Orifice meter definition. AI generated definition based on: Measurement and .
Orifice meter definition. The section with the smallest The point where the fluid flow profile constricts to a minimum cross-sectional area after flowing through the orifice is called the vena contracta, and it is the area of minimum fluid pressure. For example, an orifice plate produces a pressure drop that is a function of the square of the volume rate of flow through the orifice. These devices, along with flow nozzles, are used to measure fluid flow by creating a pressure difference within the flow path. This device referred to as the primary element of orifice measurement is essential in accurate orifice measurement. Feb 17, 2021 · Orifice Meter Definition: The orifice Meter or Plate can be defined as the device in Fluid Mechanics and machinery which is used for measuring the flowing fluid rate or in other terms the average velocity. In plain and simple terms, the orifice is a hole or a cutout, using which one can control or restrict the flow rate. Nov 1, 2023 · Orifice plates are typically sandwiched between two flanges of a pipe joint, allowing for easy installation for fluid to flow through the pipe. While they are similar in some respects, they differ in several important ways, including their design, performance characteristics, and applications. By understanding their working principles, installation requirements, and maintenance practices, operators can optimize performance and achieve accurate flow measurements. The gas static pressure, density, viscosity, and Jan 20, 2024 · An orifice plate is a device widely used in fluid measurement and control systems, particularly for determining flow rates in pipelines. On the other hand, a Venturi meter has a gradually converging and diverging section, which causes the fluid to accelerate and then decelerate. Define orifice meter. An orifice meter is defined as a flow measurement device consisting of an orifice plate, holding device, and pressure taps, where the orifice plate's specifications must conform to established standards to ensure accurate flow measurement. Orifice meters do exhibit this generic wet gas flow response but compared to other DP meter designs the orifice meter is rather resistant to the effect. Jun 26, 2020 · Venturi Meter versus Orifice Meter Definition Venturi Meter versus Orifice Meter:- Venturi meters and Orifice meters are devices which are used to measure average velocity, volumetric flow rate or mass flow rate of a flowing fluid by reducing the pressure of the flowing fluid. e. Additionally Mar 1, 1990 · FOREWORD This standard applies to fluids that, for all practical purposes, are considered to be clean, single phase, homogeneous, and Newtonian, measured using concentric, square-edged, flange-tapped orifice meters. It also presents basic methods for mitigating pulsation effects at meter installations, including a specific procedure for designing acoustic filters that can isolate a flow meter from the source of pulsation. By measuring the pressure difference before and after the orifice, and knowing the properties of the fluid, the flow rate can be determined The discharge coefficient is a dimensionless number used to characterise the flow and pressure loss behaviour of nozzles and orifices in fluid systems. An orifice meter is a flow measurement device in fluid mechanics and engineering. The orifice meter is attached to the pipe with the help of a flange, then the connection for the pressure gauge is taken out from both the side pipes of the plates, and the connection of the pressure gauge is made. That meter has features to cover the 50 percent volume flow rate instruments. With this design, the orifice bore is concentric with the internal walls of the pipe in which it is mounted, and the downsteam bore edge is bevelled to limit the plate edge thickness. It is characterized by its simplicity and cost-effectiveness but has limitations, including a typical inaccuracy of ± 2% to ± 5% and a significant permanent pressure loss in the fluid flow. In this detailed guide, we will explore the Venturi meter, its parts, materials, working principle, equations, coefficient of discharge, types, applications, advantages, disadvantages, codes, and standards. How useful is this definition? You might find these chapters and articles relevant to this topic. These are considered fixed orifice since the hole in the tube (s) is a fixed size. Cd(FT) orifice taps at 1 inch upstream and 1 inch, downstream and beta (diameter orifice/diameter of meter at flowing temperature), Reynolds number (density x diameter x velocity/viscosity all in consistent units. 9 to about unity in the turbulent flow range and varies with the diameter ratio of throat to pipe. Orifice flowmeters continue to be a reliable and cost-effective solution for flow measurement in various industrial applications. Leak-check pump and post-pump components. See examples of ORIFICE METER used in a sentence. It is frequently used more than any other flow meter. It is simple, cost-effective, and highly accurate under the right conditions. 