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Brass two-stage gas regulator with pressure gauges and control knob

Harris

Harris KH1098 Two Stage High Purity Gas Regulator

SKU CH-8HKJ-VQNBF

Two-stage high-purity gas regulator for argon, helium and nitrogen with a 3,000 psig maximum inlet and 50 psig outlet

  • TypeWelding Supplies
  • Two-stage design delivers stable outlet pressure as cylinder pressure drops
  • Compatible with argon, helium and nitrogen for versatile shielding gas use
  • 3 000 psig maximum inlet handles high-pressure cylinders
  • 50 psig maximum outlet suits precision welding and purging tasks
  • 1/4 in female tube-fitting outlet connects directly to hose or manifold

Two-Stage High Purity Regulator

The Harris KH1098 is a two-stage high purity gas regulator designed for cylinder-mounted use with argon, helium or nitrogen. It delivers a maximum outlet pressure of 50 psig from an inlet rated at 3,000 psig. The unit is intended for welding and specialty gas applications that require stable, contamination-free flow control.

Upgrade From Single-Stage Units

This regulator replaces single-stage models when outlet pressure must remain constant as cylinder pressure drops. The two-stage design reduces the need for frequent readjustment during long welding runs or precision gas shielding tasks. It is not suited for gases outside the listed argon, helium and nitrogen compatibility or for systems requiring outlet pressures above 50 psig.

Cylinder Mount Installation

The regulator mounts directly to a cylinder using a male 0.965 in.-14 NGO right-hand inlet thread and provides a female 1/4 in tube-fitting outlet with right-hand threads. Installation requires matching the inlet connection to the cylinder valve and securing the outlet fitting to the downstream hose or manifold. Common issues include cross-threading the inlet nut, using incompatible thread sealants on the tube fitting, and exceeding the 3,000 psig inlet rating.

Highlights

  • Two-stage design delivers stable outlet pressure as cylinder pressure drops
  • Compatible with argon, helium and nitrogen for versatile shielding gas use
  • 3 000 psig maximum inlet handles high-pressure cylinders
  • 50 psig maximum outlet suits precision welding and purging tasks
  • 1/4 in female tube-fitting outlet connects directly to hose or manifold

Specifications

BrandHARRIS
TypeWelding Supplies

Questions about this item

What cylinder thread does the 0.965 in.-14 NGO inlet on this KH1098 regulator require?

The regulator mounts directly to a cylinder with a right-hand 0.965 in.-14 NGO male thread; no adapter is needed if the tank outlet matches that specification.

Which step is most often missed when installing this two-stage regulator on an argon, helium or nitrogen cylinder?

After threading the 0.965 in.-14 NGO inlet onto the cylinder valve, the outlet pressure must be set with the control knob while the downstream valve is closed; opening the cylinder before adjusting the knob can over-pressurise the 1/4 in. tube fitting outlet.

How often should the internal seat and filter of this high-purity regulator be inspected or replaced?

Inspect the seat and inlet filter at least once a year or whenever outlet pressure drifts above the 50 psig maximum; replace them if contamination or wear is found to maintain gas purity for argon, helium or nitrogen service.

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