Answer / sam

Orifice plate is a fluid flow measuring device. It works on
the following principle.
Flow rate(Q)= sqr rt (Differential pressure).

When the fluid flows across the orifice plate it will create
the differential pressure,, based on the nozzle action
principle. ie.., The pressure in the upstream is more than
when compared to the pressure in the down stream. why
because the orifice plate will create a trap for the normal
fluid flow, so before orifice plate the velocity of the
fluid will be less and the pressure is more., due to the
change of kinetic energy to potential energy,. and after the
orifice plate the fluid particles will try to regain their
energy back so after orifice plate the velocity will be more
and the pressure will be less., thus the differential
pressure is created.
And by using the SQUARE ROOT EXTRACTION PRINCIPLE we are
converting this differential pressure in to flow.

Four types of orifice plates are there.
1) concentric
2) segmental
3) essentric
4) quadrant

Answer / aanisha

it is used to measure the flow rate in pipeline

Answer / rahul nayak

orifice plate is used in liquid flow lines to measure the
flow rate by creating a differential pressure across it,
which is than converted in to flow rates by means of some
circuits. in some cases it is also used to reduce the
pressure in line.

Answer / ashish

orifice plate is basically a hollow metal plate used to measure the flow of liquid .It is based on variable differential pressure method in which when the fluid flows through an obstruction then differential pressure is setup across the orifice plate and that differential pressure is the
is the measure of velocity of flow...

Answer / manick

orifice plate is dp create the primeary flow
element.

why are use only 4 to 20ma. signal.

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