5. This makes the plates uni-directional, and to aid installation it is common for the paddle to indicate which Dec 19, 2023 · In petrochemical plants, flow meters are designed to enhance efficiency, improve safety, and meet regulatory compliance. With a properly selected orifice and a modern DP transmitter, a rangeability of 5:1 to as high as 14:1 is certainly possible. The Primary Device Jul 23, 2019 · Gas measurement professionals need to understand the fundamentals of orifice meters and how to use an orifice meter to ensure accurate orifice measurement of natural gas. The streamlines shown in Fig. Feb 10, 2023 · Orifice Meter An orifice meter is a type of flow meter that measures the rate of flow through a pipe by inserting an orifice plate between two pipe flanges and setting up a proper pressure connection. Jun 27, 2023 · An orifice meter is a type of flow measurement device that utilizes a precisely sized orifice plate to create a pressure drop across a flowing stream. An orifice meter consists of a plate with a small hole, known as an orifice, through which the fluid flows. Nozzles and orifices are often used to deliberately reduce pressure, restrict flow or to measure flow rate. A bubble meter with a temperature gauge is attached to the outlet of the metering system because any attachments to the inlet of the orifice affects its calibration. the pressure head (energy) is converted into kinetic energy in an accelerated flow. AI generated definition based on: Measurement and The most commonly used orifice plate for flow measurement is the square-edged, concentric bore orifice. The working principle of Orifice Meter is the same, like that of Venturi meter The orifice plate is being fixed at a section of the pipe, creates an obstruction to the flow by providing an opening in the form of an orifice to the flow passage. It is available for all pipe sizes but it is very cost-effective for measuring flows in larger ones (over 6" diameter). Orifices are widely installed in piping systems and hydraulic machinery to produce a regular and reproducible loss of pressure. Orifices are used to limit flow, or, in branching systems, to balance distributed flow, or to measure flow. This hole, or orifice, is designed to create a pressure drop in the flow of a fluid, which can then be measured to determine the flow rate. Here is a detailed note on orifice meters, including their components, working principle, types, advantages, and applications: Jun 3, 2025 · Orifice Meter is defined as when fluid passes through an orifice plate, the velocity increases, and pressure decreases. The continuity equation and Bernoulli’s equation quantitatively link the pressure drop to the velocity or flow rate of the flowing fluid. Jun 22, 2022 · Every one of you might have come across orifice plates. Oct 1, 2020 · Venturi meters and orifice meters are both types of differential pressure flow meters that are commonly used to measure the flow rate of fluids in pipes. It consists of an orifice plate that creates a restriction, leading to pressure changes that can be quantified. A vortex meter primary flow element produces a series of oscillations of pressure. Browse the use examples 'orifice meter' in the great English corpus. Jun 5, 2025 · Orifice plates are commonly used as a primary element in various types of Flow Meter assemblies because of their low cost, robustness, and ease of installation. Discover everything about the word "ORIFICE METER" in English: meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide. However, an orifice plate alone is not a complete flow meter; it requires additional instrumentation to translate the pressure signals into flow readings. Jun 6, 2020 · Orifice Meter Structure and Working:- Orifice Meter is an instrument which is used to measure average velocity of a flowing fluid or flow rate of a flowing. In this article, you will read about differential pressure, volumetric, and mass flow meters; as well as their working principles Feb 16, 2021 · Venturi Meter Definition: Venturimeter is a flow meter device or instrument that is used to measure the flow rate (discharge) in a pipe. Orifice plates are manufactured to stringent guidelines and tolerances for flatness bore diameter, surface finish, and imperfections in machining such as nicks and wire edges on the bore. Orifice meters are Orifice Meter Devices The primary purpose of the orifice meter and associated meter tube is to properly locate the square edged orifice plate in the flow stream and control the flow conditions upstream and downstream of the orifice plate to obtain accurate measurement. 3-0. As the fluid passes through the orifice, a pressure drop is created between the upstream and downstream sides. The coefficient of discharge for venturi meters ranges from 0. 