Venturi Injectors

cpvc venturi eductor

 CPVC Venturi


Venturi Injectors (Eductors)

Works by forcing water through a conical body which initiates a pressure differential between the inlet and outlet ports.  This creates a vacuum inside the injector body, which creates suction at the injection port.  The chemicals that are injection are rapidly dispersed through this high velocity “rapid mix” section. 


  • High chemical diffusion (up to 95%)
  • Excellent choice for gas/liquid injection (Ozone, CO2, Oxygen, Air)
  • Does not easily plug or lose efficiency over time compared to a porous injector        
  • No moving parts
  • Low cost

flanged SS venturi eductor


Flanged SS venturi eductor

Eductor Specifications and Sizing Guide

eductor drawing       Eductor Performance Data      Eductor Sizing

Select an image Download:

Eductor Drawing (52 kb)  

Eductor Performance Data (32 kb)

Eductor Sizing Guide (31 kb)

SS stainless venturi eductor w unions


kynar pvdf eductor venturi

Kynar (PVDF) Venturi Eductor


PVC Venturi Eductor


PVC Eductor

pvc eductor



Dilution System Using a Venturi Eductor

The dilution system shown below is for diluting 12.5% sodium hypochlorite (NaOCl) to a more stable 3-5% concentration solution for potable water disinfection.  The eductor combines the two flows of potable water and concentrated NaOCl and thoroughly mixes the flows before being stored in a storage tank.Turning the dilution system on is simple.  The water valve is turned on.  This motive water will draw the concentrated NaOCl from a tank or carboy without the use of pumps.

Bulk sodium hypochlorite dilution system

Drawing of eductor based dilution system  pdf  Eductor based dilution system panel (21 kb)


Batch Mixing Using a Venturi Eductor

Mixing chemicals with venturi eductor--batch process

Download Batch Dilution Diagram

Download Batch Dilution Drawing Download Batch Dilution Diagram (25 kb)

chloramination contactor with dual venturi design

(Above) Chloramination (aqua ammonia & chlorine) dual venturi design for producing high quality monochloramine with few DBP's.  Ammonia is mixed with water in first chamber and allows for dilution of chemicals to prevent higher levels of chloramine.