co2 on RT valve good?

[jdaniels]

okay

good explanation.

[yaddatrance]

I would disagree with that reasoning, the expansion into
gas would drop the temperature below ambient and using
the temperature charts, you'd see that as long as the
valve has less that 50% liquid CO2, you should only see
<=850 psi, which in an RT valve which doesn't have a
low pressure section like the classic design shouldn't
cause a problem. Rapid fire would just make it shoot
down even less.

In effect, as long as you chrono in with the gun
at ambient temperature, you won't overshoot. You'll
just suffer shootdown and problems with freezing the
valve and O-rings when you rapid fire.

[Butterfingers]

Wrong the RT valve does have a low pressure section... The dump chamber pressure at rest is 450 psi...

The RT is a full air charge regulator. Basicly it works backwards.

Input pressure blasts into the chamber from the 850 psi input source then simultaneously shuts off when the spring pack gets pushed back and the resulting pressure that is "locked" into the dump chamber at around 450.

Now if you get liquid c02 in there it will fill with the input pressure until it hits 450 then the chamber will "lock". Now the liquid co2 warms up to ambient and pressure rises you have 850 psi in the dump chamber... This equals unsafe shots.

So no... my logic isnt flawed...

And operating an RT off c02 is unsafe... dont do it.

[yaddatrance]

Ah, I just went through it, you are right...
You'd have problems with the next shot hot
after you stopped shooting.

Good call, I've just never heard that explanation before.