Hey I am building a hybrid that pressurizes MAPP and O2 but I saw yours and was wondering how you connected the hose to the can. right now it looks like my only options are:
1. Pay for 2 torch heads and cut them off
2. Buy connectors that do not have valves (meaning I can't dial them down or up ...

Sheetmetal+rubber gasket

edit: And if you don't want to take it apart, then don't build a hybrid.

How thick of sheet metal?
I've built combustion and pneumatic so this is the next step

To get this to work I think you would have to use a valve that triggers at a pretty low temperature, perhaps ...

I realize this is kind of an old post but could you explain how you integrated the piston. Right now I was looking into a Heat-activated emergency release valve but that requires a power source. Burst discs are good but I do not want to disassemble my gun everytime I shoot it.

Hmm then what's a good recommendation for burst discs to hold up to around 125ish psi?

I just dont want to have to take it apart every time I want to fire it.

Yea the weight I think was around 20lb?? I was going to get one matched to the chamber size (2") because I figured that it would still have a wider bore than my barrel. The other thing I was looking into was a guy who used a piston in his but I haven't got around to asking him how to do it.
It's ...

Edit:

12 ATM is roughly 176ish PSI so this whole thing is definitely steel pipe BTW.

Yea, the valve has a node that triggers instantaneous release. It has a switch that is actuated electrically kinda like a circuit breaker. So the moment the air temp is over say 150F then it opens. Like I said I am looking into it. My other option is to try and incorporate a piston design I saw ...

Ok so I have been working on designing a Hybrid all summer and burst discs just aren't something I want to trust too much. Today I found the golden egg. http://clarkcooper.com/
I am trying to get a pricing on a HEAT ACTUATED - MANUAL CLOSE valve.
Basically at a given temp the valve auto opens and ...