Planted Tank Guru
Join Date: Dec 2002
Location: Portland Orygun
The two other regulators you linked to are COMPRESSED AIR REGULATORS. They are designed for use on 125-150 PSI compressed air systems. And in this case you really should substitute "flow regulator" for regulator. They will not even fit on a CO2 cylinder. For good reason. Attaching one of these to a CO2 cylinder and opening the cylinder would result in small and large pieces of plastic and metal moving around the area at high speed. That 150 PSI max is the INPUT side also. Wishing otherwise doesn't make it so.
The other item you linked to might possibly work. Hard to say. But as you know it doesn't have a needle valve or solenoid.