Harris HP742 CGA 660 Corrosive Gas Regulator
The Harris HP742 is a two-stage stainless steel regulator with a CGA 660 inlet for corrosive gases and mixtures. 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 660
CGA 660 is used for corrosive gases such as chlorine, sulfur dioxide and nitric oxide, and for many corrosive gas mixtures. It seals with a washer, so use a new one at every cylinder change. Brass regulators are not suitable for these gases. Purge the regulator with an inert gas at every startup and shutdown, ideally through a cross-purge assembly, and vent purge gas to a safe exhaust. Corrosive and toxic gases are often housed in a gas cabinet.
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 660 inlet
- 2″ dual-scale stainless steel gauges
- Outlet valve included: 1/4″ FNPT diaphragm valve
- Use a new CGA 660 washer at each cylinder change
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.
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.
