Mechanical Engineering

Applications of orifice meter?

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2012-07-02 08:05:03
2012-07-02 08:05:03

1.to measure the flow rate of gases and fluids

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(to check the flow rate of water ... calculate the pressure drop


Venturi meter --- Highest Rota meter Orifice meter---- lowest


Orifice meter is a flow measuring device used for calculating the pressure drop,flow rate and behaviour of the fluid moving through the pipe.


This should help: http://www.engineeringtoolbox.com/orifice-nozzle-venturi-d_590.html


The calibration curve for an orifice meter will depend on the size of the orifice, the size of the pipe and the pressure loss over the meter. Typical calibration curves have pressure (or head) loss on the vertical (y) axis and flow rate on the horizontal (x) axis.


In Venturi meter losses are less so coefficient of discharge is higher whereas in orifice meter due to no convergent and divergent cones there are more losses and hence its coefficient of discharge is less.In venturi meter losses are low due to steamline shape of the diffuser and the pressure gradient is not abrupt as in case of orifice meter.


He didn't invent it. He didn't invent anything.


Because it relies on the back pressure through a known orifice which its differential pressure across the plate relates to flow.


orifice meter is used for measuring volume flow rate air.


The orifice plate can easily be changed to accomodate widely different flow rates, whereas the throat diameter of a venturi is fixed, so that its range of flow rates is circumscribed by the practical limits of Dp.The orifice meter has a large permanent loss of pressure because of the presence of eddies on the downstream side of the orifice-plate; the shape of the venturi meter prevents the formation OS these eddies and greatly reduces the permanent loss.The orifice is cheap and easy to install. The venturi meter is expensive, as it must be carefully proportioned and fabricated. A home made orifice is often entirely satisfactory, whereas a venturi meter is practically always purchased from an instrument dealer.On the other hand, the head lost in the orifice for the same conditions as in the venturi is many times greater. The power lost is proportionally greater, and, when an orifice is inserted in a line carrying fluid continuously over long periods of time, the cost of the power may be out of all proportion to the saving in first cost. Orifices are therefore best used for testing purposes or other cases where the power lost is not a factor, as in steam lines.However, in spite of considerations of power loss, orifices are widely used, partly because of their greater flexibility, because installing a new orifice plate with a different opening is a simpler matter. The venturi meter can not be so altered. Venturi meters are used only for permanent installations.It should be noted that for a given pipe diameter and a given diameter of orifice opening or venturi throat, the reading of the venturi meter for a given velocity is to the reading of the orifice as (0.61/0.98)2, or 1:2.58.(i.e. orifice meter will show higher manometer reading for a given velocity than venturi meter).


A restriction in a pipe between two pressure taps; by attaching a pressure gauge the airflow can be determined


Applications of pH meter are primarily in the following areas: 1. hospitals 2. universities 3. pharmaceutical companies 4. research institutes or laboratories


no applications just measures the energy consumesd and not able to measure the power factor.... :-)


An orifice is a hole (as in "anus orifice"). A propane orifice could be created using brass. Consult your local professional.


Henry Palmer Westcott has written: 'Measurement of gas and liquids by orifice meter' -- subject(s): Natural gas 'Measurement of gas by orifice meter' -- subject(s): Gas-meters, Natural gas, Natural gas. 'Hand book of natural gas' -- subject(s): Natural gas


Orifices is the plural of orifice


The vaginal orifice is the opening of the vagina


An orifice is an opening, cavity, or hole.


That is the cirrect spelling of orifice (a hole or opening).


An obstruction (orifice) is placed in a pipe filled with fluid. The pressure of the fluid is measured at two different points: 1) just upstream of the orifice and, 2) close to the contraction of the fluid (vena contracta). The difference in these two pressures is known as differential pressure. The differential pressure across an obstruction (orifice) in a pipe of fluid is proportional to the square of the velocity of the fluid. Many factors associated with the pipe, orifice and fluid affect the measurement. Satisfactory measurement requires steady-state, homogeneous, turbulent flowing fluids. Other properties which affect the measurement include: the ratio of pipe diameter to orifice diameter and the density, temperature, compressibility and viscosity of the fluid.


If you mean an "orifice tube", then yes.


Some units use orifice tubes and some units use thermostatic expansion valves to meter the refrigerant, but in either case it will be found between the condensation coil and the evaporator coil. Usually just before entering the evaporator coil.


to know the ph of blood,certain medicines,water for drinking etc.


generally vena contracta is formed at distance of d/2 from orifice where d is diameter of orifice.




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