so take a look at this and tell me what kind of valve you think it is?
http://combattrainingsolutions.com/file ... 0PB_PP.pdf
also what are they using for an air chamber? is that a fire extinguisher? if so how did they adapt it. they say it is used at up to 400 psi.

sorry about my grammer and the way my post looks, i curently have broken fingers on both hands so typing is a chalenge. im trying to build somthing that looks as profesional as posible, those tanks i found that i put a link to up top can be purchased unthreaded, so im just going to buy them there ...

it will be between 100 and 200 psi, 120-130 to be exact, but a want some room for error.

i have thought of that, hard if not almost imposible to convert to npt threads without welding (that i know of) i know there is a few mods out there for fire erxtinguishers but i can not find anything with a big enough neck. my other idea was this http://www.catalinacylinders.com/ in a low preshure ...

Im trying to find an air chamber with these requirements:

must be metal (aluminum?) rated for preshure
needs to have atleast a 1" outlet
prefer a npt thread or something that can easily be converted to npt thread.
i would like it to have 50-100 Cubic IN volume.

any and all ideas are appreciated.