Help, I really f’d up. Filled w/o bleed valve.

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carpecervisi

Member
Apr 12, 2019
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MD, United States
I finally got around to pulling out two SCBA sets today in prep for a fun filled 4th. One tank had a CGA347 fitting but didn’t have a cut in thread so my fill station wouldn’t work. 

The other was a different setup. It only had the on/off knob and another valve. I have a Joe Brancato Guppy and checked to see if the micro bore hose would fit and it did. 

Here’s where I f’d up: I got all excited and hooked that cylinder up to my PCP and although it wasn’t full, it topped out my rifle around 200 bar. It was then I noticed there was no bleed valve. 

How the hell am I supposed to get this QD female connector on my air hose off the built in male fitting on the rifle? I can’t see any non-destructive way to do this. 

Help!!
 
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I believe discharge port is for that. Just crack open the cga347 If it's a scba you're talking about.
 
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My first thought is to shoot the pressure down until you can unscrew something. The CGA347 is probably your best bet. I think this is your safest route. Some "hand tight only" CGA347's have an area where you could put a wrench on them to assist with unscrewing. 

Then I thought, maybe you can unscrew the pressure gauge on the rifle (slowly, of course). This would bleed out all the air. 

If this doesn't work or isn't an option, you might be able to unscrew a fitting somewhere in your assembly. Best to do this at a more solid point of the setup like, near the CGA. I would NOT attempt this near the foster quick connect. 

It's hard to give better advise not knowing specifically what equipment you're working with. A pic would be very helpful.

Please wear safety glasses, ear protection, and gloves to help avoid injury to yourself! 
 
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All those ideas are good however cracking the hose is potentially more dangerous than shooting down your gun with guppy valve closed and when it gets around 1100 psi crack the air pressure guage on your rifle. I get nervous when putting stress on hoses under pressure. I would rather do it at the pressure guage unless you have no other alternative. 
 
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I think you are making it a big deal than it really is. Like others have suggested. Loosening the fill port till it slowly bleed, there will be threads still holding it from shooting out. Or you can loosen the gauge, it will also bleed out. Or shoot it down. Next time if you're filling your tank that doesn't have a bleed valve, use a fill station that has one before connecting to the tank.
 
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Like has been said turn valve off at tank, shoot gun down hose has 3000 psi once gun pressure drops the transfer port valve will open to allow the air that's in the line to bleed in do this down to below 500 psi or less then you can unscrew the line from the fitting slowly allowing the remaining air in the line to safely drain off without risking stripping threads 
 
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