Difference Between Orifice And Venturi Meter Pdf

difference between orifice and venturi meter pdf

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Venturimeter and orifice meter. The throat and the inlet has been connected to mercurymanometer for the pressure readings. This helps us find out the velocity at the various cross sections and.

The term pipe flow rate is often used to refer to flow rate for any closed conduit flow under pressure. The closed conduit is often circular, but may also be square or rectangular, such as a heating duct.

Flow measurement: pitot tube, venturi meter and orifice meter

Differential pressure restriction nozzle orifice plate venturi flow meter. Many sizes of venturi pump, venturi meter , venturi flow meter. It is manufactured using premium grade stainless steel and aluminum sourced from trusted and reliable dealers.

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These items are essential for measuring gases and liquids. They aid in keeping stock of availability and are used in a variety of commercial contexts to determine quantities. The choice of these depends on whether the volumetric or mass flow rate is to be measured..

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An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow in the latter two cases it is often called a restriction plate. An orifice plate is a thin plate with a hole in it, which is usually placed in a pipe. When a fluid whether liquid or gaseous passes through the orifice, its pressure builds up slightly upstream of the orifice [1] but as the fluid is forced to converge to pass through the hole, the velocity increases and the fluid pressure decreases. A little downstream of the orifice the flow reaches its point of maximum convergence, the vena contracta see drawing to the right where the velocity reaches its maximum and the pressure reaches its minimum. Beyond that, the flow expands, the velocity falls and the pressure increases. By measuring the difference in fluid pressure across tappings upstream and downstream of the plate, the flow rate can be obtained from Bernoulli's equation using coefficients established from extensive research. Orifice plates are most commonly used to measure flow rates in pipes, when the fluid is single-phase rather than being a mixture of gases and liquids, or of liquids and solids and well-mixed, the flow is continuous rather than pulsating, the fluid occupies the entire pipe precluding silt or trapped gas , the flow profile is even and well-developed and the fluid and flow rate meet certain other conditions.

Very good presentation, it is in detail no doubt. Please keep on writing such kind of beautiful articles. Very easy Language it's comparision, Thank you for helping web Share your reading experience here. Flow is one of the crucial process variables that is needed to be measured, transmitted, manipulated and controlled in order to ensure safety and success of a given process in process control ind ustr ies.

To browse Academia. Skip to main content. By using our site, you agree to our collection of information through the use of cookies. To learn more, view our Privacy Policy. Log In Sign Up. Download Free PDF. Flow through a venturi meter Orifice rotameter.


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Pipe Flow Measurement with a Differential Pressure Flow Meter like the Orifice or Venturi Meter

Differential pressure restriction nozzle orifice plate venturi flow meter. Many sizes of venturi pump, venturi meter , venturi flow meter. It is manufactured using premium grade stainless steel and aluminum sourced from trusted and reliable dealers.

Venturi vs Orifice. Orifice meters and Venturi meters are devices that are used to measure the pressure of flow of fluids. Both of them are differential pressure flow meters and work by placing a constriction in the flow of liquid. As fluid passes this constriction, its velocity increases according to Bernoulli Equation, which says that as elevation cannot change in a pipe, if the pressure decreases, the velocity of flowing fluid inside a pipe increases. This principle is used both in Venturi as well as orifice meters.

Flow is defined as the rate volume or area per unit time at which a substance travels through a given cross section and is characterized at specific temperatures and pressures. The instruments used to measure flow are termed flow meters. The main components of a flow meter include the sensor, signal processor and transmitter. Flow sensors use acoustic waves and electromagnetic fields to measure the flow through a given area via physical quantities, such as acceleration, frequency, pressure and volume. As a result, many flow meters are named with respect to the physical property that helps to measure the flow.

4 COMMENTS

Г‰lГ©onore S.

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An orifice meter is a piece of equipment used to measure the flow rate of a gas or a fluid.

PrГЎxedes V.

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Tonya L.

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has a precisely measured hole.

Audric L.

REPLY

Very good presentation, it is in detail no doubt.

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