Question for AIR Monkeys

[Dend78]

just wondering here, i got a tank and come to find out the burst disk hole threads have been stripped, so i was thinking how about a bushing? drill and tap the reg housing a lil bit to make one fit? lil loctite on the bushing threads (the good stuff not crappy lil bule) get it set in there and then the burst disk should be good to go. i figure this way even if the loctite fails it wont go shooting out since its been rethreaded at the larger size, actually the burst disk will still hold the seal so it shouldnt matter if the lt fails to seal it perfectly. just a thought what do you guys think?

[Spider-TW]

eeww...

If you drill on the body it will definitely weaken it when it comes to handling pressure. Even threading it for an imaginary burst disk of the next larger metric size makes you the owner and designer of your own high pressure regulator. I'm happy tweaking regulators, but I never mess with wall thickness or fasteners.

That really sounds like a factory or used body replacement.

[Dend78]

well its not gonna mess with it to much, especially since the seal is between the burst disk and the reg wall. plus its a PE reg so i wouldnt be to awful upset if i killed it. but on the other hand if it were to work like i think it would life would be good. obvioulsy it would be a slow filler, like 1000psi see if it blasts off, then let it sit for a week to see if it holds the pressure, then add another 1000psi and so on until your at 4500 besides whats the worst that could happen

[Spider-TW]

I hear what your saying about the wall. The reg collars have plenty of depth to them too.

However, make sure you leave a thickness above and below the bushing that is at least comparable to the exposed thickness of a high pressure fitting. There are 'hoop' stresses in two directions there that could lift a thin spot (if it's on the shoulder of the reg).

Also consider that a bushing will have around four times the force on the threads from the pressure because of its larger diameter.

[SuiCide6]

id go with buying a new reg id rather be safe than sorry especially with air tanks

[angrysasquatch]

Maybe you could tap it to the next size and use a helicoil with a burst disc. Use green loctite between the helicoil and wall, though.

[Spider-TW]

Maybe you could tap it to the next size and use a helicoil with a burst disc. Use green loctite between the helicoil and wall, though.

That occured to me also, but I've never seen a helicoil used under pressure and will loctite seal those gaps under that pressure? I guess I would try that over a bushing.

Oh, and that would be a blind hole to tap for the helicoil (or bushing). You would probably need starter and a mid tap for the tapered bushing or a starter and bottom tap for the helicoil.

[Dend78]

ive thought about a helicoil as well ill do some serious lookin and see what i can figure out

keep your eye on the Indiana news if you see something about a guy who blew his left arm off, messin with a compressed air tank regulator PM me for pics and things and ill get em to ya as soon as i can

[Spider-TW]

ive thought about a helicoil as well ill do some serious lookin and see what i can figure out

keep your eye on the Indiana news if you see something about a guy who blew his left arm off, messin with a compressed air tank regulator PM me for pics and things and ill get em to ya as soon as i can

No thanks. I had a good safety refresher class the other day that was mostly pics. Bleh!

[Dend78]

ill only send the good ones, like of my hot nurse and stuff like that. now see kids this is why you dont mess with things that can hurt you

[pyrodragon]

ill only send the good ones, like of my hot nurse and stuff like that. now see kids this is why you dont mess with things that can hurt you

because it always cost you in the end

[Railgun]

I gather this is the HP side and not the output side from your mentioning about slowly working up to the 4500 psi. With that being the case there's only one sane way to go with this.... buy a new body for the reg or just buy an new reg. The issue being that if the body is weakened then it may not be the burst disc that goes but the body itself and you could easily end up wiht a part of the body or the burst disc body ricocheting around the room or embedded in your body. 3000 psi is not something to be trifled with.

If it was on the other side I may be inclined to look at it but that's still a big IF. It's just best to buy a new body for the guts to go into or a whole new reg.

[Dend78]

I gather this is the HP side and not the output side from your mentioning about slowly working up to the 4500 psi. With that being the case there's only one sane way to go with this.... buy a new body for the reg or just buy an new reg. The issue being that if the body is weakened then it may not be the burst disc that goes but the body itself and you could easily end up wiht a part of the body or the burst disc body ricocheting around the room or embedded in your body. 3000 psi is not something to be trifled with.

If it was on the other side I may be inclined to look at it but that's still a big IF. It's just best to buy a new body for the guts to go into or a whole new reg.

where is your sense of adventure

yeah it is the HP side, and buying new would be the sane thing to do, but if we all did things the sane way the news would have nothing to report on i seriously dont see it weakening the housing much by just rethreading it to the next size. ill just fill this badboy in a steel box. i dont know for sure that im gonna try it but its a thought that ive been kicking around

[Sumthinwicked]

u could helocoil it maybe back to its threads might be worth looking into