Since 1977

Ozone & Advanced Oxidation Systems  


Dynamic Venturi Injector™

(V3 Injector PZ-684, PZ-784, PZ-884)

(Printable Brochure)

Prozone's V3 Patented Dynamic Injector technology is a state-of-the-art water/ozone mixer which provides maximum mass transfer of gaseous ozone or liquid chemicals into water with minimum back pressure. A patented dynamic adjustable orifice can be optimized for extended performance and optimization of gas/liquid mixing. Constructed of an ozone/chemical resistant polymer, it has two ports with an internal 360º orifice mixing chamber which provides complete dynamic mixing. Each 1/4" port has a built in ozone resistant check valve built into it.

The V3 Injector is offered with the following water interface options:

  • 3/4" tube barb connections (standard)
  • 1/2" pipe male slip connection

Performance Specifications

Pressure across injector (PSI) vs air suction (CFH)

  1 PSI 2 PSI 3 PSI 8 PSI
PZ 684 1 CFH 2 CFH 3 CFH 5 CFH
PZ 784 2 CFH 4 CFH 6 CFH 14 CFH
PZ 884 3 CFH 6 CFH 9 CFH 20 CFH

Dynamic Injector Theory

Injectors appear to be simple devices, but in fact must be carefully constructed to maximize the ozone mass transfer into the water. The fundamental requirements for efficient mass transfer are:

  • The injector must operate at very low flow rates as well as high flow rates
  • Maintain a nearly constant water to air/ozone ratio (frothing ratio) as flow increases
  • Generate micro-bubbles at the venturi orifice
  • Restrict air flow at the venturi orifice to increase the injection pressure

The inlet water to the injector is reduced at a specific rate until a specified minimum diameter (throat) is reached. The water is mixed with the ozone/air mix at the throat through a narrow annular gap orifice, creating very small bubbles with eddy currents. A vacuum is created by immediately expanding the water and air/ozone mix after the throat with a specific expansion rate in the outlet portion of the injector. This decompresses the water and air/ozone mix causing rapid ozone mass transfer into the water. The expansion also smooths the water flow — allowing the bubbles to be sustained in the water by maintaining the proper ratio of water to air/ozone ratio thus maximizing the efficiency of ozone mass transfer.

To meet the requirements for efficient ozone transfer, the injector is constructed with the following features:

  • ASME injector flow configuration to minimize water pressure drop
  • Adjustable 360° annular injection orifice
  • Built in restriction at the injection orifice to increase the injection velocity and maintain a constant frothing ratio
  • Dynamic injector elements for the production of micro-bubbles
  • Dual injector ports to maintain the froth ratio as water pressure increases and allow the mixing of chemicals
  • Rugged construction with multiple connection options
  • Variable gap width to modify dynamic range
  • Internal premixing cavity for dual ports

Patents #5,075,016; #6,192,911; #6,426,053; #6,342,154 and patents pending

Commercial Systems
Degas Column with
Contactor System


  • up to 50K Gal.

    PZ2-6 to PZ2-48
  • 75K to 600KGal.
  • Rack Systems
  • Turnkey Ozonation

    PZC Corona Discharge Series


    Parts & Accessories

    Mycropore Diffuser

    Venturi Bypass Kit

    Venturi Injectors

    Plug Selection Guide

  • Contact Us | Terms of Use | Privacy Policy | Order Page | Site Map