Need some help with my first "bottle build"

[SteveV]

I'm using a JDS Airman drop bottle adapter, with a 13 c.i. 4500 psi bottle, with a paintball type reg, looks to be a Gurlleu brand, with a 1500 psi output. I've got the bottle filled with 3000 psi, but it's not putting anything out, as in no pressure to the tube -

I know the JDS Airman drop block doesn't have one of the pins that would work with a strictly co2 tank, but I was under the impression it was good to go and set up for hpa -

Any idea(s) what I might be doing wrong?

Thanks in advance for any suggestion 

SteveV

 

[nervoustrig]

Like the pin valve on a CO2 tank, most if not all regulators on HPA tanks have a check valve that behaves the same way.



Evacuate the tank, remove the grub screws from the bonnet, unscrew the bonnet and remove the pin (or ball, whichever type it is).

 

[SteveV]

Thank you for the quick response -

How do I safely evacuate the tank?

 

[nervoustrig]

Back off the low side burst disk (the one with the lower rating) just enough that it starts to hiss. When the hissing stops, back it off a little more until it starts hissing again. Repeat until empty.

 

[SteveV]

Thank you -

Hopefully there will be a happy ending lol -

Stay tuned!

 

[SteveV]

Back off the low side burst disk (the one with the lower rating) just enough that it starts to hiss. When the hissing stops, back it off a little more until it starts hissing again. Repeat until empty.

Thank you breaux -

That was a fast response, and your advice was 100% spot on -

Did just as you said, put everything back together, pressurized bottle, gun fires.

Has a very bad blow by issue at the transfer port, but that is fix-able.

Here's a pic of the "proto-type" lol -

Well it wasn't just the x-fer port leaking, also had a weird valve stem, looked like a P-rodmaybe? Anyway, re-sealed everything on her, replaced valve stem, now with a trimmed Disco hammer spring and no pre-load on the power adjuster, getting 705 fps with H&N 14.66. With power adjuster cranked all the way in just shy of coil bind, getting 845 fps.

I have another valve, and other barrels to play with, this may end up as a .25

If anyone has a Cothran or RC Machine riser breech just laying around not being used, give me a shout! Also really want to find an aftermarket 2250 stock for this thing, so it will feel less contraption-like.

Vines

 

[SteveV]

 



Here's how she's set up now -

Stace breech, CCS 18' .22 barrel, JDS Airman bottle, reg, and drop block, and a p-rod trigger group.

Hopefully the weather will hold up this afternoon for sight in and chrony work.

 

[Fuciliere]

Nice build there SteveV, I was also thinking of building one like that too, but with a discovery trigger group and add a wood stock, still thinking of whose drop block I want to get, bec they are kind a pricey.

 

[SteveV]

Thanks for the kind words. Check out JDS Airman, going out of business sale, everything half off, drop block only $50.00!