1.8k burst disk on CO2?

[Boydster]

I'm pretty sure all CO2 tanks use 3k burst disks, as that's the only kind Oshman's sells, and the box they come in says it's for all CO2 tanks.

So why does mine have an 1800 psi disk? It's been working alright, blew just recently so I had my mother go get one from Oshman's.

I have 4 20 oz tanks, and 3 of them have the 3k kind. Should it be alright if I install the 3k burst disk onto the tank that blew the 1800 one? I bought this one tank new, and it came with the 1.8k disk so idk.

[deadeye9]

Older CO2 tanks have the 1800 psi burst disk. The 3K should work fine.
What you should be looking for is a "unified" or "one piece" burst disk.
Check out:

http://www.brasseagle.com/safetytips/cylinder_safety.asp

[stoupa]

This doesn't sound safe to me. Burst disk is meant as a safety device that allows the tank to vent when overpressured. If your tank was made to vent off when the pressure reaches 1.8K, then maybe it could rupture when the pressure would be going up to 3K. But that's just my guess.

[Nobody077]

You should look at the code stamped on the tank, it will list the max pressure and you shouldent use a burst disk above that pressure. I have some tanks rated at 1800psi and some rated at 3000psi, they have the numbers stamped near the bottle neck.

I have never had a burst disk blow, if they pop its usaly from overfilling or max fill/over fill and left in a car on a realy hot day. Not shure why yours went but is 50extra shots realy worth the risk if it was from over filling?

[deadeye9]

3K burst disks raise and interesting possiblity:

You could have 2999 psi going into your ASA, then into
your macroline, then into your valve, then ...

The 1800 psi disk will protect your equipment. A 3K disk may be
all the tank requires, but the downstream equipment needs
lower psi protection.

[Boydster]

3K burst disks raise and interesting possiblity:

You could have 2999 psi going into your ASA, then into
your macroline, then into your valve, then ...

The 1800 psi disk will protect your equipment. A 3K disk may be
all the tank requires, but the downstream equipment needs
lower psi protection.

Yes, but CO2 tanks do not have a regulator. They'll put out the same pressure no matter what untill it starts to get empty.

And from reading some on DocsMachine.com, I found that all CO2 tanks put ~1800 pounds out and are filled to that amount. So the burst disk is not meant to limit the tank from putting too much pressure out, it's meant to keep the tank from busting.

That must mean I need a 3000psi disk. 1800 pound disks are the minimum, and will burst easily if [the car heats up] and are used on few tanks. The actual tank should rupture at 3000+, so

Ah forget it, I don't know what I'm talking about. Maybe 3000 is so it'll bust when it gets filled up way too much and is really hot out.

[D-Block]

just get what was there before

[Boydster]

I went and checked out my tanks. All of them have 1800 engraved into the bottle.

Do you think that means it puts out 1800 pounds, busts at 1800, or what? I know all CO2 bottles put out 1800 psi, so idk. 3 of my tanks say 1800, yet came with a 3k burst disk.

[Spaceman613]

its 850 psi for co2, not 1800

1800 is working pressure of the tank (like the 3k fiber tanks are rated 3k working pressure)

[Nobody077]

The 1800 stamped on your tank is the max pressure the tank can safely hold, just like a 3000psi or 4500 psi nitro tank. You should use the 1800psi bust disks with those tanks

[Boydster]

Are all CO2 tanks 1800? All four of mine say that at least.

So I should replace all of the 3k kind with the 1.8k ones?

[trains are bad]

I would. And don't overfill your tanks because that is pointless.

[Boydster]

Ok, I may do that.

Final Q: Why does Academy and Oshman's sell 3k burst disks for CO2? That's the only kind they sell, and it's supposedly for CO2 tanks. I would think it would be 1800.

Oh here's a thought....

The tanks that come with 3k burst disks are of higher quality, and shouldn't need worrying of until the 3k range? The 1.8k tanks are cheap?

[D-Block]

Mine say 1.8k and are less than a year old, yet have a 3k disc. I would think the 3k discs would be fine.