liquified petroleum gas, lubricants and asphalt is required. This discussion will cover the theory of operation and performance, design, application and proving of the meter types most likely to be involved in these flow measurement applications.

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