PVDF & PFA Ultra-Pure In-Line Fluid Heaters

PVDF & PFA Ultra-Pure In-Line Fluid Heaters


For semiconductor, solar, MEMS manufacturing, and other industries requiring the most exacting standards of purity, Heateflex offers a line of PVDF & PFA ultra-pure in-line fluid heaters. These heaters are ideal for heating deionized water, acids, and less aggressive process chemistries (depending on the model). Moreover, the heater is appropriate for recirculation and point-of-use fluid heating applications. Furthermore, the small footprint results in lower space requirements, and it is easy to integrate these heaters into current systems. Available in 1-30 kW, and in worldwide voltages.


At the heart of our PVDF & PFA in-line fluid heaters is the patented Heateflex® heating coil, which provides the maximum power output in the smallest possible package. In addition, a low watt density design (≤ 4 watts/in.²) extends the life of the heater (which is typically greater than 10 years) by spreading out the wattage. Futhermore, PFA materials extrude over the heating element, eliminating the need for a nitrogen purge, and reducing operating costs.


These Heateflex PVDF & PFA in-line heaters incorporate a number of features for safe operation. For example, over-temperature and process high-limit interlocks maintain safe heater temperatures. Additionally, a liquid level sensor provides the operator with the assurance that the heating element remains immersed in the process fluid. Finally, a ground wire ensures electrical safety per the appropriate standards.


Heateflex uses only high-grade fluoropolymer materials (PVDF or PFA) for all of the wetted surfaces of these in-line fluid heaters. Numerous models of these heaters, depending on the application, are available. Temperature outputs range from 95º to 160º C, with an operating pressure of 60 PSIG at 95º C. Flow rates range from 0.5 GPM (1.9 LPM) to 32 GPM (122 LPM), depending on the model. Lastly, fluid temperature is ambient to 95º C (203º F), with a temperature accuracy of ± 0.1º C.

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  • Ultra-pure design
    • PVDF/PFA wetted surfaces
  • Fast response
    • Low watt density: ≤ 4 watts/in²
  • Compact design
    • Maximum power in smallest footprint
    • Heaters are typically 10″ to 30″ tall, and range from 4″ to 6″ in diameter
  • Flexible solutions
    • Multiple designs with numerous options, voltages, and power outputs available


  • Heating element: patented Heateflex® coil
  • Wetted surface: PVDF/PFA
  • Sizes: 1 kW to 30 kW (dependent on customer voltage)
  • Voltages: 200 VAC to 480 VAC, 1-ph and 3-ph (dependent on wattage)
  • Temperature: ambient to 95º C (203º F)
  • Temperature accuracy: ± 0.1º C
  • Flow: 0.5 GPM (1.9 LPM) to 32 GPM (122 LPM) (dependent on model)
  • Pressure: 60 PSIG @ 95º C
  • MTBF: 10.29 years

Safety features

  • Liquid level sensor
  • Ground
  • Over-temperature thermocouple
  • Process thermocouple



Model Material and Housing Max Temp* kW Benefits
LH1 PVDF Pipe Style 95°C 1-15kW Variable Height
LH7 PVDF Pipe Style 95°C 1-30kW Higher Flow and kW
Model Material and Housing Max Temp* kW Benefits
LHX PTFE Molded Housing Style 100°C 1-7kW Low Cost for Low Temp Applications
LHY PTFE Molded Housing Style 100°C 10-12kW Low Cost for Low Temp Applications
LHM PFA Chemlock® Style 120°C 1-6kW Compact Size: 20″
LHN PFA Chemlock® Style 120°C 7-12kW Compact Size: 30″
LHR PFA Pipe Style 120°C 1-2kW Smallest Footprint for Low Flow Applications
LHK PFA Canister Style 160°C 1-10kW Compatible for Higher Temp. Applications; Small Height: 16″
HC PFA Pipe Style 180°C 1-10kW Highest Temp. Series and Zero O-Rings; No Threads in Wetted Surface
LHT PFA Pipe Style 180°C 1-18kW Compatible with High Temp. Applications; Zero O-Rings; No Threads in Wetted Surface
*Contingent on Properties of Process Fluid


Microprocessor-based temperature controller in NEMA-rated external switching chassis


  • Thermal cutoff
  • Type-K or other thermocouples available
  • Fiber-optic liquid level sensor
  • RTD sensors
  • Flow switch
  • Pressure relief valve
  • Heater in enclosure
  • Heaters retrofitted for customers’ current designs

Contact Heateflex at (626) 599-8566 to learn more about other options.