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ORIFICE FLOWMETER [1 record]

Record 1 2011-09-23

English

Subject field(s)
  • Metering Instruments
  • Fluid Mechanics and Hydraulics (Physics)
DEF

A form of gas or liquid flowmeter consisting of a diaphragm in which there is an orifice placed transversely across a pipe, the difference in pressure on the two sides of the diaphragm is a measure of flow velocity.

CONT

An orifice meter is an inferential meter in which the fluid velocity and flowrate are inferred from the pressure drop occurring through the known area of an orifice plate. Specifically, orifice meter flow is calculated from the flowing gas pressure and temperature, differential pressure drop occurring across the restriction of the meter’s orifice plate, the meter geometry including the meter tube’s inside diameter and orifice plate bore, and the gas composition.

PHR

Sharp-edged orifice meter.

Key term(s)
  • orifice flowmeter

French

Domaine(s)
  • Compteurs de consommation et débitmètres
  • Mécanique des fluides et hydraulique (Physique)
CONT

Les méthodes utilisées sont en évolution permanentes. On utilise toujours le système classique des débitmètres à diaphragme ou à Venturi mais parallèlement aussi des compteurs volumétriques et les compteurs à turbine.

OBS

diaphragme : Membrane ou plaque dont on utilise la déformation élastique pour connaître ou pour commander le mouvement d'un fluide en contact avec l'une de ses parois.

PHR

Débitmètre à diaphragme à bord fin.

Spanish

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