Model HFI


Flush Gas Station, For Use with HIR Pyrometer

The Delta Controls Model HFI Flush Gas Station provides a filtered purge gas across the process side of the Model HIR lens glass to reduce particulates from accumulating on lens. The HFI provides a single place at the reactor where the operator can regularly monitor and verify proper operation of the flush gas stream.

The HFI insures long-term temperature measurement reliability by flushing dust and ash from the pyrometer lens window. It is typically mounted on a vertical surface or two inch pipe stand. The HFI is suitable for the severe sulfur processing environments and is corrosion resistant.


  • Accurate, continuous purge flow rate
  • Insures long-term temperature measurement reliability
  • Corrosion resistant, suitable for Sulfur Unit environment
  • All stainless steel construction
  • Two mounting options
  • Simple, easy installation


  • Flow Range: 4 L/min to 38 L/min std
  • Pressure Indicator: 2.5 in diameter, 0 psig to 60 psig (0 bar to 4.1 bar)
  • Flow Control: Constant mass flow rate type
  • Pressure Control Range: 2 psig to 50 psig (0.1 bar to 3.4 bar)
  • Filter:5 μm sintered polypropylene
  • Drain:Manual valve
  • Meter body: Stainless steel
  • Pressure Body: Stainless steel
  • Connection Fittings: Stainless steel, 0.125 in FPT pipe or millimeter size tubing
  • Faceplate and Pipe Clamps: Stainless steel
  • Supply Pressure: 25 psig to 250 psig (1.7 bar to 17.2 bar)
  • Supply Gas: Clean dry air or nitrogen

Required Ordering Information

  • Detailed model number
  • Tag or nameplate detail (if required)
  • Documentation & testing packages (if required, refer to Additional Resources in the product catalog)

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Additional Information


Flush Gas Station, For Use with HIR Pyrometer

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