The Uses of the Venturi Meter

The Uses of the Venturi Meter
••• Albert171/iStock/GettyImages

A venturi meter is also called a venturi flowmeter. It is used to calculate the velocity of fluids in running through a pipeline. The fluid may be a liquid or a gas. The meter consists of a pipe with a narrowing throat that expands back to it's original diameter on the other side of the choke point. The venturi meter calculates velocity by measuring the pressure head at both points before and after the narrowed throat.


Venturi meters are used in pipelines at wastewater collection systems and treatment plants. They are used in wastewater pipes because their overall design structure allows for solids to pass through it instead of collecting in front of it. Less buildup in the pipes allows for more accurate readings of the pressure of the wastewater and thus its velocity.

The Flow of Chemicals in Pipelines

The temperatures and pressures of chemicals in a pipeline do not affect the accuracy of a Venturi flowmeter and because of this they are used in crude oil pipelines. Crude oil pipelines, such as the ones in Alaska, are exposed to extreme temperatures during the long arctic winter months. Another advantage of using the Venturi meter in such volatile and frigid environments is that it has no moving parts; there is no risk of them freezing and breaking due to thermal expansion.


The venturi in carburetors is used to measure airflow in a car engine and to ensure that a correct amount of fuel is fed to the gas combustion engine when needed during driving. The air and fuel mixture must be evenly distributed to the engine in order for it to work properly. The temperatures of air and fuel are constantly changing due to the shift in temperatures that occur in an engine during idling, acceleration, high speeds, and low speeds. The venturi meter allows the carburetor to adjust and calibrate the distribution of fuel and air to the engine as needed.

Related Articles

What Refrigerants Are Flammable?
How to Calculate Steam Velocity
What Is a Centrifugal Blower?
Hydraulic System Disadvantages
Specifications of the E-Z-Go Engine
What Is Butane Fuel?
What Units Does the Anemometer Measure In?
How to Convert CV to GPM
Does Neoprene Stretch?
Advantages & Disadvantages of Rotary Screw Air Compressors
What are Gehl 4625 Skid Steer Specifications?
Definition of Hydraulic & Pneumatic Systems
Types of Mixing Valves for an Oil Furnace Boiler
How to Calculate the CFM of a Blower
Can Diesel Fuel Tanks Be Stored Inside Buildings?
How to Convert Gas Pressure to BTU
Uses of Diesel Oil
Information on Ford 3000 Tractors
What Is an Instrument Which Measures the Pressure of...