Harris HP742 CGA 540 Oxygen Regulator
The Harris HP742 is a two-stage stainless steel regulator with a CGA 540 inlet for oxygen. Its 316L stainless steel body and diaphragm suit grade 6.0 gases and applications where either the internal gas or the external environment is harsh or corrosive. See all models in our Stainless Steel Regulators.
Gas service: CGA 540
CGA 540 is the oxygen cylinder connection. Keep any oxygen regulator dedicated to oxygen and completely free of oil and grease, inspect the threads before connecting, and open the cylinder valve slowly.
The Harris HP742 gives you a 316L stainless body for oxygen in harsh or corrosive surroundings. For laboratory oxygen without those conditions, also compare the HP702 CGA 540 and HP722C CGA 540.
Specifications
- Two-stage design, 316L stainless steel barstock body and fittings
- Bonnet: nickel-plated brass barstock
- 1-11/16″ 316L stainless steel diaphragm
- High purity PTFE seals and valve seats; seat protected by a 10 micron sintered stainless steel inlet filter
- Inboard helium leak rate 1×10-9 cc/sec
- 2″ dual-scale stainless steel gauges (psi/bar)
- Outlet pressure: selectable 0-15, 0-50, 0-125, 0-250 or 0-500 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 0.06; delivery changes only about 0.05 psig per 100 psig drop in cylinder pressure
- Purity: grade 6.0 (99.9999%) and higher, plus corrosive gases
- Pipe thread outlet port (FNPT) with outlet valve included: 1/4″ FNPT diaphragm valve
- Relief valve is not standard on the HP742 (Harris option 4); ask us if your system needs one
Typical applications
- Corrosive gases, or corrosive and harsh external environments
- Grade 6.0 research gas, process analyzers and gas chromatography
- EPA protocol, laser gas and emissions monitoring
What’s included
- Harris HP742 two-stage regulator with CGA 540 inlet
- 2″ dual-scale stainless steel gauges
- Outlet valve included: 1/4″ FNPT diaphragm valve
Other ranges and models
Choose your outlet pressure from the Outlet Pressure dropdown above: 0-15, 0-50, 0-125, 0-250 or 0-500 psig. The 0-125 psig range covers most laboratory delivery pressures. Need a different range? Contact us for a quote.
Compare the same CGA 540 connection in other Harris series:
- Harris GP402 (economy, up to grade 4.0), CGA 540
- Harris HP702 (high purity, up to grade 5.0), CGA 540
- Harris HP722C (ultra high purity, grade 5.0), CGA 540
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.
