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What is a Venturi Vacuum?

The Venturi vacuum is caused by a restriction in air pressure that is caused when air or fluid flows passes through a choked or constricted section of a pipe. Venturi vacuums generate vacuums by utilizing a Venturi chamber meant to move fluids or gases via a narrow section of a pipe. They don’t contain any moving parts or rely on any other force apart from the compressed fluid or gas.

What is a Venturi vacuum


Generator | Air compressor | Pump

How the Venturi vacuum system works

A Venturi system decreases pressure and increases velocity when a gas or fluid flows through a constricted section of a pipe.

Giovanni Battista Venturi is credited with building the first Venturi tube and pump. In 1797, he was doing experiments on the movement of fluid in a cone-shaped tube. He subsequently collected and published some of Galileo’s letters and manuscripts.


The Venturi vacuum is generated by a pump with constricted gases passing through it, but the pump doesn’t have any moving parts. Constricted gases move through the first chamber, before running through a smaller device that connects to a bigger chamber, which resembles the initial one.

Air compressor

When it comes to fluid dynamics, the velocity of an in-compressible gas or fluid should increases as it runs through a constricted section based on the continuity principle, and pressure should reduce based on the Bernoulli’s principle (also known as the law of conservation of energy). As such, any increase in kinetic energy the fluid might achieve due to its increased velocity via a constriction is counterbalanced by the decrease in pressure. By determining pressure, the rate of flow can be calculated, just like in different flow measurement devices like the Venturi meter. The absence of moving components helps to increase the life expectancy with minimal maintenance demands. Since the Venturi pumps are powered by air, they don’t rely on any lubricant or source of electric power.Position the vacuum pumps near the application for optimal vacuum efficiency and quick response times. The new pumps rely on the Venturi effect. A jet of compressed gases or liquids passes through a constricted pipe as the drop in pressure allows air to pass via a vacuum port. To see practical uses for this system see our vortex tube designs.


Venturi vacuums can be observed in a variety of industry applications. The most common applications include evacuating vapors or fumes from a vessel, drum pump, pump priming, air conditioning service, siphon initialization, and machining operations such as pick-and-place, surface mounting, and clamping. Atomizers, Venturi meters, cargo eductors, water aspirators, foam nozzles for firefighting, protein skimmers and removing water from bilges are some of the commercial applications of the Venturi effect in today’s world.


License: Creative Commons Attribution: HappyApple – Wikimedia Commons