That is what i basically did.. bout a "remote on/off" hard lined it into a brand new regulator... but when I turn the on/off knob to on the PSI jsut raises up to 50-60 psi and blows out the safety valve....
This should in theory work but it doesnt.. someone said i may have nitrogen in the tank instead of CO2 causing it to climb up... I hooked up a primary gauge and it read 1300 psi... but even with the low pressure knob all the way out it still climbs to 60 and pops.
Huh. Well, they would have charged you extra for nitrogen - it's more expensive, isn't it?
I did exactly what you did, except i used a crappy old regulator that came attached to a 20lb co2 tank i bought from a retired airbrush artist for $10 - with 9 pounds of co2 still in it!
The only guess i can make is that maybe something is wrong with your regulator - maybe you knocked some crud into the body of it that doesn't let the poppet close properly?
Either that or you accidentally hooked up the gas to the low pressure side, but that would be a smack-forehead why-did-i-not-notice-that thing.
So maybe it's time to take apart your regulator body and see if there is any crud in there messing things up.
The problem i have with my rig is that i am new to kegging. I put a keg of kolsch in the mini-fridge with the paintball tank and regulator that i thought i had properly burst carbed, that it turned out was still somewhat flat. So over the course of a week or so i made further attempts to burst carb from my 20lb tanks and usually would turn off the gas from the paintball tank when i wasn't serving.
And then i left the gas turned on for about four days and didn't drink any beer from that keg, and then found my paintball tank empty and my beer carbed, so i can't decide whether i just slowly carbed at 12psi for four days and used up all of my co2 in the little bottle, or if i have a co2 leak in the regulator.
I have the filling rig to refill the paintball tank myself from one of the 20lb tanks but haven't used it yet. Not enthused to invert one of my tanks yet.