CO2 w/ AGD guns

[cky shane]

I don't know. My bet is that the CO2 would liquify in the regulator unless it was kept quite warm, which basically delays the inevitable.

[xen_100]

goat boy has it exactly right! co2 in gaseous form will work just fine. the trouble is gaurenteeing 100% that is will stayt in gaseous form all the time and never put liquid into your valve. this wont happen no matter what precautions you take.

As that phase chart shows, once you start to hammer on the trigger, the input pressure will go down(from the temp lowering). a varing input pressure is not something you want on an RT valve, where input pressure controls the RT effect. it would be all over the place.

so can it work???? sure, will it work well, no! could you mess up your valve from liquid co2 freezing o-rings.........oh-ya!

it is just easier for AGD to say, it only works with HPA than say it is "prefered". (that leaves the door open for people to try co2 and then b!tch about it not working)

[billmi]

Originally posted by GoatBoy

OK. Assuming you could keep liquid CO2 from feeding into an RT valve, why would it not work?

CO2 expands at different rates than HPA. The regulator in the RT valve is designed to snap shut when its set pressure is reached, unlike the AIR valve which slowly closes as it gets closer to the set pressure. In order to do that, the RT valve had to be designed around the expansion charactaristics of HPA, and it will not deliver proper pressures when fed CO2. At least that's what Tom Kaye said in 1996 at the press conference where he unveiled the Automag RT (if memory serves I was sitting in the third row, on the right.)

See you on the field,
-Bill Mills

[GoatBoy]

Originally posted by billmi


CO2 expands at different rates than HPA. The regulator in the RT valve is designed to snap shut when its set pressure is reached, unlike the AIR valve which slowly closes as it gets closer to the set pressure. In order to do that, the RT valve had to be designed around the expansion charactaristics of HPA, and it will not deliver proper pressures when fed CO2. At least that's what Tom Kaye said in 1996 at the press conference where he unveiled the Automag RT (if memory serves I was sitting in the third row, on the right.)

See you on the field,
-Bill Mills

Well, I've continued looking into this, and this does correlate with my findings so far. I'm still trying to find details on gas characteristics when I have the time, BUT... There is my other question still lurking from an earlier thread, which is basically... how much CO2 is too much? Obviously, trace amounts exist in normal HPA, but...

http://www.automags.org/forums/showthread.php?threadid=90247