Series 4000 Static Mixers

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Series 4000 Static Mixers are designed to mix fluids in an open channel.

This is only practical in most cases if there is a small hydraulic step. This is provided by using the technology of the 3050 Series Low Head Loss Static Mixers.

Head loss can be further reduced by adding inlet and outlet diffuser cones.

These mixers are designed to be built into penstocks or stopboards that are then installed in the open channel. In this way they can be easily lifted from the channel for inspection if required.

They are designed to be an alternative for motor driven (shaft and submersible) mixers where there is an exisitng flow due to the process.

The advantages are:

  • No power consumption
  • Excellent mixing
  • Reduced maintenance costs (no motors, bearings, oil seals etc)
  • No ragging and clogging of impellors
  • No moving parts
  • Long service life
  • The small (but predictable) hydraulic step can be measured and translated to a flow measurement.

H2O Rx's engineers will assist with all the engineering, sizing, and specification of the complete design - from concept to reality.

Series Brochure Description Diagram
Series 4000 A static mixer made for installation into an open channel 4000 Series


Westfall Manufacturing Series 4000 Mixers are designed and built to meet your needs:

Common materials for 4000 Series mixers are:

  • FRP
  • 316 stainless steel


  • Water treatment - Chlorine Contact Tanks (CCT's) in both chlorination and dechlorination zones
  • Waste Water Treatment - Mixing Coagulants (eg Ferric Chloride) at the inlet to Primary Sedimentation Tanks (PST's) and clarifiers.

Additional Resources

Description File Size

Get from your DVD or Intranet

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Get it from the Clouds

(requires internet connection)

Series 4000 Open Channel Static Mixer CFD Model 500 KB Westfall Model 4000 Open Channel Mixer  
Alden Research Laboratory CFD Report 1 MB 411527-1R1 411527-1R1

To request a DVD, click here.

H2O Rx
PO Box 748
Lane Cove NSW 1595


+61 409 784 236


Last Updated: 8 February, 2018