| 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. |