Different Types of Fluid Flow Measurement Devices

Following are the different types of fluid flow measurement devices which are available for the flow rate measurement. 
  • Orifice Plate
  • Venture Tube
  • Flow Nozzles
  • Variable Area

Orifice Plate
Advantages of Orifice Plate
•Orifice plate is very simplest instrument available which is also very easy to install and remove
•Have high pressure recover efficiency of 65 percent
•Have the ability of measure flow rate over a wide rage
•Cost effective

Disadvantages of  Orifice Plate
•It only support those fluid that are homogeneous is nature
•It work under a limited viscosity of fluid
•Accuracy of orifice plate depends on fluid density, viscosity and pressure
•Working limited to horizontal applications

Venture meter 
Advantages of Venture meter
Offer horizontal, vertical and inclined flow measurement
Perfect working behavior prediction
Very high pressure recovery efficiency of 90 %
Highly accurate for a wide range of flow rates

Disadvantages of Venture meter
•Required more space for installation as they have large is size due to their working method
•Have high initial cost 
•Difficult to install and remove
•Have limitation of minimum pipe diameter of 7.5 cm

Flow Nozzle

Advantages of Flow Nozzle
•Small in size as compared to venture meter
•Easy to install and remove
•Cost effective
•Discharge coefficient of flow nozzle is high

Disadvantages of Flow Nozzle
•Pressure recovery efficiency is low
•High maintenance cost
•Required more area as compared to orifice plate

Variable area

Advantages of Variable area
•Offers constant drop in pressure over the length of tube
•Simple construction
•Easy to install and maintain
•Work perfectly for liquid and gas

Disadvantage of Variable area
•Work only in vertical direction
•Transparent material is required for construction
•High pressure loss
•Limited rage for fluid viscosity

Four different types of flow measurement devices has been present above with their advantages and disadvantages and according to those venture meter is the best choice for the flow measurement devices, as it has highest value of pressure recovery efficiency, offer flow rate measurement in any direction and can work in wide range of flow rate. It has high cost and difficulty in installation but that’s one time cost for a flow measurement devices

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