Static Mixers

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H2O Rx custom build a range of static mixers - wafer-style, variable flow, low headloss, and open channel mixers - in many materials and sizes to suit fluid applications in most industries.

K Value (kV) for headloss coefficient, Coefficient of Variation (CoV) for amount of mixing, Computational Fluid Dynamics (CFD) reports, white papers, and material certificates are available for all H2O Rx's static mixers to ensure that you are confident in each mixer for your application.

H2O Rx is the exclusive Australian licensee and distributor of the Westfall Manufacturing range of static mixers manufactured in both Australia and USA.

Types of Static Mixers

There are seven varieties of static mixer in the range. These are:

Series Description Diagram
Series 2800

Wafer-Style Static Mixer - standard mixer that slots between two flanges for space saving mixing and low material costs. Excellent mixing, completes within 10 pipe diameters.

Beta Plate K-Value CoV
0.7 Beta 32.59 0.008
0.8 Beta 13.63 0.009
0.9 Beta 6.78 0.05


2800 Series
Series 2850

Flanged Wafer-Style Static Mixer - special purpose or retrofit replacement. A full body or "double flanged" variant that can be multistage if the application requires. Excellent mixing, completes within 10 pipe diameters.

Beta Plate K-Value CoV
0.7 Beta 32.59 0.008
0.8 Beta 13.63 0.009
0.9 Beta 6.78 0.05


2850 Series
Series 2900

Variable Flow Static Mixer - for extreme ranges of flow. For mixing when the process flow rate varies significantly. Excellent mixing, completes within 10 pipe diameters.

2900 Series
Series 3050

Low Headloss Mixer - specifically designed for installations where only very low pressure drop is permissable but mixing is important. Excellent mixing, completes within 10 pipe diameters.

Stages K-Value CoV
One 0.58 0.057
Two 1.13 0.026
Three 1.64 0.014


3050 Series
Series 4000

Open Channel Mixer - a low headloss mixer mounted in a penstock for removal for easy cleaning for open channels.

4000 Series
Series 5000 5000 Series Open Channel Mixer - low headloss mixer where the fins are bolted directly into the floor of an open channel. 5000 Series
Series 6000

6000 Series Counter Swirl Rapid Mixer bridges the gap between the 2850 Series and 3050 Series mixers with excellent mixing, low headloss and as an additional benefit, mixing in a very short distance - 3 pipe diameters.

K-Value CoV
1.26 0.025


Series 7000 7000 Series Static Mixer - a combination of the Series 2800 wafer-style and Series 3050 low headloss mixer designed for coagulant mixing 7000 Series

The photographs below are from a bench test where potassium permanganate is injected into a flow stream from right to left.

No Static Mixer Installed

Westfall Static Mixer Installed


Westfall Static Mixers have predictable headloss co-efficients.

A chart indicating the head loss coeffient of each model.


Westfall Manufacturing, along with H2O Rx, design and build static mixers to meet your needs:

Size Range: DN15 to DN2400

Materials Include:

  • PVC
  • FRP
  • 316 stainless steel
  • Titanium
  • Hastelloy®
  • Kynar®
  • Polypropylene
  • Carbon steel
  • If more protection is needed a Teflon® coating can be provided.


  • Water treatment
  • Chemical blending
  • Dissolving gases
  • Polymer blending
  • Flocculent blending
  • pH control
  • Potable water
  • Waste water
  • Chlorination
  • De-Chlorination
  • Food Processing
  • Pharmaceutical

Other Products

Other products in the Westfall Manufacturing range include:


H2O Rx
PO Box 748
Lane Cove NSW 1595


+61 409 784 236


Last Updated: 21 May, 2020