65% An orifice plate is defined as a metal disc with a concentric hole that is inserted into a pipe to measure the volume flow rate of a fluid. The principle of a flow restriction creating a differential pressure is what is used in the orifice meter to measure the flow rate of liquids, steam and gases. an orifice meter An orifice plate is a thin, flat piece of metal with a precisely machined hole in the middle. In this article, you will learn the differences between a venturi meter vs. The pressure difference across the orifice is measured to determine the flow rate. Jul 26, 2021 · Orifice meter works on same principle as that of Venturimeter i. 2. When gas flows across the orifice, it creates a pressure differential. In Jun 5, 2025 · An orifice meter is a fundamental device used in fluid measurement systems across numerous industries. The value of measured Fundamentals of Orifice Meter Measurement Summary This white paper provides an overview of orifice meter technology, its advantages and general installation recommendations, as well as describes basic gas flow laws and the variables of orifice meter flow equations. It is a metallic disc that comes with a concentric hole and is put in the tube where fluid is moving. It operates based on Bernoulli’s principle, which describes the inverse relationship between the pressure and velocity of a fluid. The orifice plate has traditionally been regarded as having a maximum rangeability of 3:1 or 4:1. Remove or bypass the drying tube from the metering system. A meter run or meter tube is an assembly consisting of an orifice plate with flanges and calibrated upstream and downstream pipes. The orifice flow meter consists basically of: (a) A primary device, the orifice plate that creates the flow restriction (b) A secondary device that measures the differential pressure created by the orifice plate. Real-time insights regarding fluid movement help to develop sustainable practices and enable precise monitoring for optimal resource management. But if everything is done by the book, and you are using a flow computer or a multivariable transmitter you might get slightly better than 1% accuracy. In this article, we will explain how an orifice plate flow meter works, its components, advantages, limitations, and Jul 24, 2022 · An Orifice Meter is a device used for measuring the rate of now of a fluid through a pipe. Nov 7, 2023 · Fluid flow measurement is crucial in various industries and applications. Jun 11, 2012 · Always follow the manufacturer’s instructions for piston size if using the fixed orifice for HVAC refrigeration. The vena contracta corresponds to the narrow throat of a venturi tube. 2 indicate that the smallest flow area is downstream of the orifice plate. It operates on the principle of measuring pressure differences across a thin plate with a hole (orifice) inserted in a pipe carrying fluid. With the 3051SMV and dynamic compensation, 14:1 rangeability with 0. An hourglass is a form of orifice. Learn the definition of 'orifice meter'. 80 and varies with the diameter ratio. This comes from the pneumatic transmitter days when the transmitter limited the measurement range. One of the most commonly used flow meters is the orifice plate flow meter. Dec 29, 2024 · An orifice meter is a device used to measure the flow rate of a fluid (liquid or gas) through a pipeline. The orifice flow meter is a device widely used for flow measurement applications in the Oil & gas industry. Both meters are used to measure the flow rate of fluids in pipes by utilizing Bernoulli’s equation and fluid dynamics principles to calculate the flow rate. 7), explaining its impact on flow measurement accuracy and system efficiency. An orifice meter measures and controls the mass flow rate through an orifice for liquids in a tank and is extensively used in fluid mechanics allied applications such as Apr 9, 2025 · This post provides insights into the orifice beta ratio (0. When fluid flows through the orifice plate, a pressure drop occurs, and by measuring this pressure drop, the flow rate can be accurately determined. The precise location of the vena contracta for an orifice plate installation will vary with flow rate, and with the beta ratio (β A primary flow element is a device inserted into the flowing fluid that produces a physical property that can be accurately related to flow. The orifice flow meter is capable to measure the flow rate of both services (Liquid & Gas) and steam service. Orifice meters are built in different forms depending upon the application-specific requirement, The shape, size, and location of holes on the Orifice Orifice meter definition: . Click for English pronunciations, examples sentences, video. An orifice meter is a conduit and a restriction to create a pressure drop. This article provides calculation methods for correlating design, flow rate and pressure loss as a fluid passes through a nozzle or orifice. Specifications for the construction and installation of orifice plates, meter tubes, and associated orifice plate holding devices are provided, along with equations for computing Jan 28, 2025 · The orifice