Harris® HP 721C Specialty Gas Regulator - Oxygen 721C015540B
The Harris® HP 721C-015-540-B specialty gas regulator is a single stage, chrome-plated brass, high purity regulator with CGA 540 (oxygen) inlet and chrome diaphragm valve outlet. It features a 316L stainless steel diaphragm and a one piece encapsulated seat with sintered filter to prevent contamination. The HP 721C is recommended for gas purity levels of Grade 5.0 (99.999%) and higher. It is ideal for laboratory and research applications such as gas chromatography, EPA protocol, laser gas and emission monitoring.
Features
- CGA 540 Oxygen inlet
- Chrome diaphragm valve (installed) with 1/4 inch female NPT
- 1-11/16 inch 316L stainless steel diaphragm eliminates contamination from diffusion or outgassing
- One piece encapsulated seat design includes a sintered filter to protect the seat from particulate contamination
- 2 inch dual scale brass gauges (psi/bar)
- Designed to 1 x 10-9 cc/sec. inboard helium leak rate to maintain gas purity levels
- Maximum inlet 3000 PSIG
- External relief valve standard
- Available with delivery pressures up to 500 PSIG. (Please specify above)

