Model HFS

Flush Gas Station, For Use with HTP/HTX Thermocouple

The Delta Controls Model HFS Flush Gas Control Station maintains the pressure inside the thermocouple body above the operating reactor pressure. It also accurately controls the flush gas flow rate through the thermocouple sensor. This constant flush sweeps any penetrating gas molecules out of the thermocouple sensor before corrosion damage occurs and without artificially cooling the thermocouple element.

Features

  • Accurate low rate flush control insures maximum temperature sensing accuracy
  • Constant pressure extends thermocouple life
  • 5 micron filter traps particulates and prevents plugging of the thermocouple gas passages
  • Corrosion resistant, suitable for the severe environments found in sulfur recovery units
  • All stainless steel NACE compliant
  • Mounts on a vertical surface or 2" pipe stand

Specifications

  • Flow Range: 2-17 lph
  • Pressure Indicator: 2.5”Ø; 0-60 PSIG (0-4 bar)
  • All stainless steel internal and external parts
  • Flow Control: Constant mass flow rate type
  • Pressure Control Range: 2 to 50 PSIG (0.1 - 3.5 bar)
  • Filter: 5 micron sintered polypropylene
  • Drain: Manual valve
  • Materials:
    • Meter body: Stainless steel
    • Pressure Body: Stainless steel
    • Connection Fittings: All S.S., 1/8” FNPT pipe or millimeter size tubing
    • Faceplate and Pipe Clamps: Stainless steel
  • Supply Pressure: 25 to 250 PSIG (1.7 to 17 bar)
  • Supply Gas: Nitrogen

Applications

The HFS is designed to work with the Delta Controls Models HTP & HTX thermocouple. It maintains the pressure inside the thermocouple body at approximately 5.0 psig (0.34 bar) above the Claus reactor operating pressure. This prevents any possible contamination of the thermocouple junction by reaction gases entering the thermocouple. To avoid measurement errors, the HFS accurately controls the gas flow rate through the thermocouple preventing any error caused by flush gas cooling the thermocouple junctions.

Additional Information

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Flush Gas Station, For Use with HTP/HTX Thermocouple

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