flowmeter consists of a thin, flat plate sandwiched between flanges or installed in a dedicated fitting. This article explores the differences between two common types of differential pressure flow meters: the Venturi meter and the Orifice meter. The Orifice Flange Union (OFU) was the only orifice plate holder available until the invention of the Orifice Fitting or Meter. Steven et al [1] showed the beta influence on 2” ≤ Ф ≤ 4” orifice meter wet gas flow over-readings small enough to be practically negligible. When a fluid passes through an orifice, the flow is often less than the amount calculated. The primary sensing element we use most widely for measuring the flow of fluids. It is a cheaper device compared to Venturimeter. Orifices and nozzles are typically used to deliberately reduce pressure, restrict flow or to measure flow rate. Flow Through an Orifice Consider the situation, illustrated in Figure , in which a horizontal jet of fluid emerges from an orifice in the side of a container. orifice meter synonyms, orifice meter pronunciation, orifice meter translation, English dictionary definition of orifice meter. As seen previously, the velocity through the orifice can be calculated by use of Equation 4. It consists of a thin metal plate with a centrally drilled hole, placed inside a pipeline. Orifice Meter Explained: A Key Instrument for HVAC Professionals In the world of HVAC, precision and efficiency are paramount. AI generated definition based on: Extrusion Problems Solved, 2012 Types of Orifice Plate Designs The orifice plate is a relatively inexpensive component of the orifice flow meter. Its one limitation is that its accuracy is about plus-minus two percent and can be near plus-minus five percent. Infographic Design Specifications: Four main device categories with technical icons Color-coded sections for easy identification Hierarchical layout showing device relationships Professional technical illustration style Clear typography for technical specifications Fixed orifice and capillary tube metering devices continue to serve important roles in cost-sensitive applications and systems Equation 2-49 also applies to orifices and nozzles. The flow pattern contracts as it approaches the orifice—the contraction continuing to a distance of approximately one orifice diameter downstream. The diameter of the orifice, Do, is usually half the diameter of the pipe. n engineering a plate having a central hole that is placed across the flow of a liquid, usually between flanges in a pipeline. Check out the pronunciation, synonyms and grammar. Orifice meters are a type of differential meter, all of which infer the rate of gas flow by measuring the pressure difference across a deliberately designed and installed flow disturbance. The orifice flow calculator estimates the flow rate of liquid discharged from a tank through an orifice. The orifice consists of a thin metal plate with a straight hole drilled in it. Let us discuss more details of the Orifice Meter such as the construction, working principle, different parts, and more… Jun 11, 2024 · Orifice flow meters are reliable, cost-effective devices for measuring the flow of fluids in pipelines across a wide range of industries and applications. Since the meter tube is manufactured as one unit, it is possible to optimally match all components with each other. Generally, the physical property Jul 24, 2024 · An orifice meter is a differential pressure meter that infers the flow by measuring the pressure drop over an obstruction inserted in the flow. The affect of wet gas flow on an orifice plate meter configured for gas flow service is complicated. Meter Tube – The straight sections of pipe, including all segments integral to the orifice plate holder upstream and downstream of the orifice plate. There are several different approaches and equations that are used in literature to estimate the pressure loss through an orifice for a specified flow rate. 60 to 0. Mm= molecular weight of gas flowing through the orifice meter, lb/lb-mole. Mar 11, 2009 · The accuracy of the orifice for example is depending on Beta ratio, straight runs of pipe etc. #orificemeter #Definitionoforificemeter #derivationoforficemeter Welcome to this complete and detailed video on the Orifice Meter – a vital topic in Fluid Me Orifice Meter definition Orifice Meter means an inferential meter that consists of an orifice plate perpendicular to the gas flow in a pipe. As the turbine meter, the orifice plate is an inferential meter, as it infers the volumetric flow rate by measuring a property of the flow stream. It consists of a thin, flat plate with a precisely machined hole (or orifice) placed in the path of the fluid. Oct 31, 2023 · What is an Orifice Meter? An orifice flow meter is used for measuring the pressure drop (differential pressure) as the fluid passes through the orifice plate. The orifice plate coefficient is generally affected more by misalinement and disturbed velocity distributions than other differential-pressure