No Bleed Valve SPG?

[evsa]

Stupid should hurt ..

Feelin a little stupid after this one that’s for sure

 

[evsa]

How about a pic?

Yep, attached

 

[rongoodman]

That collar in the middle with the knurling doesn't rotate?

 

[Pearlman]

That collar in the middle with the knurling doesn't rotate?

If it’s not a DIY setup then maybe try turning it using a wrench to discover if it opens a release valve …

 

[tursiops]

I'd turn the gas off, wrap a towel around the gauge (so if it pops off it is protected) put a wrench on the right arrow nut to stabilize it, and slowly undo the spg at the left arrow. When it starts hissing, stop and let it hiss until the hissing stops, then undo it a bit more until the hissing starts again. Repeat until loose.

 

[The Chairman]

I'd turn the gas off, wrap a towel around the gauge (so if it pops off it is protected) put a wrench on the right arrow nut to stabilize it, and slowly undo the spg at the left arrow. When it starts hissing, stop and let it hiss until the hissing stops, then undo it a bit more until the hissing starts again. Repeat until loose.
View attachment 890808

This is the safest approach but still not safe. Please stand to the side as you do this and WEAR GLASSES!!! It's not safe no matter how you do this.

 

[evsa]

Sounds like the OP is in a dangerous situation with a safety hazard at hand… on the other hand looks like a common tool to read pressure directly off the tank …
View attachment 890467

There must be a pressure release mechanism somewhere in the setup…

Yep for all intents and purposes this is the setup. A photo is attached somewhere in the thread

 

[evsa]

Appreciate the input. Hopefully everyone sees that picture (it must have not attached the first time around) — here’s the pic again. So far it sounds like most solutions involve what we were thinking as well…

…slowly unscrew some part with a wrench (covered and away from potential areas that won’t handle well against the potential impact of a 3000 psi bullet) until pressure releases

 

[iliketopetsharks]

Appreciate the input. Hopefully everyone sees that picture (it must have not attached the first time around) — here’s the pic again. So far it sounds like most solutions involve what we were thinking as well…

…slowly unscrew some part with a wrench (covered and away from potential areas that won’t handle well against the potential impact of a 3000 psi bullet) until pressure releases

Is the knurled part a quick disconnect? Then just remove the male part und use a punch or similar to carefully depress the valve in the female part.

 

[inquis]

That collar in the middle with the knurling doesn't rotate?

For emphasis, try this first.