Okay, few more revisions made, found a way to make that valve. although it isn't as compact as before.

will post revisions as soon as possible.

Thanks for the replies. but I think I've managed to design a useable valve that will meet my scheme.

wish me luck I'm off to scheme!

it is extremely crucial. the idea is that the valve will both trap the pressure contained downstream from the valve through the OUT port, and will lock the valve preventing flow after that pressure has been released.


step 1 allow air of desired pressure flow through IN port to OUT port.
step 2 ...

Yep, that little valve will allow me to charge semi-automatically

It should have 3 ports.
In
Out
Pilot.

Air should flow with little to no constriction from the IN port to the OUT port.

When pressure ~= to the Pressure of flow from the IN port is applied to the pilot the valve should close off the IN port stopping flow to the out port.

Pressure from the Pilot ...

in the last picture it would be in the place of the tee section labeled "on-off".

and it's not for any of those purposes really. its there so that with a continuos supply of air, of the desired firing pressure, the valve will close when the pressure in the chamber is, approximiatly, that of the ...

I'm looking for a valve that has 3 ports.
In, Out, and Pilot.

flow from in flows through out. when pressure is applied to pilot => ~In flow pressure, (preferably a few psi less than inflow required) the flow in will be choked. even if the pressure downstream is atm.

In order to allow flow to ...

made an updated hyup

So, there aren't any valves that would simplify the existing system?
Or better yet, make it more compressed >,< it seems like there are several sections that could use a machete XD

Okay, well if you need a better reason, I would say its a proof of concept.

The whole idea is to create a launcher that fires a larger than average projectile, and can do so multiple times without the hassle of turning the whole system on and off.

And as far as feasibility, it can be done. I've ...

can't load if you pressureize first. pressure in the charing chamber would prevent you from pulling the bolt back.

already using a three way as the master safety. the on/off serves as the intermediate and is automatically actuated. the pressure in the chamber causes it to close when supply pressure ...

Okay, the problem with that design is that I would have to manually turn the safety back on after charging before firing. Something I prefer would be automated. Like it is in the current design. (current design allows me to keep my hands on the grips until reloading, the safety is controlled via ...

you just described the current configuration...
piston Valve/toolies valve is in the bolt
qev is utilized with the tee leading to the pilot and bolt from the supply
and the directional control is the three way mounted outside

or am i misunderstanding...
if so, im sorry but could you maybe be a bit ...

So I'm trying to build a semi-automatic charging system that uses the supply air(reservoir or continuous supply) to actuate its more complicated workings.

The idea goes something like this:

Connect air supply

adjust supply pressure

pressure actuates safety valve

adjust firing pressure

open "on ...

Just a note, I didn't add them in, but there are hoses connecting the tank to the plumbing and the plumbing to the bolt....I was just too lazy to add them in on this version >,<

there are also 3 more hoses running out of the bottom to the safety pilot, the trigger pilot, and the supply gauge. (the ...