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Brass Victor gas regulator with CGA-540 inlet connection and dual pressure gauges

Victor

Victor 0781-3627 Gas Regulator CGA-540 Inlet

SKU CH-40N0-NPABB

Single-stage oxygen regulator with CGA-540 inlet, 5–125 psi delivery range and 4,000 psi maximum inlet pressure

  • MaterialHAWA
  • TypeGas Regulators
  • Single-stage design delivers consistent 5 to 125 psi outlet pressure
  • CGA-540 inlet connects directly to oxygen cylinders
  • Brass body with neoprene diaphragm meets ASTM G175 and CGA E-4 standards
  • 2-inch gauges show supply pressure up to 4,000 psi
  • 9/16-18 RH outlet fits standard welding hoses

Victor 0781-3627 Gas Regulator

The Victor 0781-3627 is a single-stage gas regulator built for oxygen service from high-pressure cylinders. It accepts a CGA-540 inlet connection and delivers adjustable pressure from 5 to 125 psi through a 9/16 in.-18 M RH outlet. The brass body and neoprene diaphragm meet ASTM G175, CGA E-4, ELT and UL252 standards for industrial welding applications.

Thermals noise and power draw

This mechanical regulator operates without electrical power so it produces no noise and draws no current during use. The brass body dissipates heat naturally while the neoprene diaphragm maintains consistent delivery pressure across the 5 to 125 psi range. A 2 in supply gauge reads up to 4,000 psi inlet pressure giving the operator a clear view of cylinder contents at all times.

Build quality and connectors

The 3.6 in diameter brass body resists corrosion and withstands maximum inlet pressure of 4,000 psi for long service life. The CGA-540 inlet threads directly onto oxygen cylinders while the 9/16 in.-18 M RH outlet fits standard welding hose fittings without adapters. The single-stage design simplifies maintenance and the gauge arrangement keeps both supply and delivery readings visible during daily workshop use.

Highlights

  • Single-stage design delivers consistent 5 to 125 psi outlet pressure
  • CGA-540 inlet connects directly to oxygen cylinders
  • Brass body with neoprene diaphragm meets ASTM G175 and CGA E-4 standards
  • 2-inch gauges show supply pressure up to 4,000 psi
  • 9/16-18 RH outlet fits standard welding hoses

Specifications

BrandVICTOR
MaterialHAWA
TypeGas Regulators

Questions about this item

How do I install the Victor 0781-3627 regulator with its CGA-540 inlet onto an oxygen cylinder, and what step is often missed?

Thread the CGA-540 nut onto the cylinder valve by hand, then tighten with a wrench; the step often missed is cracking the cylinder valve briefly before attaching the regulator to clear debris from the outlet.

What maintenance or replacement will the Victor 0781-3627 regulator need over time?

The neoprene diaphragm and internal seats wear with use; plan to rebuild or replace the regulator if delivery pressure drifts or the 2 in gauges show inconsistent readings.

What limit appears first on the Victor 0781-3627 during sustained high-flow oxygen use?

The single-stage design causes delivery pressure to rise as the cylinder pressure drops, so the 5 to 125 psi outlet range becomes harder to hold steady during long, heavy draws.

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