Harris GP402 CGA 350 Hydrogen Regulator
The Harris GP402 is an economy two-stage regulator with a CGA 350 inlet for hydrogen, methane and other flammable gases. It is Harris’s general purpose brass regulator, sold here in our Economy Application Regulators, and it is an economical way to get steady two-stage delivery for low purity gases.
Gas service: CGA 350
CGA 350 is the cylinder connection for hydrogen, methane, carbon monoxide, ethylene and other flammable gases. It is a left-hand thread, often marked by a notched nut. For flammable service, add a flashback arrestor and check valve, vent the relief and purge outlets to a safe location, and leak-test with soap solution, never with a flame.
The Harris GP402 is the economy choice for industrial-grade hydrogen and fuel gases.
Specifications
- Two-stage design, brass body with painted die-cast bonnet
- Neoprene diaphragm, which Harris notes gives greater sensitivity
- PTFE seat, protected by a 10 micron nickel-plated sintered bronze inlet filter
- Tamper-proof, self-reseating internal relief valve
- 2″ dual-scale gauges (psi/kPa)
- Outlet pressure: selectable 0-15, 0-50, 0-125 or 0-250 psig (choose above); the 0-125 psig range has a 30″Hg vacuum to 200 psi outlet gauge
- Maximum inlet pressure 3000 psig
- Flow coefficient Cv 0.15; delivery pressure changes only about 0.04 psig for every 100 psig drop in cylinder pressure
- Purity: up to grade 4.0 (99.99%), for low purity applications
- 1/4″ MNPT pipe thread outlet
- Conforms to CGA E-4
Typical applications
- Purging and pressure testing
- Shielding and other industrial-grade, non-corrosive gas supply
- Low to medium pressure lab uses where neoprene is acceptable
What’s included
- Harris GP402 two-stage regulator with CGA 350 inlet
- 2″ dual-scale inlet and delivery gauges
- 1/4″ MNPT outlet
Other ranges and models
Choose your outlet pressure from the Outlet Pressure dropdown above: 0-15, 0-50, 0-125 or 0-250 psig. The 0-125 psig range covers most laboratory delivery pressures. Need a different range? Contact us for a quote.
Compare the same CGA 350 connection in other Harris series:
- Harris HP702 (high purity, up to grade 5.0), CGA 350
- Harris HP722C (ultra high purity, grade 5.0), CGA 350
- Harris HP742 (316L stainless, grade 6.0 and corrosives), CGA 350
Not sure this is the right regulator? Read our Regulator Buying Guide, check the CGA Charts, or call 1-888-641-2267 and our team will match the regulator to your application.
