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Kynar PVDF Static Mixers
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Kynar PVDF Static Mixers

Price range: $375.00 through $1,125.00

Kynar PVDF Static Mixers are high-performance inline mixing devices made from Kynar® (Polyvinylidene Fluoride).
They combine excellent chemical resistance with superior mechanical strength for corrosive applications where standard plastics fall short.

What Are Kynar PVDF Static Mixers?

These static mixers feature a PVDF housing with fixed internal helical or corrugated mixing elements.
As fluids flow through the mixer, the elements repeatedly divide, rotate, and recombine the flow to create thorough, uniform mixing without any moving parts.

Kynar PVDF offers outstanding resistance to strong acids, halogens, oxidizers, and many solvents while providing better impact strength and pressure capability than PTFE or PFA.

Key Benefits

Superior Chemical Resistance Excellent performance with strong acids, oxidizers, and halogens.
High Mechanical Strength Stronger and more durable than softer fluoropolymers like PTFE or PFA.
No Moving Parts Maintenance-free and highly reliable operation.
Cost-Effective Offers better value than full PFA or Hastelloy for many corrosive services.

Kynar PVDF Static Mixers are the ideal choice for corrosive chemical dosing, water treatment, and industrial processes where stainless steel corrodes too quickly and full fluoropolymer construction is not required.

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Kynar PVDF Static Mixers are high-performance, chemically resistant inline mixing devices constructed from Kynar® (Polyvinylidene Fluoride – PVDF).
They are specifically engineered for highly corrosive and aggressive chemical environments where stainless steel would corrode and standard plastics like PVC or CPVC are not sufficiently resistant.

What Are Kynar PVDF Static Mixers?

These static mixers consist of a Kynar PVDF pipe or tube housing containing fixed internal mixing elements — typically helical (twisted ribbon) or corrugated/tabbed designs.
As the process fluid flows through the mixer, the elements repeatedly divide, rotate, and recombine the flow streams, creating thorough and uniform mixing without any moving parts.

Kynar PVDF is a semi-crystalline fluoropolymer known for its outstanding balance of chemical resistance, mechanical strength, and thermal stability.
It offers excellent resistance to strong acids (including hydrochloric, sulfuric, nitric, and hydrofluoric acid), halogens, strong oxidizers, and many organic solvents, while maintaining good impact strength and abrasion resistance compared to softer fluoropolymers like PTFE or PFA.

Key Benefits

Superior Chemical Resistance Excellent resistance to strong acids, halogens, oxidizers, and many solvents where stainless steel rapidly corrodes.
Higher Mechanical Strength Stronger and more impact-resistant than PTFE or PFA, allowing higher pressure ratings and better durability.
Good Abrasion Resistance Performs better than softer fluoropolymers when handling slurries or mildly abrasive fluids.
No Moving Parts Maintenance-free operation with very high reliability.
Wide Temperature Range Continuous service from -40°F to 300°F (-40°C to 149°C).
Cost-Effective Alternative Offers excellent performance at a lower cost than PFA or Hastelloy static mixers for many corrosive applications.

Common Applications

  • Water and wastewater treatment – ferric chloride, alum, sodium hypochlorite, and acid/caustic dosing
  • Chemical processing – strong acid dilution, halogenated compounds, and corrosive solvent blending
  • Oil & Gas – corrosion inhibitor and scale inhibitor injection in sour service environments
  • Mining & mineral processing – acid leaching, slurry reagent mixing, and pH control
  • Pulp & Paper – bleach mixing and corrosive chemical addition
  • Power generation – FGD slurry systems and cooling water chemical treatment
  • Any corrosive service where stainless steel would corrode but full PFA is not economically justified

Kynar PVDF Static Mixers provide an excellent balance of high chemical resistance, mechanical strength, and cost-effectiveness.
They are the preferred choice in many corrosive applications where stainless steel is insufficient and full fluoropolymer (PFA) construction is not required, offering long service life with minimal maintenance.

