Harris
Harris 425 Series Oxygen Regulator 0-125 psi 2.75
Single-stage oxygen regulator delivers up to 125 psi outlet pressure with a 2.75-inch gauge for industrial welding use
- MaterialHAWA
- TypeSingle Stage Cylinder
- Single-stage design gives direct pressure control
- 125 psig maximum outlet pressure suits oxygen cutting
- CGA 540 inlet fits standard oxygen cylinders
- Chrome-plated brass body resists corrosion
- Neoprene diaphragm maintains seal integrity
Harris 425 Series Oxygen Regulator
The Harris 425 Series is a single-stage cylinder regulator designed for industrial oxygen service. It delivers a maximum outlet pressure of 125 psig through a chrome-plated brass body with a neoprene diaphragm. The unit features a T-handle control and a 2.75-inch gauge for pressure monitoring. It is supplied new for professional welding and cutting applications.
CGA 540 Inlet and 9/16 UNF Outlet
Verify that your oxygen cylinder carries a CGA 540 male connection measuring 0.825-14 thread before ordering. The regulator inlet is male NGO type and mates directly to this standard. Downstream equipment must accept a male 9/16-18 UNF outlet connection. Confirm your hose or torch fittings match this specification to avoid leaks or the need for adapters.
Single-Stage Design for Steady Supply
This regulator replaces older single-stage models or upgrades from basic flow meters where consistent outlet pressure is required. The jump is worth it when your process demands a stable 125 psig maximum delivery without the complexity of a two-stage unit. It is not suited for applications needing ultra-precise pressure holding as cylinder pressure drops.
Highlights
- Single-stage design gives direct pressure control
- 125 psig maximum outlet pressure suits oxygen cutting
- CGA 540 inlet fits standard oxygen cylinders
- Chrome-plated brass body resists corrosion
- Neoprene diaphragm maintains seal integrity
Specifications
| Brand | Harris |
|---|---|
| Material | HAWA |
| Type | Single Stage Cylinder |
Questions about this item
Does the Harris 425 regulator come with a hose or torch, or must those be purchased separately?
The regulator body includes the T-handle control and CGA 540 inlet nut. Hoses, torch handles and cutting attachments are not included and must be bought separately.
Should I choose a different Harris model if I need outlet pressure above 125 psig?
Yes. This 425 Series unit is rated for a maximum outlet pressure of 125 psig. Applications requiring higher delivery pressure need a regulator with a higher outlet-pressure rating.
What does the 4,000 psig maximum gauge reading mean when the regulator is on a full oxygen cylinder?
The inlet gauge can display up to 4,000 psig, showing the full cylinder pressure. The outlet gauge reads 0–125 psig, which is the working pressure you set with the T-handle.
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