Describe the construction of orifice plate flow meter.

Describe the construction of orifice plate flow meter. 
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1 Answer

Answer :

It is variable head flow meter in which the differential pressure is developed by using orifice plate by inserting it in the path of the fluid flow. 

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Orifice meter is as shown in fig Pressure difference is measure between two sections 1&2. The arm at inlet of the manometer is located at a distance far away from the orifice plate whereas the other arm is at nearby distance of the other side of orifice plate. U tube manometer is used for measurement of differential pressure. Thus differential pressure (p1-p2) is directly proportional to the flowrate.

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