Harris
Harris 425 Series Gas Regulator 0 to 50 psi, 2.75", Oxygen
Single-stage oxygen regulator delivers 0 to 50 psi outlet pressure with a 2.75-inch gauge and CGA 540 inlet
- MaterialHAWA
- TypeSingle Stage Cylinder
- Precise oxygen flow with 0 to 50 psig outlet range
- Single-stage cylinder design for straightforward pressure control
- Chrome-plated brass body resists corrosion in industrial use
- CGA 540 inlet fits standard oxygen cylinders securely
- Neoprene diaphragm ensures reliable sealing during operation
Harris 425 Series Oxygen Regulator
The Harris 425 Series regulator is built for industrial oxygen supply from a single-stage cylinder. It delivers a controlled outlet pressure up to 50 psig for cutting, welding or brazing tasks. The CGA 540 inlet threads onto standard oxygen cylinders with a 0.825-14 NGO male connection. This unit suits professional fabricators who need reliable pressure reduction.
Brass chrome-plated body with neoprene diaphragm
The body uses HAWA brass with a chrome-plated finish for corrosion resistance in workshop environments. A neoprene diaphragm provides consistent sealing through repeated pressure cycles. The outlet uses a 9/16-18 UNF male fitting for hose attachment. A T-handle allows straightforward adjustment without tools during daily operation.
Single-stage design for 0 to 50 psig outlet
This regulator reduces cylinder pressure directly to the working range without a second stage. It is intended for applications where a constant inlet pressure is maintained and slight outlet variation is acceptable. Buyers who require precise pressure stability across a depleting cylinder should consider a two-stage alternative. The maximum inlet gauge reads 4,000 psig.
Highlights
- Precise oxygen flow with 0 to 50 psig outlet range
- Single-stage cylinder design for straightforward pressure control
- Chrome-plated brass body resists corrosion in industrial use
- CGA 540 inlet fits standard oxygen cylinders securely
- Neoprene diaphragm ensures reliable sealing during operation
Specifications
| Brand | Harris |
|---|---|
| Material | HAWA |
| Type | Single Stage Cylinder |
Questions about this item
How does the CGA 540 inlet connection limit the regulator's practical outlet pressure?
The CGA 540 inlet is rated for oxygen service up to 4,000 psig cylinder pressure, while the single-stage design delivers a maximum outlet pressure of 50 psig.
What are the exact thread specifications needed to mount this regulator to an oxygen cylinder and downstream hose?
The inlet uses a male 0.825 in.-14 NGO thread for the cylinder valve, and the outlet requires a male 9/16 in.-18 UNF fitting for the hose connection.
What is the correct sequence for installing this single-stage oxygen regulator, and which step is most often missed?
Secure the regulator to the cylinder valve using the CGA 540 nut, then slowly open the cylinder valve before adjusting the T-handle; the step often missed is cracking the cylinder valve first to clear debris.
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