Review on SPARC Regulator 0 60CFH UNF 18RH WARRANTY by Eddie Breezy

I checked the flow rate with my cheap shooter meter - the regulator meter reads about twice as much as a stand alone flow meter. I figured the cheap gauge might be the problem, so I did a water displacement test - I opened the needle valve until the gauge read 10L/min and stuck the open end of its tubing under a water-filled graduated cylinder (fancy measuring cup). for exactly 10 seconds (I used a stopwatch). I collected 740 ml in 10 seconds, that's 4.4 l/min. Again, this is assumed to be 10. Flow meters are labeled "calibrated at 50 psi" but at any flow rate they operate at atmospheric pressure. The gas flow goes: tank -> first stage regulator -> needle valve -> flow meter -> superpipe -> bottom outlet. Because of the way the gas flows, the welder must provide exactly 50 psi of back pressure in the gas line to meet calibration specifications. Unfortunately the regulator only outputs 28psi at zero flow so this could never happen no matter what the welder is doing or what needle valve is set up. You simply used the wrong measuring tubes for the application. Flow meter - CGA 022 (oxygen B) with adapter to CGA 032 (inert gas B) for welders. It's fine, but you might want to glue on an adapter to keep it from rattling and rolling when you don't have a hose connected. If you want to repeat the installation, the first stage regulator connections are all 1/4 NPT, M10x1.0 flowmeter inlets, CGA 022 outlets like I said.