pimpmann22 wrote:Wow, I can't remember how many of times I've brung this point about in CO2 discussions. A major problem with exposing ball valves to a 'freezing liquid' is that it can possibly freeze your valves up. I don't think I have to go out on a stint as to why thats bad.
Just spend some money, and buy the damn real thing! No sense in chancing your safety on something you whipped up for 5$ with Gorilla glue, duct tape, and paper towels.
*wishes that all discussions of homemade CO2 regulators stopped*
I have built 3 cannons that are powered by Co2, the first was powered by a 12 gram, the second and third by a 9oz Co2 tank. Regular steel pipe and brass ball valves can handle the pressure just fine and the freezing temperatures of the liquid Co2 does not freeze the valves. Half the time I fill my expansion chamber with liquid Co2 for a bigger bang. I use about an ounce of Co2 per shot, sometimes more.
You can get high flow Co2 regulators about 125PSI for about $70-120 depending on if is is adjustabe or a fully adjustable regulator for a Tippmann 98 Custom for around $35.