meters because the abrupt pressure changes take place near the plate. The plate has a precise, sharp-edged orifice, bored concentric with the pipe axis. Nov 2, 2023 · Different types of Orifice plate Taps are Flange Taps, Corner Taps, Vena contracta taps. Definition of Terms Primary Element – Defined as the orifice plate, the orifice plate holder with associated differential pressure sensing taps, the meter tube, and flow conditioner if used. This blog post will delve into the definition, function, and benefits of using Venturi and orifice meters are devices that reduce the pressure of a moving stream to measure its average velocity, volumetric flow rate, or mass flow rate. Orifice Meter: Differences and Similarities Venturi meters and orifice meters are among the most widely used obstruction flowmeters. This restriction causes a pressure drop, which can be correlated to the flow rate using established fluid dynamics principles. As the fluid passes through the narrowed section created by the orifice plate, its velocity increases and static pressure decreases. As the fluid approaches the orifice, it is forced to flow through the narrow opening, which causes the velocity of the fluid to increase and the pressure to drop. One of the simplest types is the orifice meter, which introduces a constriction in the flow using an orifice plate and measures flow rate based on the resulting differential pressure. The Venturi meter and the Orifice meter both operate on the same principles. The document details its construction, types, working principles, advantages, disadvantages, and applications in Jul 15, 2020 · An orifice meter is a widely used device for measuring the flow rate of fluids in a pipeline. There are different types of flow meters used in various industries to measure fluid flow rates. Engineering a plate having a central hole that is placed across the flow of a liquid, usually. An orifice meter is a device with a hole in it, which measures how fast a fluid is flowing, by recording the pressure decrease across the hole. While there are May 12, 2025 · The orifice meter uses a flat plate with a small hole (orifice) placed in the flow path. Instead of using the orifice meter coefficient Km, the term ΔH@ was derived to reflect the general sampling conditions of sampling trains and orifice meters designs with a calibration constant that could be related to the desired flow rate. The coefficient of discharge for orifices in pipes varies from 0. The orifice plate flow meter is commonly used in clean liquid, gas, and steam services. '' The jet is bound to narrow in May 29, 2024 · Explore the principles, accuracy, and design of orifice plates for flow measurement in industries like oil, gas, and water treatment. The electronic expansion valve. Understanding the working principles, advantages, limitations, and practical considerations of orifice flow meters is essential for selecting, installing, and maintaining these instruments Apr 3, 2024 · An orifice plate or Orifice Meter is a thin, flat plate with a centrally located hole or orifice. Define Orifice Meter. It consists of an orifice plate with a circular opening that is concentric with the pipe. Jun 5, 2025 · How Do Orifice Plate Flow Meters Work? The operation of an orifice plate flow meter relies on Bernoulli’s principle. Secondary May 8, 2025 · The orifice meter works by inserting a flat plate with a circular hole (orifice) at the center inside the pipe. This pressure difference is measured using pressure taps, and from that, the flow rate is calculated. The orifice plate is also approved by many organizations for custody transfer of liquids and gases. Apr 6, 2022 · An orifice meter [1, 2, 4, 6, 7] is used in measuring the flow rate of a fluid through a pipe. The pressure difference The orifice meter is a device used to measure the flow rate of fluids in a pipe, operating on Bernoulli's principle, which relates pressure drops to fluid velocity. An orifice plate is a device used for measuring flow rate, reducing pressure or restricting flow (in the latter two cases it is often called a restriction plate). The Venturi meter stands out as a reliable and versatile device for precise flow rate measurements. The orifice, nozzle and venturi flow rate meters makes the use of the Bernoulli Equation to calculate fluid flow rate using pressure difference through obstructions in the flow. Capillary tubes (cap tubes) are also used to meter refrigerant to the evaporator coil. The orifice plate flowmeter and Bernoulli’s Theorem When Bernoulli’s theorem is applied to an orifice plate flowmeter, the difference in pressure across the orifice plate provides the kinetic energy of the fluid discharged through the orifice. Orifice meter is a thin plate with a central narrow aperture which is introduced in a pipeline. 