Weight N/A
Dimensions N/A
Size

3/8", 1/2", 3/4", 1", 1-1/2", 2"
Elements

6, 12
Element Type

Blade, Helical
Connection Ends

Threaded (MNPT), Flanged (RF150), Plain Ends
Injection Ports (Separate attachment)

0 (Default), 1/4", 1/2"
Flow Straightening Blade

No (Default), Yes
Material

KYNAR PVDF
Removable Elements

Included (Default)

Specifications

Kynar PVDF Static Mixers are high-performance inline mixing devices made from Kynar® (Polyvinylidene Fluoride).
They offer an excellent balance of chemical resistance, mechanical strength, and cost-effectiveness for corrosive applications where stainless steel is insufficient and full PFA is not required.

Detailed Specifications – Kynar PVDF Static Mixers

Parameter Specification Notes
Material of Construction Kynar® PVDF (Polyvinylidene Fluoride) High-purity grade available upon request
Available Sizes ½” to 12″ (DN15 to DN300) Larger sizes available on custom order
Mixing Elements Helical (twisted ribbon) or corrugated/tabbed elements Fixed elements – no moving parts
Connection Types Flanged (ANSI/DIN), Wafer Style, Socket Weld, Threaded (smaller sizes) Raised face or flat face flanges standard
Pressure Rating Up to 150 PSI (10 bar) at ambient temperature Pressure rating decreases at higher temperatures
Temperature Rating -40°F to 300°F (-40°C to 149°C) continuous service Higher short-term temperatures possible
Chemical Resistance Excellent resistance to strong acids (including HF), halogens, oxidizers, and many organic solvents Superior to PVC/CPVC and most metals in aggressive services
Pressure Drop Low to moderate (typically 1–6 psi at design flow) Depends on viscosity, flow rate, and element design
Viscosity Range 1 cP to 50,000+ cP Particularly effective with moderate to high viscosity fluids
Applications Ferric chloride, sodium hypochlorite, sulfuric acid, hydrofluoric acid dosing, corrosive slurry mixing, water treatment, chemical processing Ideal where stainless steel corrodes and full PFA is not economically justified
Standards Compliance ASTM, ASME, FDA-compliant grades available Material certification and traceability provided upon request

Kynar PVDF Static Mixers are custom-engineered based on your specific flow rate, viscosity, required mixing uniformity, and chemical compatibility needs.
The number and design of the internal mixing elements are optimized to deliver the best balance between mixing performance and acceptable pressure drop.

These mixers provide an excellent cost-performance balance for many aggressive chemical services where stainless steel is insufficient and full fluoropolymer (PFA) construction would be unnecessarily expensive.

Pressure Drop

Pressure Drop vs. Flow Rate

Kynar PVDF Static Mixer – 2″ Nominal Size
Fluid: Water (1 cP viscosity) at 68°F (20°C)

Typical Pressure Drop Curve

Flow Rate (GPM)  |  Pressure Drop (psi)
─────────────────────────────────────
5          |   0.8
10          |   2.1
15          |   3.8
20          |   6.2
25          |   9.1  ← Typical Design Point
30          |  12.5
40          |  18.0
50          |  25.5

The pressure drop increases approximately with the square of the flow rate (typical for static mixers).
Recommended operating range: 8 – 35 GPM for a 2″ Kynar PVDF Static Mixer

Key Notes on Pressure Drop

  • Low pressure drop design (fewer elements) — lower mixing intensity but energy efficient
  • Standard design (shown above) — balanced mixing performance
  • High mixing intensity design — more elements for difficult fluids, higher pressure drop
  • Pressure drop rises significantly with higher viscosity fluids
  • Actual pressure drop depends on exact mixer element geometry, fluid viscosity, density, and required mixing uniformity

For your specific process conditions (flow rate, viscosity, density, and required homogeneity), we recommend requesting a custom pressure drop calculation.
Kynar PVDF Static Mixers are typically designed to keep pressure drop in the 3 – 12 psi range for most water treatment and chemical dosing applications.

