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Brass flashback arrestor set for torch oxy/fuel use

Miller-Smith Equipment

Miller-Smith Equipment H743 Flashback Arrestor Set Torch Oxy/Fuel

SKU CH-VNFV-GEZHP

Flashback arrestor set mounts on the torch for oxygen and fuel gases with 9/16-18 UNF fittings, CGA 022 and 023 inlets, brass body, 175 scfh fuel and 1,700 scfh oxygen flow, UL listed

  • Product typeWelding Parts & Supplies
  • Torch-mounted arrestors stop reverse flow at the handle
  • UL-listed design meets recognised safety requirements
  • Brass body resists corrosion in oxy/fuel service
  • 175 scfh fuel and 1,700 scfh oxygen capacity suit heavy cutting
  • 9/16-18 UNF CGA 022/023 fittings match standard B-size hoses

Torch-Mounted Flashback Arrestor Set

The Miller-Smith Equipment H743 set mounts directly on the torch for oxy/fuel welding and cutting. It stops reverse gas flow and flame propagation at the point of use. UL Listed construction meets recognised safety standards for professional and industrial workshops.

Brass Body With UNF Connections

Brass bodies and 9/16 in.-18 UNF threads handle fuel at up to 175 scfh and oxygen at up to 700 scfh. The CGA 023 fuel and CGA 022 oxygen inlets match standard B-size hose fittings. No external power or moving parts means silent, maintenance-free operation.

Direct Torch Mounting With B-Size Fittings

Torch-end mounting keeps the arrestors close to the flame for faster response. Identical 9/16 in.-18 UNF inlet and outlet threads simplify hose routing. Brass construction resists corrosion from common fuel gases and oxygen in daily shop environments.

How it compares

Measured against everything we stock in Welding Equipment & Positioners, at today’s prices. Recalculated every night.

Price $94.99
Pricier than about 63% of the 1,978 comparable items (median $50.99).

Specifications

Product
Brand nameSMITH EQUIPMENT
Product typeWelding Parts & Supplies

Questions about this item

How do I install the H743 flashback arrestor set on the torch, and what step is often missed?

Thread the 9/16 in.-18 UNF inlets onto the torch outlets — fuel side to CGA 023, oxygen side to CGA 022 — then tighten the B-size hose fittings; the step often missed is matching each gas to its specific CGA number.

What maintenance or replacement will the H743 set need later?

Inspect the brass body and internal check valves before each use; replace the complete set if flow drops below 175 scfh fuel or 1,700 scfh oxygen, or if any leak or flashback event occurs.

What limit appears first during sustained high-flow cutting with the H743 set?

The fuel-side maximum flow of 175 scfh is reached well before the oxygen-side 1,700 scfh limit, so fuel capacity becomes the governing restriction.

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