Replace the damaged O ring

might be a good plan
The valve on a CO2 tank like a home brewer might use (2lb to 200lb) valve is an industry standardized CGA320.. that style valve has a flat face... and unless damaged will work with a regulator using a serviceable O ring design..
IOW, no, it is not it is dependant on the valve... all the valves are the same (unless you are using some third world county or mix match valve not specified for use on a CO2 tank in the US in which case, good luck getting it filled)