Compare variable head flow meter with variable area flow meter.

Compare variable head flow meter with variable area flow meter.
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1 Answer

Answer :

Parameter
Variable head flowmeter
Variable area flowmeter
Working principle
Restriction or obstacle is placed in the path of flow to create a differential Pressure.
The pressure difference is kept constant by changing the restriction area.
Basic Construction
The construction depends on the type of primary element used. Accordingly these are of the following types 1) Orifice plate 2) Venturi tube 3) flow nozzle
Tapered transparent glass tube with lesser diameter at the bottom fitted with a metal float inside, called rotameter.
Maintenance cost
minimum
minimum
Use
Used in viscous fluid slurries and dirty fluids.
In laboratories and testing and production lines.
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