The Mazzei venturi injector is the most widely used method for dissolving ozone gas into water, and, for good reason.  This is the most efficient and simple method to get ozone gas to dissolve into water.

Most ozone injection systems will use a Mazzei venturi to dissolve ozone into water.  If you are replacing a venturi injector, check the center of the bottom of the venturi (below the suction port) for a part number.  It will be 3 or 4 numbers long.  If you cannot find this, or if you are building your own system and need help sizing a venturi, please give us a call.

Venturi Injectors use a pressure differential of the water to pull ozone gas into the water.  Using internal mixing vanes, water and gas are further mixed on the outlet of the venturi. 

How a Venturi Injector Works:

Click HERE to see a video on how the venturi injector works

A venturi injector pulls ozone/oxygen gas into the water stream under a vacuum and dissolves that ozone/oxygen gas into water very efficiently.  A pressure differential across the orifice in the venturi creates a high-velocity jet stream of water.  This high velocity of water results in a decrease in absolute pressure and creates a vacuum on the third leg, or gas suction let.  This gas is quickly and efficiently dissolved into the water directly after this venturi.

Ozone/Oxygen gas is pulled into the water.  The gas fills the void created by the suction action of the venturi to entrain the gas bubbles into water very efficiently.

Connection Sizes:

0.50" Flanged Suction Port Connection

Venturi Injector Performance:

A venturi injector will operate over a wide range of pressures and water flows, however, each ozone injection application should be evaluated to ensure the right injector is chosen for your specific application.  Below is a performance chart for air/ozone suction into water based on water flow and pressure on the venturi.

Click HERE for complete Mazzei Venturi Injector Performance Tables (all mazzei venturi's are in one table)

For questions on how to size the right venturi injector for your specific application call our application engineers. We would be glad to help.

Diagram of Mazzei Venturi Injector Parts

Ozone Solubility Information:

    -O3 Solubility in Water

    -Fundamentals of Ozone Solubility

    -O3 Dosage vs. O3 Dissolved

    -Compare Venturi to Diffusers

    -Bubble Diffuser to Dissolve O3

    -Venturi Injector to Dissolve O3

    -Static Mixer to Dissolve O3

    -How to Read Venturi Charts

Tech Notes:

    -Complete Mazzei Venturi Injector Performance Tables (all mazzei venturi's are in one table)

    -Tech Note - Injector Troubleshooting Guide

    -Tech Note - Injector Ozone to Water Mixing

    -Tech Note - Correction Factor for Gas Flow When Gas is Under Pressure

    -Tech Note - Handling Solids During Injector and Nozzle Mixing 

    -Tech Note - Installation Notes

    -Tech Note - Pressurized Sprinkler Applications

    -Tech Note - Pressurized Water Line Applications

    -Tech Note - Removal of Hydrogen Sulfide by Aeration

    -Tech Note - Removal of Iron and Manganese by Aeration

    -Tech Note - Water-Well/Pressure Tank Applications