Difference between venture tube and orifice plate

Venture tube Orifice plate
The venture tube consist of three parts i.e. inlet cone, throat and outlet cone. The orifice plate is a thin circular plate.
The venture tube is made up of cast iron or steel. The orifice plate is made up steel, monel and phosphor bronze.
It can handle suspended solids and liquids. It can handle liquids, gases, low velocity vapours etc.
Permanent pressure loss is very less. Relatively high permanent pressure loss.
It is used for high flow rates. It is used for low flow rates.
It is not suitable for small sized pipes. It is used for wide range of pipes.
Quite expensive in installation and replacement. It is easily replaced.

 

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