Installation

Proper installation of Kynar PVDF Static Mixers is essential for leak-free performance, optimal mixing efficiency, and long service life.
PVDF is a strong but relatively rigid fluoropolymer, so careful alignment and controlled torque are important to avoid stressing the material.

Installation Procedures for Kynar PVDF Static Mixers

Step Installation Procedure Tools / Materials Required Safety & Important Notes
1 Verify the flow direction arrow on the PVDF mixer body matches the actual process flow direction. PVDF static mixers are directional — reverse installation will significantly reduce mixing efficiency. None Always confirm flow direction before proceeding.
2 Shut down the system, isolate the line, depressurize, and follow lockout/tagout (LOTO) procedures. Drain or vent the line as needed for safe access. Lockout/Tagout kit Never install while the system is pressurized or contains hazardous chemicals.
3 Clean all flange or connection faces thoroughly. Use new, chemically compatible gaskets (typically PTFE or Viton) rated for the process fluid and temperature. Lint-free cloths, isopropyl alcohol, new gaskets Old or damaged gaskets are a common cause of leaks in PVDF systems.
4 Align the mixer carefully between the flanges. Hand-tighten bolts in a criss-cross pattern, then torque gradually and evenly to the manufacturer’s recommended low-torque values for PVDF. Calibrated torque wrench (low torque range) PVDF is strong but can crack if over-torqued. Follow manufacturer torque specifications exactly.
5 Install proper piping supports on both sides of the mixer to prevent stress or sagging on the PVDF body. Avoid excessive side loading or misalignment. Pipe supports or brackets Unsupported weight can cause long-term deformation or stress cracking in PVDF.
6 Perform a low-pressure leak test with water or inert gas before introducing the full process chemical. Gradually increase pressure while checking all connections. Pressure testing equipment Start at low pressure and monitor for any signs of stress on the PVDF housing.
7 Slowly introduce the process fluid at low flow rate. Monitor pressure drop across the mixer and check for any signs of leakage or unusual stress. Pressure gauges, flow meter Compare actual pressure drop with the manufacturer’s predicted value.
8 Document the installation, including torque values, gasket type, pressure test results, and baseline pressure drop in the equipment log. Include photos of the installed mixer. Installation checklist, camera Record serial number and installation date for future reference and maintenance planning.

Important Notes for Kynar PVDF Static Mixers:

• PVDF is strong but can crack if over-torqued. Always use low, even torque and follow the manufacturer’s recommended values.
• Use only chemically compatible gaskets (typically PTFE or Viton).
• Provide proper piping supports to prevent stress on the PVDF body.
• Start with low pressure and flow during initial startup to check for leaks and verify performance.

Correct installation protects the integrity of the PVDF material and ensures the mixer delivers the designed mixing performance with maximum reliability.

Maintenance

Kynar PVDF Static Mixers are highly reliable because they have no moving parts. However, regular inspection and gentle cleaning are necessary to prevent internal fouling, maintain mixing efficiency, and protect the PVDF material from long-term chemical attack or mechanical stress.

Maintenance Procedures for Kynar PVDF Static Mixers

Maintenance Task Procedure & Frequency
Daily / Visual Inspection • Check for external leaks at flanges or connections
• Monitor and record pressure drop across the mixer
• Visually inspect the PVDF body for any discoloration, cracking, or deformation
Weekly Cleaning • Flush the mixer with clean water or a compatible neutral solvent
• Wipe external surfaces to remove chemical residue
• Ensure all connections remain tight and secure
Monthly Deep Cleaning • Isolate the mixer and perform a thorough chemical cleaning cycle using validated agents compatible with PVDF
• Inspect internal mixing elements (if accessible) for scaling or buildup
• Check pressure drop trends to detect early signs of fouling
Quarterly / Semi-Annual Inspection • Thoroughly inspect the PVDF body for stress cracking, swelling, or chemical attack
• Check all flange bolts for proper torque
• Verify that the internal tube or element surfaces remain clean and smooth
Annual / Major Maintenance • Remove the mixer if design allows (flanged models)
• Perform mechanical or chemical cleaning of the internal elements
• Inspect for erosion, cracking, or deformation of the PVDF material
• Replace gaskets and seals during reassembly
• Pressure test the unit after reinstallation
After Chemical Change or Long Shutdown • Flush the mixer thoroughly with a compatible solvent before and after long shutdowns
• Inspect for any residue or chemical attack from stagnant fluid
• Re-verify pressure drop and mixing performance after restart