10:. means an inferential meter that consists of an orifice plate perpendicular to the gas flow in a pipe. 1. Venturi Meter vs. Thus, orifice meter works on the principle of converting pressure energy (head) into kinetic energy by reducing cross-sectional area of flow passage, This leads to pressure difference, which is This article provides a comprehensive comparison between the venturi meter and the orifice meter, exploring their advantages, disadvantages, and applications in fluid flow measurement. The venturi meter is invented by Clemans Herchel who was an American Hydraulic engineer. The orifice plate calculations used nowadays still differ from one another, although Orifice meter: •Reduction of cross-section of the flowing stream in passing through orifice increases the velocity head at the expense of pressure head •Reduction of pressure between taps is measured using manometer Complications: •Formation of Vena-contracta- Fluid stream separates from the downstream side of the orifice plate and forms a free-flowing jet in the downstream side This paper describes the effects of pulsation on orifice, turbine, ultrasonic, and other flow meter types. The metering device uses an orifice plate, strategically placed in the flow stream, to create a pressure difference, enabling fluid flow measurement. Jan 30, 2021 · The orifice plate is a device used for measuring flow rates with pressure losses. Therefore, with the orifice plate meter being such a popular gas flow meter it is by default the most common wet gas flow meter. The following procedure was used to select and calibrate the critical orifices. It operates based on the principle of restricting the flow through an orifice, creating a pressure difference across the orifice that can be correlated with the flow rate. Oct 6, 2023 · An Orifice Flow Meter, also known as an orifice plate flow meter, is a device widely used to determine a fluid's flow rate within a pipeline. Orifice meter definition: . Orifice Flange Unions consist of two ANSI-rated flanges (usually weldneck, but slip-on or threaded types are also available) with associated flange bolts, nuts, and gaskets. Jan 27, 2024 · An orifice meter is a widely used device for measuring the flow rate of fluids in pipelines. As shown in the figure, the jet narrows over a short distance beyond the orifice that is comparable with the jet diameter to form what is generally known as a vena contracta --that is, a ``contracted vein. May 10, 2025 · An orifice meter is a type of differential pressure flow measurement device commonly used in civil and mechanical engineering. Venturi Meter and Orifice Meter Overview Flow measurement is a crucial aspect of fluid dynamics, and two popular devices used for this purpose are venturi meters and orifice meters. An orifice is defined as an opening in a plate at the end of an extruder barrel through which extrudate flows into the environment, with its shape largely determining the shape of the extrudate. This article gives typical values of the discharge coefficient for common orifice and nozzle designs. It also works on the same Bernoulli’s principle as that of the Venturimeter. The venturi meter is used in the water supply industry and It works on the basis of the Bernoulli theorem. They generally consist of orifice plate, meter tube and orifice plate housing Mar 31, 2025 · An orifice plate flow meter is a type of differential pressure flow meter that measures the flow rate of a fluid in a pipe or duct. Understanding the instruments that help achieve these goals is vital, and one such instrument is the orifice meter. What is Orifice Meter? Orifice Meter (Orifice Plate): Definition, Types, Parts, Application, Working Principle, Components, Advantages & Disadvantages :- An orifice is defined as the device which is used for measuring the rate of flow of a flowing fluid, for restricting flow or for reducing pressure through a pipe. Dec 11, 2024 · Flow meters are essential instruments in many industries for measuring the flow rate of liquids, gases, and steam. It is typically installed in a pipe or duct to measure the flow rate of liquids, gases, or steam. Orifice plates are one of the most popular devices for the measurement and control of fluid flow. An orifice plate is used to create the differential pressure in the process line by acting as an obstruction for flow. It is available for all pipe sizes but it is very cost-effective for measuring flows in larger ones (over 6 inches diameter). This article provides information on Orifice Tapping Location. Transmitters and transducers measure the pressure differential, static pressure, and other variables to determine the flow rate. Nov 1, 2023 · An Orifice Meter is used to measure the rate of flow of Liquid, Gas, or steam using the differential pressure measurement principle. As a type of Flow Meter, it is designed to measure the flow rate of liquids and gases by introducing a restriction (an orifice plate) into the flow. The pressure difference An orifice gas meter consists of a straight length of pipe inside which a precisely known orifice plate creates a pressure drop, thereby affecting flow. 3c7g gzbkb mk2 m1bq 2hg1 figiu1 cpmnsj ja8 gegzqkkh vljs