Custom PVC Static Mixer

Custom Static Mixer

Koflo produces a complete line of industrial-grade schedule PVC static mixers in sizes ranging from 1/2"- 20". Size permitting, all custom PVC mixers are both hot air-welded and solvent-cemented into the housing to create a high strength bond and edge-seal the mixer to the wall to prevent liquid from "slipstreaming" around the mixing elements.

NSF 61 certification is available for most custom PVC static mixer configurations.

Contact us today to learn more about our custom PVC mixers. 


In-Stock Options

For many threaded applications, Koflo offers in-stock PVC static mixers. Click below to learn more.

Typical Applications

  • Polymer Blending
  • Water Treatment
  • Chemical blending
  • pH Control
  • Liquid/Gas Blending


  • Sizes: 1/2" - 24" consult factory regarding larger sizes
  • Pipe Schedules: Schedule 40, Schedule 80

Other Links

Available Options

Element Design

PVC Blade™ mixing elements

Koflo Blade™ Mixing Elements

The patented Koflo Blade™ style element provides Koflo's best-in-class efficient mixing ability for turbulent flow applications combined with minimal pressure (head) loss. Koflo's Blade™ elements are available in multiple configurations for demanding applications

  • Standard Design - Recommended for most applications. Koflo's standard configuration provides the best combination of mixing ability, pressure loss, and overall length.
  • Low Pressure Loss Design - For limited head pressure applications where lower pressure loss is a critical requirement. Lower pressure loss than standard design elements.
  • Ultra Low Pressure Loss Design - For critically limited head applications where lower pressure loss is paramount to the system design.
  • High-Mix Design - For space-constrained applications that demand Koflo's best-in-class mixing in a shorter overall length

Please note that Koflo does not sell elements without housings. Elements are shown for informational purposes only.

PVC helical mixing elements

Helical Mixing Elements

Koflo's helical-style static mixer elements are designed to provide optimal mixing for laminar / plug flow applications. Benefits of helical-style mixing elements include:

  • Optimal mixing for laminar or high-viscosity flows
  • Low pressure loss design
  • Ensure homogeneous mixing across large flow ranges

Please note that Koflo does not sell elements without housings. Elements are shown for informational purposes only.

PVC sludge (non-clog) mixing elements

Non-clog (Sludge) mixing elements

Koflo's patented non-clog (sludge) mixing elements are based on Koflo's standard Blade™ mixing elements and are designed to eliminate clogging or plugging.

Historically, a number of industries with fibrous slurry applications avoided the use of static mixers due to their tendency to plug or foul. In response to this problem, Koflo was the first static mixer manufacturer to fully develop and patent a revolutionary static mixer that is free of pinch points or intersecting elements. Non-clog (sludge) mixer elements are able to handle the most fibrous slurries without plugging. Each mixer contains a series of alternating right and left hand elements that blend the product stream with counter rotating vortices.

End Connections

PVC flanged static mixer with port

Flanged Ends

Flanged end connections provide easy assembly and disassembly in piping systems. For PVC static mixers with flanged end configurations, Koflo offers Van Stone Class 150 raised face flanged ends as standard. Van Stone flanges are socket style pipe flanges with a rotating flange ring to allow for easy, flexible alignment of bolt holes. 

All standard PVC flange dimensions conform to ASME B16.5 standards. PVC flange materials conform to ASTM D 1784.

Other flange standards or configurations (ie. DIN) available by request.

ASME B16.5 Class 150 Flange Dimensions. All sizes in inches.

Nominal Pipe Size Diameter of Bolt Circle Bolt Hole Diameter Bolt Diameter Number of Bolts
1/2 2-3/8 5/8 1/2 4
3/4 2-3/4 5/8 1/2 4
1 3-1/8 5/8 1/2 4
1-1/4 3-1/2 5/8 1/2 4
1-1/2 3-7/8 5/8 1/2 4
2 4-3/4 3/4 5/8 4
3 6 3/4 5/8 4
4 7-1/2 3/4 5/8 8
6 9-1/2 7/8 3/4 8
8 11-3/4 7/8 3/4 8
10 14-1/4 1 7/8 12
12 17 1 7/8 12
PVC static mixer with male NPT threaded ends

Threaded Ends

For threaded pipeline systems, Koflo offers threaded PVC mixers with male NPT threaded end connections as standard.


  • Dimensions: ASTM D 2467
  • Threads: ANSI B1.20.1 (NPT)

Alternate Configurations

  • PVC Female Threaded Ends Detail

    Female Threaded Ends

    Female threaded ends configurations are available by request.

PVC static mixer with plane ends

Plain Ends

Static mixers can be provided with plain end connections to allow for on-site configuration by the customer.

Other Options

PVC static mixer with female NPT chemical injection port

Chemical Injection Ports

Chemical injection ports allow the additive stream to be injected directly into the static mixer unit. PVC chemical injection ports are available in multiple configurations to suit your application.

Alternate Configurations

  • Female NPT Injection Port

    Female NPT Injection Port

    Koflo standard configuration

  • Flanged Injection Port

    Flanged Injection Port

    Flanged injection ports are available in multiple sizes.

Alternate Images

PVC Static Mixer with flanged injection port
PVC static mixer with removable stainless steel mixing elements

Removable Stainless Steel Mixing Elements

In some applications, it may be necessary to gain access to the interior mixer elements for cleaning or removal of pipeline obstructions. For these situations, Koflo offers removable 316/L stainless steel mixing elements. Unlike standard PVC elements which are hot-air welded and solvent cemented into the housing, Koflo's removable Blade™ style elements are fully removable and are secured to the mixer by means of an element retention disk on the discharge end of the mixer (shown above). Because removable elements aren't fixed to the pipe wall, stainless steel elements are offered which provide significantly greater structural rigidity to the element module and ensure efficient mixing for the duration of the mixer's life.

PVC static mixer with flow straightening vane

Flow Straightening Vane

Flow straightening vanes can be added to the downstream end of any PVC mixer to significantly reduce the flow rotation caused during the mixing process. Flow straightening vanes have a negligible impact on pressure loss. 

Static mixer with clear PVC housing

Clear PVC Housings

Clear PVC housings offer the unique opportunity for visual inspection of the mixing process. Additionally, for closed pipeline systems, clear PVC housing can act as a sight gauge to ensure proper flow levels and pipeline operation.

CPVC static mixer

CPVC Construction

With a significantly higher chlorine content than standard PVC, CPVC can withstand higher temperatures and is rated to 200°F as compared to 140°F for standard PVC. Nearly all available PVC custom static mixers options can be configured with CPVC construction. Chemical compatibilities can differ slightly between CPVC a PVC, so we recommend you consult the factory with any questions regarding your specific application.

Please Note: Koflo offers many additional mixer options that may not be listed above. Please Contact Us to discuss other options or requirements for your specific application.