Important Notes for Kynar PVDF Static Mixers:

• PVDF is chemically resistant but can be sensitive to certain solvents (ketones, esters, strong amines) at elevated temperatures. Always verify compatibility before cleaning.
• Monitor pressure drop trends — a gradual increase is the best early indicator of internal fouling.
• Use only mild, non-abrasive cleaning methods. Avoid high-pressure water jetting or aggressive mechanical scraping that could damage the PVDF surface.
• For highly fouling services, schedule more frequent cleaning. In clean services, annual maintenance is usually sufficient.

Keeping accurate records of pressure drop, cleaning frequency, and observed conditions will help optimize maintenance intervals and extend the service life of your Kynar PVDF Static Mixer.

Q&A

Question Answer
What is a Kynar PVDF Static Mixer? A Kynar PVDF Static Mixer is an inline mixing device constructed entirely from Kynar® (Polyvinylidene Fluoride). It uses fixed internal helical or corrugated elements to thoroughly blend fluids without moving parts. It is designed for highly corrosive environments where stainless steel corrodes and standard plastics lack sufficient resistance.
Why choose Kynar PVDF over stainless steel or PVC static mixers? Kynar PVDF offers superior resistance to strong acids (including HF), halogens, oxidizers, and many solvents. It provides better mechanical strength and abrasion resistance than PTFE or PFA while being significantly more chemically resistant than PVC, CPVC, or stainless steel in aggressive services.
What are the main applications for Kynar PVDF Static Mixers? Ferric chloride dosing, sodium hypochlorite injection, hydrofluoric acid handling, sulfuric acid dilution, corrosive slurry mixing, water treatment chemical feed, pulp & paper bleach mixing, and mining acid leaching processes.
What temperature and pressure ratings do they typically have? Continuous service temperature from -40°F to 300°F (-40°C to 149°C). Pressure rating is typically up to 150 PSI (10 bar) at ambient temperature, with derating at higher temperatures.
How do Kynar PVDF Static Mixers compare to PFA Static Mixers? Kynar PVDF offers better mechanical strength, higher pressure capability, and better abrasion resistance than PFA. PFA provides slightly better universal chemical resistance and higher purity, but Kynar PVDF is usually more cost-effective and mechanically robust for many corrosive services.
Are they suitable for abrasive slurries? They perform better than softer fluoropolymers (PTFE/PFA) with mildly abrasive slurries due to PVDF’s higher mechanical strength and abrasion resistance. However, for very heavy abrasive service, specialized designs or other materials may be recommended.
What connection types are available? Flanged (ANSI/DIN), wafer style, socket weld, and threaded connections for smaller sizes. Raised-face or flat-face flanges are standard.
How much maintenance do Kynar PVDF Static Mixers require? Very little routine maintenance is needed because there are no moving parts. The main tasks are periodic flushing or cleaning to prevent fouling and regular visual inspection of connections and the PVDF body for any signs of stress or chemical attack.
Can they be used in sanitary or food-grade applications? Standard Kynar PVDF mixers are not typically 3-A or EHEDG certified. However, specially designed sanitary versions with polished surfaces and Tri-Clamp connections can be produced for food or beverage applications where high chemical resistance is needed.

Note: Kynar PVDF Static Mixers offer an excellent balance of chemical resistance, mechanical strength, and cost-effectiveness.
They are ideal for aggressive chemical dosing and corrosive services where stainless steel corrodes too quickly and full PFA construction is unnecessarily expensive.

