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Harris KH1131 brass gas regulator with dual gauges and CGA-580 inlet

Harris

Harris KH1131 Specialty Gas Regulator Cylinder Ar He N CGA-580 Welding

SKU CH-2XFH-TJP4Y

Single-stage brass regulator for argon, helium and nitrogen cylinders with CGA-580 inlet, 0–125 psi delivery range and 316L stainless-steel diaphragm

  • Main materialHAWA
  • Product typeGas Regulators
  • Single-stage design simplifies gas delivery for argon, helium and nitrogen
  • Brass body with 316L stainless-steel diaphragm handles up to 3,000 psi inlet pressure
  • CGA-580 inlet connects directly to standard cylinders
  • 0–125 psi delivery range covers common welding and lab applications
  • Includes diaphragm valve and 1/4 in Swagelok fitting for immediate hookup

Single-Stage Argon Helium Nitrogen Regulator

The Harris KH1131 is a single-stage brass regulator built for cylinder supply of argon, helium or nitrogen. It connects to a CGA-580 inlet and delivers pressure from 0 to 125 psi through a 1/4 in FNPT diaphragm valve with a 1/4 in tube fitting. The 2.0 in gauges show delivery and a 4,000 psi supply pressure reading. A 316L stainless steel diaphragm resists corrosion in high-purity gas service.

Upgrade From Two-Stage Or Non-CGA Models

This unit replaces older two-stage regulators when a compact single-stage design is preferred for steady cylinder pressure. It also upgrades setups that lack a CGA-580 inlet or a built-in diaphragm valve with Swagelok fitting. The jump is worth it when the application demands CGA E-4 compliance and a brass body rated for 3,000 psi maximum inlet pressure in a 2.0 in body diameter.

Stable Delivery Under Continuous Flow

Under sustained load the single-stage mechanism maintains consistent outlet pressure as cylinder pressure declines, while the 316L diaphragm resists creep and contamination. The 2 in supply gauge provides clear visibility of remaining cylinder pressure during long welds or purge cycles. Brass construction and the integrated diaphragm valve ensure reliable shut-off and flow control without external leakage over extended operating periods.

How it compares

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Price $448.99
Pricier than about 90% of the 1,978 comparable items (median $50.99).

Specifications

Product
Brand nameHARRIS
Product typeGas Regulators
Size & build
Main materialHAWA

Questions about this item

What inlet connection does the KH1131 regulator use for the gas cylinder?

The regulator connects to the cylinder through a CGA-580 inlet, which is the standard fitting for argon, helium and nitrogen cylinders in this service range.

What is the correct sequence for pressurising the regulator after the CGA-580 nut is tightened?

Turn the delivery pressure adjusting knob fully counter-clockwise before slowly opening the cylinder valve; the step most often missed is backing the knob out first, otherwise the diaphragm can be damaged by the sudden 3,000 psi inlet pressure.

When should the 316L stainless-steel diaphragm and the 2 in gauges be inspected or replaced?

Inspect the diaphragm and both 2 in gauges annually or after any over-pressure event; replace them if the delivery gauge drifts from the 0 to 125 psi range or if the supply gauge no longer reads up to 4,000 psi accurately.

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