Advantages / Disadvantages

Advantages Disadvantages
  • Excellent chemical resistance to strong acids (including hydrofluoric acid), halogens, oxidizers, and many solvents
  • Superior mechanical strength and impact resistance compared to PTFE or PFA
  • Good abrasion resistance, making it suitable for mildly abrasive slurries
  • Wide operating temperature range (-40°F to 300°F / -40°C to 149°C)
  • Lower cost than full PFA or Hastelloy static mixers while offering comparable corrosion resistance
  • No moving parts – virtually maintenance-free with proper operation
  • Low to moderate pressure drop with effective mixing performance
  • Lightweight compared to metal mixers, easing installation and support requirements
  • Not as universally chemically resistant as PFA (sensitive to certain ketones, esters, and strong amines at high temperatures)
  • Lower maximum pressure rating compared to stainless steel or Hastelloy (typically limited to ~150 PSI with temperature derating)
  • Can be susceptible to stress cracking if over-torqued or subjected to excessive mechanical stress
  • Requires careful torque control and proper piping supports during installation
  • Not suitable for extremely high-purity or ultra-sanitary applications without special design
  • Pressure drop can increase significantly with high-viscosity fluids or heavy fouling
  • More expensive than standard PVC or CPVC static mixers

Note: Kynar PVDF Static Mixers provide an outstanding balance of chemical resistance, mechanical durability, and cost-effectiveness.
They are the preferred choice in many corrosive applications where stainless steel fails quickly and full PFA construction is unnecessarily expensive.
Proper installation and compatible cleaning practices will maximize service life and performance.

Applications

Kynar PVDF Static Mixers are specifically engineered for aggressive and highly corrosive chemical environments where stainless steel corrodes rapidly and standard plastics like PVC or CPVC lack sufficient resistance.
Their excellent balance of chemical inertness and mechanical strength makes them ideal across multiple demanding industries.

Applications of Kynar PVDF Static Mixers

Industry / Application Typical Chemicals Injected / Mixed Purpose & Benefits
Water & Wastewater Treatment Ferric chloride, ferrous chloride, sodium hypochlorite, alum, sulfuric acid, caustic soda, hydrofluoric acid (in specialized processes) Provides reliable, uniform chemical dispersion for coagulation, disinfection, and pH adjustment while resisting rapid corrosion that destroys stainless steel mixers.
Chemical Processing Sulfuric acid dilution, hydrochloric acid blending, nitric acid mixing, halogenated compounds, strong oxidizers Ensures thorough mixing of highly corrosive reagents without degradation of the mixer body, extending service life significantly.
Oil & Gas Production Corrosion inhibitors, scale inhibitors, H₂S scavengers, demulsifiers in sour service Withstands aggressive sour gas and high-chloride environments where stainless steel fails quickly.
Mining & Mineral Processing Acid leaching (sulfuric & hydrochloric), cyanide detoxification, flotation reagents, pH control chemicals Handles abrasive slurries and strong acids common in heap leaching and mineral extraction processes.
Pulp & Paper Industry Chlorine dioxide, sodium hypochlorite, hydrogen peroxide, and bleaching chemicals Resists oxidative bleaching agents that quickly attack stainless steel and other plastics.
Power Generation Limestone slurry for FGD systems, cooling water biocides, pH adjustment chemicals Provides reliable mixing in flue gas desulfurization and cooling tower chemical treatment systems.
Specialty Chemical Manufacturing Fluorinated compounds, bromine-based chemicals, strong oxidizers, and solvent-based reactions Delivers consistent mixing performance in processes involving highly reactive or corrosive intermediates.

Kynar PVDF Static Mixers are particularly valuable when:

  • Stainless steel mixers corrode within months
  • Process fluids contain strong acids, halogens, or oxidizers
  • Mildly abrasive slurries are present
  • Long service life with minimal maintenance is required
  • Cost-effectiveness is important but full PFA construction is too expensive

By offering superior corrosion resistance combined with good mechanical strength, Kynar PVDF Static Mixers deliver reliable, long-term performance in some of the most challenging chemical dosing and mixing applications across industry.

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